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Product data sheet
Industrial
CompactFlashTM Card
C-440 Series
up to UDMA6 / MDMA4 / PIO6
BU: Flash Products
Date : Septe mber 25, 2013
Revisi o n: 1.22
File:
C- 440_ data_sheet_ CF -HxB U_Rev 12 2.doc
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C-440 Series – Industrial UDMA CompactFlash™ Card,
2GByte up to 64GByte, 3.3/5V Supply
1 Main Features
Highly-integrated memory controller
o CompactFlashTM specification 4.1,
compatible with specification 5.0
o PCMCIA specification 2.1 (chapter CF-ATA Registers) &
PC Card ATA Interface Specification 8, 7, 6, and 5
o True IDE mode compatible,
up to UDMA6 / MDMA4 / PIO6 supported
o Fix drive (IDE mode) & removable drive (PC card mode)
as default in the same card
o Hot swappable in PC card modes
o Signal termination resistors to improve signal quality
o LBA48 address support (LBA28 limitation on request)
o Fix drive (IDE mode) &
removable drive (PC card mode) as default configuration
Small form factor
o CFC Type I: 36.4mm x 42.8mm x 3.3mm
Low-power CMOS technology
3.3V or 5.0V power supply, card drives bus with 3.3V, inputs 5V compatible
Power saving mode (with automatic wake-up)
S.M.A.R.T. support and extended vendor information
Wear Leveling: equal wear leveling of static and dynamic data
The wear leveling assures that dynamic data as well as static data is balanced evenly across the
memory. With that the maximum write endurance of the device is guaranteed.
Data Retention: 10 year (JESD47)
Patented power-off reliability
o No data loss of older sectors
o Max. 32 sectors data loss (old data kept)
High reliability
o MTBF >3,000,000 hours
o Data reliability: < 1 non-recoverable error per 1014 bits read
o Number of connector insertions/removals: >10,000
o 24bit per double sector ECC capability
o Near Miss ECC handling at read (refresh and correct data, if multiple correctable errors
detected)
o Read Disturb Management (RDM, refresh and correct data after a certain number of read
commands per block)
High performance
o Up to 133MB/s burst transfer rate in UDMA6
o Sustained Write performance: up to 40MB/s (UDMA6 untrimmed)
o Sustained Read Performance: up to 65MB/s (UDMA6)
o Trim command supported to increase random write performance
o Up to 300 IOPS with Trim Support (4k random write) and up to 32 IOPS untrimmed
Available densities
o up to 64GBytes (SLC NAND Flash)
Operating System support
o Standard Software Drivers operation CompactFlashTM
2 Temperature ranges
o Commercial Temperature range 0 … +70°C
o Industrial Temperature range -40 … +85°C
Life Cycle Management
Controlled BOM
RoHS compatible
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2 Table of Contents
1 MAIN FEATURES ..................................................................................................................................................................... 2
2 TABLE OF CONTENTS ............................................................................................................................................................... 3
3 ORDER INFORMATION............................................................................................................................................................. 6
3.1 STANDARD PART NUMBERS ............................................................................................................................................................... 6
3.2 SUPPORTED FEATURES .................................................................................................................................................................... 6
3.3 OFFERED OEM OPTIONS ON REQUEST ................................................................................................................................................ 6
4 PRODUCT SPECIFICATION ........................................................................................................................................................ 7
4.1 SYSTEM PERFORMANCE ................................................................................................................................................................... 7
4.2 ENVIRONMENTAL SPECIFICATIONS...................................................................................................................................................... 8
4.3 PHYSICAL DIMENSIONS ................................................................................................................................................................... 9
4.4 RELIABILITY ................................................................................................................................................................................. 9
4.5 DRIVE GEOMETRY / CHS PARAMETER ............................................................................................................................................... 9
4.6 PHYSICAL DESCRIPTION ................................................................................................................................................................ 10
5 ELECTRICAL INTERFACE ......................................................................................................................................................... 11
5.1 ELECTRICAL DESCRIPTION ............................................................................................................................................................... 11
5.2 ELECTRICAL SPECIFICATION ............................................................................................................................................................. 16
5.3 ADDITIONAL REQUIREMENTS FOR COMPACTFLASHTM ADVANCED TIMING MODE .......................................................................................... 17
6 COMMAND INTERFACE .......................................................................................................................................................... 18
6.1 ATTRIBUTE MEMORY READ AND WRITE ............................................................................................................................................ 18
6.2 COMMON MEMORY READ AND WRITE ............................................................................................................................................. 19
6.3 I/O READ AND WRITE .................................................................................................................................................................. 21
6.4 TRUE IDE MODE ........................................................................................................................................................................ 22
6.5 ULTRA DMA MODE .................................................................................................................................................................... 24
7 CARD CONFIGURATION ......................................................................................................................................................... 43
7.1 CONFIGURATION OPTION REGISTER (200H IN ATTRIBUTE MEMORY) ....................................................................................................... 43
7.2 COMPACTFLASHTM MEMORY CARD CONFIGURATIONS............................................................................................................................ 44
7.3 PIN REPLACEMENT REGISTER (204H IN ATTRIBUTE MEMORY) .............................................................................................................. 44
7.4 ATTRIBUTE MEMORY FUNCTION ...................................................................................................................................................... 45
7.5 I/O TRANSFER FUNCTION .............................................................................................................................................................. 46
7.6 COMMON MEMORY TRANSFER FUNCTION.......................................................................................................................................... 46
7.7 TRUE IDE MODE I/O FUNCTION ...................................................................................................................................................... 46
7.8 HOST CONFIGURATION REQUIREMENTS FOR MASTER/SLAVE OR NEW TIMING MODES ................................................................................ 47
8 SOFTWARE INTERFACE .......................................................................................................................................................... 48
8.1 CF-ATA DRIVE REGISTER SET DEFINITION AND PROTOCOL ................................................................................................................... 48
8.2 MEMORY MAPPED ADDRESSING .................................................................................................................................................... 48
8.3 CONTIGUOUS I/O MAPPED ADDRESSING .......................................................................................................................................... 49
8.4 I/O PRIMARY AND SECONDARY ADDRESS CONFIGURATIONS ................................................................................................................. 50
8.5 TRUE IDE MODE ADDRESSING ...................................................................................................................................................... 50
9 CF-ATA REGISTERS ............................................................................................................................................................... 51
9.1 DATA REGISTER ........................................................................................................................................................................... 51
9.2 ERROR REGISTER ........................................................................................................................................................................ 51
9.3 FEATURE REGISTER ...................................................................................................................................................................... 52
9.4 SECTOR COUNT REGISTER .............................................................................................................................................................. 52
9.5 SECTOR NUMBER (LBA 7:0) REGISTER ........................................................................................................................................... 52
9.6 CYLINDER LOW (LBA 15:8) REGISTER ............................................................................................................................................ 52
9.7 CYLINDER HIGH (LBA 23:16) REGISTER ......................................................................................................................................... 52
9.8 DRIVE/HEAD (LBA 27:24) REGISTER ............................................................................................................................................. 53
9.9 STATUS & ALTERNATE STATUS REGISTERS ........................................................................................................................................ 54
9.10 DEVICE CONTROL REGISTER ......................................................................................................................................................... 54
9.11 CARD (DRIVE) ADDRESS REGISTER ................................................................................................................................................. 55
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10 CF-ATA COMMAND DESCRIPTION ......................................................................................................................................... 56
10.1 CHECK POWER MODE (98H OR E5H) ............................................................................................................................................ 58
10.2 DATA SET MANAGEMENT (06H) TRIM .......................................................................................................................................... 58
10.3 ERASE SECTOR(S) (C0H) ............................................................................................................................................................. 58
10.4 EXECUTE DRIVE DIAGNOSTIC (90H) .............................................................................................................................................. 58
10.5 FLUSH CACHE (E7H) .................................................................................................................................................................. 59
10.6 FLUSH CACHE EXT (EAH) 48BIT LBA............................................................................................................................................ 59
10.7 FORMAT TRACK (50H) ................................................................................................................................................................ 60
10.8 IDENTIFY DEVICE (ECH) .............................................................................................................................................................. 60
10.9 IDLE (97H OR E3H) ................................................................................................................................................................... 70
10.10 IDLE IMMEDIATE (95H OR E1H) .................................................................................................................................................. 70
10.11 INITIALIZE DRIVE PARAMETERS (91H) ........................................................................................................................................... 70
10.12 NOP (00H) ........................................................................................................................................................................... 71
10.13 READ BUFFER (E4H) ................................................................................................................................................................ 71
10.14 READ DMA (C8H) ................................................................................................................................................................... 71
10.15 READ DMA EXT (25H) 48BIT LBA ............................................................................................................................................. 72
10.16 READ MULTIPLE (C4H) ............................................................................................................................................................. 72
10.17 READ MULTIPLE EXT (29H) 48BIT LBA ....................................................................................................................................... 73
10.18 READ SECTOR(S) (20H OR 21H) .................................................................................................................................................. 74
10.19 READ SECTORS EXT (24H) 48BIT LBA ......................................................................................................................................... 74
10.20 READ VERIFY SECTOR(S) (40H).................................................................................................................................................. 74
10.21 READ VERIFY EXT (42H) 48BIT LBA ........................................................................................................................................... 75
10.22 RECALIBRATE (1XH) .................................................................................................................................................................. 75
10.23 REQUEST SENSE (03H) ............................................................................................................................................................. 75
10.24 SEEK (7XH) ............................................................................................................................................................................ 76
10.25 SECURITY DISABLE PASSWORD (F6H) .......................................................................................................................................... 76
10.26 SECURITY ERASE PREPARE (F3H) ................................................................................................................................................ 77
10.27 SECURITY ERASE UNIT (F4H) ...................................................................................................................................................... 77
10.28 SECURITY FREEZE LOCK (F5H) .................................................................................................................................................... 77
10.29 SECURITY SET PASSWORD (F1H) ................................................................................................................................................. 77
10.30 SECURITY UNLOCK (F2H) .......................................................................................................................................................... 78
10.31 SET FEATURES (EFH) ................................................................................................................................................................ 79
10.32 SET MULTIPLE MODE (C6H) ...................................................................................................................................................... 80
10.33 SET SLEEP MODE (99H OR E6) ................................................................................................................................................. 81
10.34 S.M.A.R.T. (B0H) ................................................................................................................................................................ 81
10.35 STANDBY (96H OR E2) ............................................................................................................................................................ 82
10.36 STANDBY IMMEDIATE (94H OR E0H) .......................................................................................................................................... 82
10.37 TRANSLATE SECTOR (87H).......................................................................................................................................................... 82
10.38 WRITE BUFFER (E8H) ............................................................................................................................................................. 83
10.39 WRITE DMA (CAH) ................................................................................................................................................................. 83
10.40 WRITE DMA EXT (35H) 48BIT LBA .......................................................................................................................................... 83
10.41 WRITE MULTIPLE COMMAND (C5H) ............................................................................................................................................. 84
10.42 WRITE MULTIPLE EXT (39H) 48BIT LBA ..................................................................................................................................... 84
10.43 WRITE MULTIPLE WITHOUT ERASE (CDH) ..................................................................................................................................... 85
10.44 WRITE SECTOR(S) (30H OR 31H) ................................................................................................................................................ 85
10.45 WRITE SECTOR(S) EXT (34H) 48BIT LBA .................................................................................................................................... 86
10.46 WRITE SECTOR(S) WITHOUT ERASE (38H) .................................................................................................................................... 86
10.47 WRITE VERIFY (3CH) ................................................................................................................................................................ 86
11 S.M.A.R.T FUNCTIONALITY ................................................................................................................................................... 87
11.1 S.M.A.R.T. ENABLE / DISABLE OPERATIONS ................................................................................................................................... 87
11.2 S.M.A.R.T. ENABLE / DISABLE ATTRIBUTE AUTOSAVE ...................................................................................................................... 87
11.3 S.M.A.R.T. READ DATA ............................................................................................................................................................. 87
11.4 S.M.A.R.T. READ ATTRIBUTE THRESHOLDS .................................................................................................................................... 92
11.5 S.M.A.R.T. RETURN STATUS ....................................................................................................................................................... 93
12 CIS INFORMATION (TYPICAL) ................................................................................................................................................. 94
13 PACKAGE MECHANICAL ......................................................................................................................................................... 98
14 DECLARATION OF CONFORMITY............................................................................................................................................. 99
15 ROHS AND WEEE UPDATE FROM SWISSBIT ........................................................................................................................ 100
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16 PART NUMBER DECODER .................................................................................................................................................... 102
16.1 MANUFACTURER....................................................................................................................................................................... 102
16.2 MEMORY TYPE ........................................................................................................................................................................ 102
16.3 PRODUCT TYPE ........................................................................................................................................................................ 102
16.4 DENSITY ................................................................................................................................................................................ 102
16.5 PLATFORM ............................................................................................................................................................................. 102
16.6 PRODUCT GENERATION ............................................................................................................................................................. 102
16.7 MEMORY ORGANIZATION ........................................................................................................................................................... 102
16.8 CONTROLLER TYPE .................................................................................................................................................................... 102
16.9 NUMBER OF FLASH CHIP .......................................................................................................................................................... 102
16.10 FLASH CODE ......................................................................................................................................................................... 102
16.11 TEMP. OPTION ....................................................................................................................................................................... 103
16.12 DIE CLASSIFICATION ................................................................................................................................................................ 103
16.13 PIN MODE ........................................................................................................................................................................... 103
16.14 COMPACT FLASH XYZ .............................................................................................................................................................. 103
16.15 OPTION ................................................................................................................................................................................ 103
17 SWISSBIT CF LABEL SPECIFICATION .................................................................................................................................... 104
17.1 FRONT SIDE LABEL ..................................................................................................................................................................... 104
17.2 BACK SIDE LABEL ...................................................................................................................................................................... 104
18 REVISION HISTORY .............................................................................................................................................................. 105
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3 Order Information
3.1 Standard part numbers
IDE-FIX & PC card-Removable / PIO, DMA & UDMA support
Density
Part Number
2GB
SFCF2048HxBU2TO-t-MS-5y7-STD
4GB
SFCF4096HxBU4TO-t-MS-5y7-STD
8GB
SFCF8192HxBU2TO-t-QT-5y7-STD
16GB
SFCF16GBHxBU4TO-t-QT-5y7-STD
32GB
SFCF32GBHxBU4TO-t-QT-5y7-STD
64GB
SFCF64GBHxBU4TO-t-NU-5y7-STD
Table 1: Product list for standard product variations
X = depends on product generation;
y = depends on latest FW revision
t = C: commercial temperature; I: industrial temperature
3.2 Supported Features
MDMA/UDMA also in PC card mode
SMART Feature Set with additional life time information
TRIM command
48bit Address Feature Set
Security Mode Feature Set
Power Management Feature Set
Write Cache
Write_Buffer Command
Read_Buffer Command
NOP_Command
Flush_Cache_EXT
3.3 Offered OEM options on request
Write Protect switch
Disabling MDMA and/or UDMA modes
Customer specified card size and card geometry (C/H/S – cylinder/head/sector)
Customer specified CIS and drive ATA-ID strings
Preload service (also images with any file system)
Customized label
ROM mode (write protected with preloaded software)
Special Firmware solutions for additional customer requirements
…
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4 Product Specification
The CompactFlashTM is a small form factor non-volatile memory card which provides high capacity data storage. Its
aim is to capture, retain and transport data, audio and images, facilitating the transfer of all types of digital
information between a large variety of digital systems.
The Card operates in three basic modes:
PC card ATA I/O mode
PC card ATA memory mode
True IDE mode
The CompactFlashTM also supports Advanced Timing modes. Advanced Timing modes are ATA I/O modes that are
100ns or faster, ATA Memory modes that are 100ns or 80ns.
Standard cards are shipped as max. UDMA6 (30ns) and PIO6/MDMA4 (80ns).
If the cards should be used in extended speed modes, they should be qualified on the target system and the
system should fulfill the requirements listed below.
It conforms to the PCMCIA Card Specification 2.1 when operating in the ATA I/O mode, and in the ATA Memory mode
(Personal Computer Memory Card International Association standard, JEIDA in Japan), and to the ATA specification
when operating in True IDE Mode. CompactFlashTM Cards can be used with passive adapters in a PC-Card Type I, II,
or Type III socket.
The Card has an internal intelligent controller which manages interface protocols, data storage and retrieval as
well as hardware BCH-code Error Correction Code (ECC), defect handling, diagnostics and clock control.
The wear leveling mechanism assures an equal usage of the Flash memory cells to extend the life time.
Once the Card has been configured by the host, it behaves as a standard ATA (IDE) disk drive. The hardware ECC
mechanism allows to detect and correct 6 bit per sector or 24 bit per double sector, depending on the flash.
The Card has a voltage detector and a powerful power-loss management feature to prevent data corruption after
power-down.
The specification has been realized and approved by the CompactFlashTM Association (CFA).
This non-proprietary specification enables users to develop CF products that function correctly and are compatible
with future CF design. The system highlights are shown in Table 2 … Table 8.
Related Documentation
CF+ and CompactFlashTM Specification Revision 4.1, 5.0
AT Attachment Interface Document, American National Standards Institute, ATA-7, 2005
PCMCIA PC Card Standard, 1995
PCMCIA PC Card ATA Specification 7
ATA Command Set 2 (ACS-2) for TRIM command
4.1 System Performance
Table 2: System Performance
System Performance
Typ.
Max.
Unit
Sleep to write
5
ms
Sleep to read
5
Power up to Ready
<500
1000
Reset to Ready (PC card/IDE Master )
200
500
Data transfer Rate (UDMA6 burst)
133
MB/s
Sustained Read (measured)
2 channel 4k(1, 3)
2GB-16GB
59
65
MB/s
Sustained Write (measured)
2 channel 4k(1, 3)
2GB-16GB
31
35
Sustained Read (measured)
2 channel 8k(1, 3)
32GB-64GB
58
65
MB/s
Sustained Write (measured)
2 channel 8k(1, 3)
32GB-64GB
31
35
Random Write 4k(measured)
2 channel 4k(1, 2)
2GB-16GB
32
170 (300)
IOPS
(input/output per second)
Random Write 4k(measured)
2 channel 8k(1, 2)
32GB-64GB
27
160 (300)
Command to DRQ
Read
100
250000
µs
Write
30
500
Access Time
Read
0.22
ms
1. All values refer to Toshiba Flash chips with firmware revision 1
2. The number of IOPS was measured with a fully used and a trimmed card with IOMETER
3. CompactFlashTM Card in UDMA mode 6, cycle time 30ns in True-IDE mode with Sequential write/read test.
The number of flash is decoded in the part number; also the flash page size is depicted in this table.
Sustained Speed depends on flash type and number, file size, and burst speed.
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Requirements for using extended speed (PIO 5, 6/ MDMA 3, 4)
(CompactFlashTM Specification 5.0; section 4.3.7)
The CF Advanced Timing modes include PCMCIA I/O and Memory modes that are 100ns or faster and True IDE PIO
Modes 5, 6 and Multiword DMA Modes 3, 4.
When operating in CF Advanced timing modes, the host shall conform to the following requirements:
1. Only one CF device shall be attached to the CF Bus.
2. The host shall not present a load of more than 40pF to the device for all signals, including any cabling.
3. The maximum cable length is 0.05 m (2 in). The cable length is measured from the card connector to the
host controller. 0.46 m (18 in) cables are not supported.
4. The –WAIT and IORDY signals shall be ignored by the host.
Devices supporting CF Advanced timing modes shall also support slower timing modes, to ensure operability with
systems that do not support CF Advanced timing modes.
Ultra DMA Electrical Requirements
(CompactFlashTM Specification 5.0; section 4.3.8)
Operation in Ultra DMA mode requires careful attention to cabling, printed circuit board (PCB) trace routing and
termination for reliable operation. These requirements are described in the following sections.
Host and Card signal capacitance limits for Ultra DMA operation
The host interface signal capacitance at the host connector shall be a maximum of 25pF for each signal as
measured at 1 MHz.
The card interface signal capacitance at the card connector shall be a maximum of 20pF for each signal as
measured at 1 MHz.
Series termination required for Ultra DMA operation
Series termination resistors are required at both the host and the card for operation in any of the Ultra DMA
modes. The CF specification describes typical values for series termination at the host and the device.
C-400 cards have the specified serial resistances in IDE bus.
4.2 Environmental Specifications
4.2.1 Recommended Operating Conditions
Table 3: CF Card Recommended Operating Conditions
Parameter
Value
Commercial Operating Temperature
0°C to 70°C
Industrial Operating Temperature
-40°C to 85°C
Power Supply VCC Voltage (5V)
5.0V ±10% (4.5V to 5.5V) *)
Power Supply VCC Voltage (3.3V)
3.3V ±10% (2.97V to 3.63V) *)
*) Voltage could be between 2.95V and 5.5V
Table 4: Current consumption (1)
Current Consumption (typ)
3.3V
5V
Unit
Read (UDMA6/max)
110 / 140
110 / 140
mA
Write (UDMA6/max)
90 / 110
85 / 110
Sleep/Idle Mode (typ/max)
3 / 5
3 / 5
1. All values are typical at 25° C and nominal supply voltage and refer to 8Gbyte CompactFlashTM Card.
Max values are for 32GB cards in UDMA6 mode in IDE mode.
The card goes to Sleep/idle mode 20ms (default) after last host command.
The sleep current at 5V depends on the signal level at the CF-Bus
4.2.2 Recommended Storage Conditions
Table 5: CF Card Recommended Storage Conditions
Parameter
Value
Storage Temperature
-50°C to 100°C
High temperature storage decreases the data retention.
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4.2.3 Shock, Vibration, and Humidity
Table 6: Shock, Vibration, and Humidity
Parameter
Value
Humidity (non-condensing)
85% RH 85°C, 1000 hrs (JEDEC JESD22, method A101-B)
Vibration
20 G peak, 20-2000Hz, 4 per direction (JEDEC JESD22, method B103)
5.35G RMS, 15 min per plane (IEC 68-2-6)
Shock
1.5k G peak, 0.5ms 5 times (JEDEC JESD22, method B110)
30 G, 11ms 1 time (IEC 68-2-27)
4.3 Physical Dimensions
Table 7: Physical Dimensions
Parameter
Value
Unit
Width
42.8
mm
Height
36.4
Thickness
3.3
Weight (typ.)
10
g
4.4 Reliability
Table 8: System Reliability and Maintenance
Parameter
Value
MTBF (at 40°C)
> 3,000,000 hours (1)
Insertions/Removals
> 10,000
Data Reliability
< 1 Non-Recoverable Error per 1014 bits Read (1)
Data Retention
10 years (JESD47)
(1) Dependent on final system qualification data.
4.5 Drive Geometry / CHS Parameter
Table 9: CF capacity specification
Capacity
Cylinders
Heads
Sectors / track
Sectors
Total addressable capacity (Byte)
2GB
3,970
16
63
4,001,760
2,048,901,120
4GB
7,964
16
63
8,027,712
4,110,188,544
8GB
15,880
16
63
16,007,040
8,195,604,480
16GB
16,383 (1)
16
63
31,717,728
16,239,476,736
32GB
16,383 (1)
16
63
64,028,160
32,782,417,920
64GB
16,383 (1)
16
63
125,313,024
64,160,268,288
(1) The CHS addressing is limited to about 8GB. Larger drives should be used in LBA mode.
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4.6 Physical description
The CompactFlashTM Memory Card contains a single chip controller and Flash memory module(s). The controller
interfaces with a host system allowing data to be written to and read from the Flash memory module(s). Figure 1
shows the Block Diagram of the CompactFlashTM Memory Card.
The Card is offered in a Type I package with a 50-pin connector consisting of two rows of 25 female contacts on 50
mil (1.27mm) centers. Figure 21 shows Type I Card Dimensions.
Figure 1: CompactFlashTM Memory Card Block Diagram
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5 Electrical interface
5.1 Electrical description
The CompactFlashTM Memory Card operates in three basic modes:
PC Card ATA using I/O Mode
PC Card ATA using Memory Mode
True IDE Mode with MWDMA and UDMA, which is compatible with most disk drives
The signal/pin assignments are listed in Table 10 Low active signals have a ‘-’ prefix. Pin types are Input, Output
or Input/Output.
The configuration of the Card is controlled using the standard PC card configuration registers starting at address
200h in the Attribute Memory space of the memory card. Table 11 describes the I/O signals. Inputs are signals
sourced from the host while Outputs are signals sourced from the Card. The signals are described for each of the
three operating modes.
All outputs from the Card are totem pole except the data bus signals that are bi-directional tri-state. Refer to the
section titled “Electrical Specifications” for definitions of Input and Output type.
Table 10: Pin Assignment and Pin Type
Pin Num
PC Card Memory Mode
PC Card I/O Mode
True IDE Mode(4)
Signal
Name
Pin
Type
In, Out
Type
Signal
Name
Pin
Type
In, Out
Type
Signal
Name
Pin
Type
In, Out
Type
1
GND
Ground
GND
Ground
GND
Ground
2
D3
I/O
I1Z,OZ3
D3
I/O
I1Z,OZ3
D3
I/O
I1Z,OZ3
3
D4
I/O
I1Z,OZ3
D4
I/O
I1Z,OZ3
D4
I/O
I1Z,OZ3
4
D5
I/O
I1Z,OZ3
D5
I/O
I1Z,OZ3
D5
I/O
I1Z,OZ3
5
D6
I/O
I1Z,OZ3
D6
I/O
I1Z,OZ3
D6
I/O
I1Z,OZ3
6
D7
I/O
I1Z,OZ3
D7
I/O
I1Z,OZ3
D7
I/O
I1Z,OZ3
7
-CE1
I
I3U
-CE1
I
I3U
-CS0
I
I3Z
8
A10
I
I1Z
A10
I
I1Z
A10(2)
I
I1Z
9(1)
-OE
I
I3U
-OE
I
I3U
-ATASEL
I
I3U
10
A9
I
I1Z
A9
I
I1Z
A9(2)
I
I1Z
11
A8
I
I1Z
A8
I
I1Z
A8(2)
I
I1Z
12
A7
I
I1Z
A7
I
I1Z
A7(2)
I
I1Z
13
Vcc
Power
Vcc
Power
Vcc
Power
14
A6
I
I1Z
A6
I
I1Z
A6(2)
I
I1Z
15
A5
I
I1Z
A5
I
I1Z
A5(2)
I
I1Z
16
A4
I
I1Z
A4
I
I1Z
A4(2)
I
I1Z
17
A3
I
I1Z
A3
I
I1Z
A3(2)
I
I1Z
18
A2
I
I1Z
A2
I
I1Z
A2
I
I1Z
19
A1
I
I1Z
A1
I
I1Z
A1
I
I1Z
20
A0(11)
I
I1Z
A0(11)
I
I1Z
A0
I
I1Z
21
D0
I/O
I1Z,OZ3
D0
I/O
I1Z,OZ3
D0
I/O
I1Z,OZ3
22
D1
I/O
I1Z,OZ3
D1
I/O
I1Z,OZ3
D1
I/O
I1Z,OZ3
23
D2
I/O
I1Z,OZ3
D2
I/O
I1Z,OZ3
D2
I/O
I1Z,OZ3
24
WP
O
OT3
-IOIS16(10)
O
OT3
-IOIS16
O
ON3
25
-CD2
O
Ground
-CD2
O
Ground
-CD2
O
Ground
26
-CD1
O
Ground
-CD1
O
Ground
-CD1
O
Ground
27
D11(1)
I/O
I1Z,OZ3
D11(1)
I/O
I1Z,OZ3
D11(1)
I/O
I1Z,OZ3
28
D12(1)
I/O
I1Z,OZ3
D12(1)
I/O
I1Z,OZ3
D12(1)
I/O
I1Z,OZ3
29
D13(1)
I/O
I1Z,OZ3
D13(1)
I/O
I1Z,OZ3
D13(1)
I/O
I1Z,OZ3
30
D14(1)
I/O
I1Z,OZ3
D14(1)
I/O
I1Z,OZ3
D14(1)
I/O
I1Z,OZ3
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Pin Num
PC Card Memory Mode
PC Card I/O Mode
True IDE Mode(4)
Signal
Name
Pin
Type
In, Out
Type
Signal
Name
Pin
Type
In, Out
Type
Signal
Name
Pin
Type
In, Out
Type
31
D15(1)
I/O
I1Z,OZ3
D15(1)
I/O
I1Z,OZ3
D15(1)
I/O
I1Z,OZ3
32
-CE2(1)
I
I3U
-CE2(1)
I
I3U
-CS1(1)
I
I3Z
33
-VS1
O
Ground
-VS1
O
Ground
-VS1
O
Ground
34
-IORD
I
I3U
-IORD
I
I3U
-IORD(7)
I
I3Z
HSTROBE(8)
-HDMARDY(9)
35
-IOWR
I
I3U
-IOWR
I
I3U
-IOWR(7)
I
I3Z
STOP(8)(9)
36
-WE
I
I3U
-WE
I
I3U
-WE(3)
I
I3U
37
READY
O
OT1
-IREQ
O
OT1
INTRQ
O
OZ1
38
Vcc
Power
Vcc
Power
Vcc
Power
39
-CSEL(5)
I
I2Z
-CSEL(5)
I
I2Z
-CSEL
I
I2U
40
-VS2
O
OPEN
-VS2
O
OPEN
-VS2
O
OPEN
41
RESET
I
I2U
RESET
I
I2U
-RESET
I
I2U
42
-WAIT
O
OT1
-WAIT
O
OT1
IORDY(7)
O
ON1
-DDMARDY(8)
DSTROBE(9)
43
-INPACK
O
OT1
-INPACK
O
OT1
DMARQ
O
OZ1
44
-REG
I
I3U
-REG
I
I3U
-DMACK(6)
I
I3U
45
BVD2
I/O
I1U,OT1
-SPKR
I/O
I1U,OT1
-DASP
I/O
I1U,ON1
46
BVD1
I/O
I1U,OT1
-STSCHG
I/O
I1U,OT1
-PDIAG
I/O
I1U,ON1
47
D8(1)
I/O
I1Z,OZ3
D8(1)
I/O
I1Z,OZ3
D8(1)
I/O
I1Z,OZ3
48
D9(1)
I/O
I1Z,OZ3
D9(1)
I/O
I1Z,OZ3
D9(1)
I/O
I1Z,OZ3
49
D10(1)
I/O
I1Z,OZ3
D10(1)
I/O
I1Z,OZ3
D10(1)
I/O
I1Z,OZ3
50
GND
Ground
GND
Ground
GND
Ground
1. These signals are required only for 16 bit accesses and not required when installed in 8 bit systems.
Devices should allow for 3-state signals not to consume current.
2. The signal should be grounded by the host.
3. The signal should be tied to VCC by the host.
4. The mode is required for CompactFlashTM Storage Cards.
5. The –CSEL signal is ignored by the card in PC Card modes. However, because it is not pulled up on the card
in these modes, it should not be left floating by the host in PC Card modes. In these modes, the pin
should be connected by the host to PC Card A25 or grounded by the host.
6. If DMA operations are not used, the signal must be held high or tied to VCC by the host, also for read
registers.
7. Signal usage in True IDE Mode except when Ultra DMA mode protocol is active.
8. Signal usage in True IDE Mode when Ultra DMA mode protocol DMA Write is active.
9. Signal usage in True IDE Mode when Ultra DMA mode protocol DMA Read is active. The signal should be
grounded by the host.
10. In PC-Card mode, the IOIS16 signal does not work as fully specified. If a host uses this signal, this may
result in 16 bit accesses being changed to two 8 bit accesses. Depending on the address, this may result
in an incompatibility with the host controller.
11. In PC-Card mode (memory and I/O), 16 bit ATA register file accesses (i.e. both -CE1 and -CE2 asserted) do
not work as fully specified if A0 is high.
If you have host-card incompatibilities please contact Swissbit.
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Table 11: Signal Description
Signal Name
Dir.
Pin
Description
A10 to A0
(PC Card Memory Mode)
I
8,10,11,12,
14,15,16,17,
18,19,20
These address lines along with the –REG signal are used to select the following:
The I/O port address registers within the CompactFlashTM Storage Card, the
memory mapped port address registers within the CompactFlashTM Storage Card,
a byte in the card’s information structure and its configuration control and
status registers.
In PC-Card mode, 16 bit ATA register file accesses (i.e. both -CE1 and -CE2 low)
do not work if A0 is high. A simple test will show the C-400 compatibility to a
certain host. If the C-400 cards can be recognized (Identify Device and MBR
data is read out successfully), then this PC card issue will likely not affect the
operation in this host. (1)
A10 to A0
(PC Card I/O Mode)
This signal is the same as the PC Card Memory Mode signal.
A2 to A0
(True IDE Mode)
In True IDE Mode, only A[2:0] are used to select the one of eight registers in the
Task File, the remaining address lines should be grounded by the host.
BVD1
(PC Card Memory Mode)
I/O
46
This signal is asserted high, as BVD1 is not supported.
–STSCHG
(PC Card I/O Mode)
This signal is asserted low to alert the host to changes in the READY and Write
Protect states, while the I/O interface is configured. Its use is controlled by the
Card Config and Status Register.
–PDIAG
(True IDE Mode)
In the True IDE Mode, this input / output is the Pass Diagnostic signal in the
Master / Slave handshake protocol.
BVD2
(PC Card Memory Mode)
I/O
45
This signal is asserted high, as BVD2 is not supported.
–SPKR
(PC Card I/O Mode)
This line is the Binary Audio output from the card. If the Card does not support
the Binary Audio function, this line should be held negated.
–DASP
(True IDE Mode)
In the True IDE Mode, this input/output is the Disk Active/Slave Present signal in
the Master/Slave handshake protocol.
D15-D0 (PC Card Memory
Mode)
I/O
31, 30, 29,
28, 27, 49,
48, 47, 6,
5, 4, 3, 2,
23, 22, 21
These lines carry the Data, Commands and Status information between the host
and the controller. D0 is the LSB of the Even Byte of the Word. D8 is the LSB of
the Odd Byte of the Word.
D15-D0 (PC Card I/O Mode)
This signal is the same as the PC Card Memory Mode signal.
D15-D0 (True IDE Mode)
In True IDE Mode, all Task File operations occur in byte mode on the low order
bus D[7:0] while all data transfers are 16 bit using D[15:0].
GND
(PC Card Memory Mode)
1, 50
Ground.
GND
(PC Card I/O Mode)
Same for all modes.
GND
(True IDE Mode)
Same for all modes.
–INPACK
(PC Card Memory Mode)
O
43
This signal is not used in this mode.
–INPACK
(PC Card I/O Mode)
The Input Acknowledge signal is asserted by the CompactFlashTM Storage Card
when the card is selected and responding to an I/O read cycle at the address
that is on the address bus. This signal is used by the host to control the enable
of any input data buffers between the CompactFlashTM Storage Card and the
CPU.
DMARQ
(True IDE Mode)
This signal is a DMA Request that is used for DMA data transfers between host
and device. It shall be asserted by the device when it is ready to transfer data
to or from the host. For Multiword DMA transfers, the direction of data transfer
is controlled by –IORD and –IOWR. This signal is used in a handshake manner
with –DMACK, i.e., the device shall wait until the host asserts –DMACK before
negating DMARQ, and reasserting DMARQ if there is more data to transfer.
DMARQ shall not be driven when the device is not selected.
While a DMA operation is in progress, -CS0 and –CS1 shall be held negated and
the width of the transfers shall be 16 bits.
If there is no hardware support for DMA mode in the host, this output signal is
not used and should not be connected at the host. In this case, the BIOS must
report that DMA mode is not supported by the host so that device drivers will
not attempt DMA mode.
A host that does not support DMA mode and implements both PC card and
True-IDE modes of operation need not alter the PC card mode connections
while in True-IDE mode as long as this does not prevent proper operation in
any mode.
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Signal Name
Dir.
Pin
Description
–IORD
(PC Card Memory Mode)
I
34
This signal is not used in this mode.
–IORD
(PC Card I/O Mode)
This is an I/O Read strobe generated by the host. This signal gates I/O data onto
the bus from the CompactFlashTM Storage Card when the card is configured to
use the I/O interface.
–IORD
(True IDE Mode)
In True IDE Mode, while Ultra DMA mode is not active, this signal has the same
function as in PC Card I/O Mode.
-HDMARDY
(True IDE Mode – In Ultra
DMA Protocol DMA Read)
In True IDE Mode when Ultra DMA mode DMA Read is active, this signal is
asserted by the host to indicate that the host is read to receive Ultra DMA data-
in bursts. The host may negate -HDMARDY to pause an Ultra DMA transfer.
HSTROBE
(True IDE Mode – In Ultra
DMA Protocol DMA
Write)
In True IDE Mode when Ultra DMA mode DMA Write is active, this signal is the
data out strobe generated by the host. Both the rising and falling edge of
HSTROBE cause data to be latched by the device. The host may stop generating
HSTROBE edges to pause an Ultra DMA data-out burst.
–CD1, –CD2
(PC Card Memory Mode)
O
26, 25
These Card Detect pins are connected to ground on the CompactFlashTM Storage
Card. They are used by the host to determine that the CompactFlashTM Storage
Card or is fully inserted into its socket.
–CD1, –CD2
(PC Card I/O Mode)
This signal is the same for all modes.
–CD1, –CD2
(True IDE Mode)
This signal is the same for all modes.
–CE1, –CE2
(PC Card Memory Mode)
I
7, 32
These input signals are used both to select the card and to indicate to the card
whether a byte or a word operation is being performed. –CE2 always accesses
the odd byte of the word.
-CE1 accesses the even byte or the Odd byte of the word depending on A0 and
–CE2. A multiplexing scheme based on A0, -CE1, -CE2 allows 8 bit hosts to
access all data on D0-D7. See Table 31, Table 38, Table 39, Table 40, and
Table 41.
–CE1, –CE2
(PC Card I/O Mode)
This signal is the same as the PC Card Memory Mode signal.
–CS0, –CS1
(True IDE Mode)
In the True IDE Mode, -CS0 is the chip select for the task file registers while –CS1
is used to select the Alternate Status Register and the Device Control Register.
While –DMACK is asserted, -CS0 and –CS1 shall be held negated and the width
of the transfers shall be 16 bits.
–CSEL
(PC Card Memory Mode)
I
39
This signal is not used for this mode, but should be connected by the host to PC
Card A25 or grounded by the host.
–CSEL
(PC Card I/O Mode)
This signal is not used for this mode, but should be connected by the host to PC
Card A25 or grounded by the host.
–CSEL
(True IDE Mode)
This internally pulled up signal is used to configure this device as a Master or a
Slave when configured in the True IDE Mode.
When this pin is grounded, this device is configured as a Master.
When the pin is open, this device is configured as a Slave.
–IOWR
(PC Card Memory Mode)
I
35
This signal is not used in this mode.
–IOWR
(PC Card I/O Mode)
The I/O Write strobe pulse is used to clock I/O data on the Card Data bus into the
CompactFlashTM Storage Card controller registers when the CompactFlashTM
Storage Card is configured to use the I/O interface.
The clocking shall occur on the negative to positive edge of the signal (trailing
edge).
-IOWR
(True IDE Mode – Except
Ultra DMA Protocol
Active)
In True IDE Mode, while Ultra DMA mode protocol is not active, this signal has
the same function as in PC Card I/O Mode.
When Ultra DMA mode protocol is supported, this signal must be negated
before entering Ultra DMA mode protocol.
STOP
(True IDE Mode – Ultra
DMA Protocol Active)
In True IDE Mode, while Ultra DMA mode protocol is active, the assertion of this
signal causes the termination of the Ultra DMA burst.
–OE
(PC Card Memory Mode)
I
9
This is an Output Enable strobe generated by the host interface.
It is used to read data from the CompactFlashTM Storage in Memory Mode and to
read the CIS and configuration registers.
–OE
(PC Card I/O Mode)
In PC Card I/O Mode, this signal is used to read the CIS and configuration
registers.
–ATASEL
(True IDE Mode)
To enable True IDE Mode this input should be grounded by the host.
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Signal Name
Dir.
Pin
Description
READY
(PC Card Memory Mode)
O
37
In Memory Mode, this signal is set high when the CompactFlashTM Storage Card
is ready to accept a new data transfer operation and is held low when the card
is busy.
At power up and at Reset, the READY signal is held low (busy) until the
CompactFlashTM Storage Card has completed its power up or reset function. No
access of any type should be made to the CompactFlashTM Storage Card during
this time.
Note, however, that when a card is powered up and used with RESET
continuously disconnected or asserted, the Reset function of the RESET pin is
disabled. Consequently, the continuous assertion of RESET from the application
of power shall not cause the READY signal to remain continuously in the busy
state.
–IREQ
(PC Card I/O Mode)
I/O Operation – After the CompactFlashTM Storage Card has been configured for
I/O operation, this signal is used as -Interrupt Request. This line is strobed low
to generate a pulse mode interrupt or held low for a level mode interrupt.
INTRQ
(True IDE Mode)
In True IDE Mode signal is the active high Interrupt Request to the host.
–REG
(PC Card Memory Mode)
I
44
This signal is used during Memory Cycles to distinguish between Common
Memory and Register (Attribute) Memory accesses. High for Common Memory,
Low for Attribute Memory.
–REG
(PC Card I/O Mode)
The signal shall also be active (low) during I/O Cycles when the
I/O address is on the Bus.
–DMACK
(True IDE Mode)
This is a DMA Acknowledge signal that is asserted by the host in response to
DMARQ to initiate DMA transfers.
The –DMACK signal must be high except during the execution of DMA
commands. (1)
If DMA operation is not supported by a True IDE Mode only host, this signal
should be driven high or connected to VCC by the host.
A host that does not support DMA mode and implements both
PC card and True-IDE modes of operation need not alter the
PC card mode connections while in True-IDE mode as long as this does not
prevent proper operation all modes.
RESET
(PC Card Memory Mode)
I
41
The CompactFlashTM Storage Card is Reset when the RESET pin is high with the
following important exception:
The host may leave the RESET pin open or keep it continually high from the
application of power without causing a continuous Reset of the card. Under
either of these conditions, the card shall emerge from power-up having
completed an initial Reset.
The CompactFlashTM Card is also Reset when the Soft Reset bit in the Card
Configuration Option Register is set.
RESET
(PC Card I/O Mode)
This signal is the same as the PC Card Memory Mode signal.
–RESET
(True IDE Mode)
In the True IDE Mode, this input pin is the active low hardware reset from the
host.
Vcc
(PC Card Memory Mode)
13, 38
+5V, +3.3V power.
Vcc
(PC Card I/O Mode)
Same for all modes.
Vcc
(True IDE Mode)
Same for all modes.
–VS1, –VS2
(PC Card Memory Mode)
O
33, 40
Voltage Sense Signals. –VS1 is grounded on the Card and sensed by the Host so
that the CompactFlashTM Storage Card CIS can be read at 3.3 volts and –VS2 is
reserved by PCMCIA for a secondary voltage and is not connected on the Card.
–VS1, –VS2
(PC Card I/O Mode)
This signal is the same for all modes.
–VS1, –VS2
(True IDE Mode)
This signal is the same for all modes.
–WAIT
(PC Card Memory Mode)
O
42
The –WAIT signal is driven low by the CompactFlashTM Storage
Card to signal the host to delay completion of a memory or I/O cycle that is in
progress.
–WAIT
(PC Card I/O Mode)
This signal is the same as the PC Card Memory Mode signal.
IORDY
(True IDE Mode – Except
Ultra DMA Mode)
In True IDE Mode, except in Ultra DMA modes, this output signal may be used as
IORDY.
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Signal Name
Dir.
Pin
Description
-DDMARDY
(True IDE Mode – Ultra
DMA Write Mode)
In True IDE Mode, when Ultra DMA mode DMA Write is active, this signal is
asserted by the host to indicate that the device is read to receive Ultra DMA
data-in bursts. The device may negate –DDMARDY to pause an Ultra DMA
transfer.
DSTROBE
(True IDE Mode – Ultra
DMA Read Mode)
In True IDE Mode, when Ultra DMA mode DMA Write is active, this signal is the
data out strobe generated by the device. Both the rising and falling edge of
DSTROBE cause data to be latched by the host. The device may stop generating
DSTROBE edges to pause an Ultra DMA data-out burst.
–WE
(PC Card Memory Mode)
I
36
This is a signal driven by the host and used for strobing memory write data to
the registers of the CompactFlashTM Storage when the card is configured in the
memory interface mode. It is also used for writing the configuration registers.
–WE
(PC Card I/O Mode)
In PC Card I/O Mode, this signal is used for writing the configuration registers.
–WE
(True IDE Mode)
In True IDE Mode, this input signal is not used and should be connected to VCC
by the host.
WP
(PC Card Memory Mode)
O
24
Memory Mode – The CompactFlashTM Storage Card does not have a write protect
switch. This signal is held low after the completion of the reset initialization
sequence.
–IOIS16
(PC Card I/O Mode)
I/O Operation – When the CompactFlashTM Storage Card is configured for I/O
Operation Pin 24 is used for the –I/O Selected is 16 Bit Port (-IOIS16) function. A
Low signal indicates that a 16 bit or odd byte only operation can be performed
at the addressed port.
In PC-Card mode, the IOIS16 signal does not work correctly. If a host uses this
signal, this may result in 16 bit accesses being changed to two 8 bit accesses.
Depending on the address, this may fail. A simple test will show the C-400
compatibility to a certain host. If the C-400 cards can be recognized (Identify
Device and MBR data is read out successfully), then this PC card issue will likely
not affect the operation in this host. (1)
–IOCS16
(True IDE Mode)
In True IDE Mode this output signal is asserted low when this device is
expecting a word data transfer cycle.
1) If you have host-card incompatibilities please contact Swissbit.
5.2 Electrical Specification
Table 12
defines the DC Characteristics for the CompactFlashTM Memory Card. Unless otherwise stated, conditions
are:
Vcc = 5V ± 10%
Vcc = 3.3V ± 10%
0 °C to +85 °C
The card interface is driven with 3.3V. The input pins are 5V tolerant.
The High-Speed IDE lines are terminated with serial resistors as specified in the ATA specification to improve the
signal quality.
Table 12 shows that the Card operates correctly in both the voltage ranges and that the current requirements must
not exceed the maximum limit shown.
The current is measured by connecting an amp meter in series with the Vcc supply. The meter should be set to the
2A scale range, and have a fast current probe with an RC filter with a time constant of 0.1ms. Current
measurements are taken while looping on a data transfer command with a sector count of 128. Current
consumption values for both read and write commands are not to exceed the Maximum Average RMS Current
specified in Table 12.
Table 13 shows the Input Leakage Current, Table 14 the Input Characteristics, Table 15 the Output Drive Type and
Table 16 the Output Drive Characteristics.
Table 12: Absolute Maximum Conditions
Parameter
Symbol
Conditions
Input Power
VCC
-0.3V to 6.5V
Voltage on any pin except VCC with respect to GND
V
-0.5V to 6.5V
Table 13: Input Leakage current (1)
Type
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Units
IxZ
Input Leakage Current
(if not pulled up or down)
IL
VIH =Vcc
-10
10
µA
VIL = GND
IxU
Pull Up Resistor
RPU1
Vcc = 5.0V
50
500
kOhm
IxD
Pull Down Resistor
RPD1
Vcc = 5.0V
50
500
kOhm
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1. x refers to the characteristics described in Table 14 For example, I1U indicates a pull up resistor with a type 1 input
characteristic.
Table 14: Input characteristics
Type
Parameter
Symbol
Min.
Typ.
Max.
Min.
Typ.
Max.
Units
Vcc = 3.3V
Vcc = 5.0V
1
Input Voltage CMOS
VIH
2.0
5.5
2.0
5.5
V
VIL
-0.3
0.8
-0.3
0.8
2
Input Voltage CMOS
VIH
2.0
5.5
2.0
5.5
V
VIL
-0.3
0.8
-0.3
0.8
3
Input Voltage CMOS Schmitt
Trigger
VTH
2.0
5.5
2.0
5.5
V
VTL
-0.3
0.8
-0.3
0.8
Table 15: Output Drive Type (1)
Type
Output Type
Valid Conditions
Otx
Totempole
IOH & IOL
Ozx
Tri-State N-P Channel
IOH & IOL
Opx
P-Channel Only
IOH only
Onx
N-Channel Only
IOL only
1. x refers to the characteristics described in Table 14 For example, OT3 refers to totem pole output with a type 3 output drive
characteristic.
Table 16: Output Drive Characteristics
Type
Parameter
Symbol
Conditions
Min.
Max.
Units
1
Output Voltage
VOH
IOH= -1mA
2.4
V
VOL
IOL = 4mA
0.45
2
Output Voltage
VOH
IOH = -1mA
2.4
V
VOL
IOL = 4mA
0.45
3
Output Voltage
VOH
IOH= -1mA
2.4
V
VOL
IOL = 4mA
0.45
Tri-State
IOZ
VOL= GND
-10
10
µA
X
Leakage Current
VOH = Vcc
5.3 Additional requirements for CompactFlashTM Advanced Timing mode
When operating in a CompactFlashTM Advanced timing mode (PIO5, 6 or MDMA 3, 4), the following conditions must
be respected:
Only one CompactFlashTM Card must be connected to the CompactFlashTM bus.
The load capacitance (cable included) for all signals must be lower than 40pF.
The cable length must be lower than 0.15m (6 inches). The cable length is measured from the Card
connector to the host controller. 0.46m (18 inches) cables are not supported.
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6 Command Interface
There are two types of bus cycles and timing sequences that occur in the PC card type interface, direct mapped I/O
transfer and memory access. Two types of bus cycles are also available in True IDE interface type: PIO transfer and
Multi-Word DMA transfer.
Table 17, Table 18, Table 19, Table 20, Table 21, Table 22, Table 23, and Table 24 show the read and write timing
parameters. Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7, and Figure 8 and Figure 9 show the read and
write timing diagrams.
In order to set the card mode, the –OE (-ATASEL) signal must be set and kept stable before applying VCC until the
reset phase is completed. To place the card in Memory mode or I/O mode, -OE (-ATASEL) must be driven High,
while it must be driven Low to place the card in True IDE mode.
6.1 Attribute Memory Read and Write
Figure 2: Attribute Memory Read waveforms
Table 17: Attribute Memory Read timing
Speed version
300ns
Item
Symbol
IEEEE Symbol
Min. (ns)
Max. (ns)
Read Cycle Time
tcI
tAVAV
250
Address Access Time
ta(A)
tAVQV
250
Card Enable Access Time
ta(CE)
tELQV
250
Output Enable Access Time
ta(OE)
tGLQV
125
Output Disable Time from CE
tdis(CE)
tEHQZ
100
Output Disable Time from OE
tdis(OE)
tGHQZ
100
Output Enable Time from CE
ten(CE)
tELQNZ
5
Output Enable Time from OE
ten(OE)
tGLQNZ
5
Data Valid from Address Change
tv(A)
tAXQX
0
Address Setup Time
tsu(A)
tAVWL
30
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Figure 3: Configuration Register (Attribute Memory) Write waveforms
1 DIN signifies data provided by the system to the CompactFlashTM Card.
Table 18: Configuration Register (Attribute Memory) Write timing
Speed Version
250ns
Item
Symbol
IEEEE Symbol
Min. (ns)
Max. (ns)
Write Cycle Time
tc(W)
tAVAV
250
Write Pulse Width
tw(WE)
tWLWH
150
Address Setup Time
tsu(A)
tAVWL
30
Data Setup Time for WE
tsu(D-WEH)
tDVWH
80
Data Hold Time
th(D)
tWMDX
30
Write Recovery Time
trec(WE)
tWMAX
30
6.2 Common Memory Read and Write
Figure 4: Common Memory Read waveforms
1 DOUT means data provided by the CompactFlashTM Memory Card to the system.
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Table 19: Common Memory Read timing (1)
1 Swissbit CF does not assert the WAIT signal.
Figure 5: Common Memory Write Waveforms
Table 20: Common Memory Write Timing(1)
Cycle Time Mode
250ns
120ns
100ns
80ns
Item
Symbol
IEEEE
Symbol
Min
(ns)
Max
(ns)
Min
(ns)
Max
(ns)
Min
(ns)
Max
(ns)
Min
(ns)
Max
(ns)
Data Setup before WE
tsu(D-WEH)
tDVWH
80
50
40
30
Data Hold following WE
th(D)
tIWMDX
30
15
10
10
WE Pulse Width
tw(WE)
tWLWH
150
70
60
55
Address Setup Time
tsu(A)
tAVWL
30
15
10
10
CE Setup before WE
tsu(CE)
tELWL
0
0
0
0
Write Recovery Time
trec(WE)
tWMAX
30
15
15
15
Address Hold Time
th(A)
tGHAX
20
15
15
10
CE Hold following WE
th(CE)
tGHEH
20
15
15
10
1 Swissbit CF does not assert the WAIT signal.
Cycle Time Mode
250ns
120ns
100ns
80ns
Item
Symbol
IEEEE
Symbol
Min
(ns)
Max
(ns)
Min
(ns)
Max
(ns)
Min
(ns)
Max
(ns)
Min
(ns)
Max
(ns)
Output Enable Access Time
ta(OE)
tGLQV
125
60
50
45
Output Disable Time from OE
tdis(OE)
tGHQZ
100
60
50
45
Address Setup Time
tsu(A)
tAVGL
30
15
10
10
Address Hold Time
th(A)
tGHAX
20
15
15
10
CE Setup before OE
tsu(CE)
tELGL
0
0
0
0
CE Hold following OE
th(CE)
tGHEH
20
15
15
10
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6.3 I/O Read and Write
Figure 6: I/O Read waveforms
1 DOUT signifies data provided by the CompactFlashTM Memory Card or to the system.
Table 21: I/O Read timing(1)
Cycle Time Mode
250ns
120ns
100ns
80ns
Item
Symbol
IEEEE
Symbol
Min
(ns)
Max
(ns)
Min
(ns)
Max
(ns)
Min
(ns)
Max
(ns)
Min
(ns)
Max
(ns)
Data Delay after IORD
td(IORD)
tIGLQV
100
50
50
45
Data Hold following IORD
th(IORD)
tIGHQX
0
5
5
5
IORD Width Time
tw(IORD)
tIGLIGH
165
70
65
55
Address Setup before IORD
tsuA(IORD)
tAVIGL
70
25
25
15
Address Hold following IORD
thA(IORD)
tIGHAX
20
10
10
10
CE setup before IORD
tsuCE(IORD)
tELIGL
5
5
5
5
CE Hold following IORD
thCE(IORD)
tIGHEH
20
10
10
10
REG setup before IORD
tsuREG(IORD)
tRGLIGL
5
5
5
5
REG Hold following IORD
thREG(IORD)
tIGHRGH
0
0
0
0
INPACK Delay Falling from
IORD
tdfINPACK(IORD)
tIGLIAL
0
45
0
NA(2)
0
NA(2)
0
NA(2)
NPACK Delay Rising from IORD
tdrINPACK(IORD)
tIGHIAH
45
NA(2)
NA(2)
NA(2)
IOIS16 Delay Falling from
Address
tdfIOIS16(ADR)
tAVISL
35
IOIS16 Delay Rising from
Address
tdrIOIS16(ADR)
tAVISH
35
1. This Swissbit CF card does not assert the WAIT signal.
2. –IOIS16 is not supported in this mode.
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Figure 7: I/O Write waveforms
Table 22: I/O write timing
Cycle Time Mode
250ns
120ns
100ns
80ns
Item
Symbol
IEEEE
Symbol
Min
(ns)
Max
(ns)
Min
(ns)
Max
(ns)
Min
(ns)
Max
(ns)
Min
(ns)
Max
(ns)
Data Setup before IOWR
tsu(IOWR)
tDVIWH
60
20
20
15
Data Hold following IOWR
th(IOWR)
tIWHDX
30
10
5
5
IOWR Width Time
tw(IOWR)
tIWLIWH
165
70
65
55
Address Setup before IOWR
tsuA(IOWR)
tAVIWL
70
25
25
15
Address Hold following IOWR
thA(IOWR)
tIWHAX
20
20
10
10
CE setup before IOWR
tsuCE(IOWR)
tELIWL
5
5
5
5
CE Hold following IOWR
thCE(IOWR)
tIWHEH
20
20
10
10
REG setup before IOWR
tsuREG(IOWR)
tRGLIWL
5
5
5
5
REG Hold following IOWR
thREG(IOWR)
tIWHRGH
0
0
0
0
IOIS16 Delay Falling from Addr.
tdfIOIS16(ADR)
tAVISL
35
NA(2)
NA(2)
NA(2)
IOIS16 Delay Rising from Addr.
tdrIOIS16(ADR)
tAVISH
35
NA(2)
NA(2)
NA(2)
1. DIN signifies data provided by the system to the CompactFlashTM Memory Card.
2. –IOIS16 and –INPACK are not supported in this mode.
6.4 True IDE Mode
The timing waveforms for True IDE mode and True IDE DMA mode of operation in this section are drawn using the
conventions in the ATA-4 specification, which are different than the conventions used in the PCMCIA specification
and earlier versions of this specification. Signals are shown with their asserted state as High regardless of
whether the signal is actually negative or positive true. Consequently, the –IORD, the
-IOWR and the –IOCS16 signals are shown in the waveforms inverted from their electrical states on the bus.
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Figure 8: True IDE PIO mode Read/Write waveforms
1. The device addresses consists of –CS0, −CS1, and A2-A0.
2. The Data I/O consist of D15-D0 (16-bit) or D7-D0 (8 bit).
3. –IOCS16 is shown for PIO modes 0, 1 and 2. For other modes, this signal is ignored.
Table 23: True IDE PIO mode Read/Write timing (1)
Parameter
Symbol
Mode 0
(ns)
1
(ns)
2
(ns)
3
(ns)
4
(ns)
5(5)
(ns)
6(5)
(ns)
Cycle time (min)
t0(2)
600
383
240
180
120
100
80
Address Valid to –IORD/-IOWR setup (min)
t1
70
50
30
30
25
15
10
-IORD/-IOWR (min)
t2(2)
165
125
100
80
70
65
55
-IORD/-IOWR (min) Register (8 bit)
t2(2)
290
290
290
80
70
65
55
-IORD/-IOWR recovery time (min)
t2i(2)
-
-
-
70
25
25
20
-IOWR data setup (min)
t3
60
45
30
30
20
20
15
-IOWR data hold (min)
t4
30
20
15
10
10
5
5
-IORD data setup (min)
t5
50
35
20
20
20
15
10
-IORD data hold (min)
t6z(3)
5
5
5
5
5
5
5
-IORD data tri-state (max)
t7(4)
30
30
30
30
30
20
20
Address valid to –IOCS16 assertion (max)
t8(4)
90
50
40
NA
NA
NA
NA
Address valid to –IOCS16 released (max)
t7
60
45
30
NA
NA
NA
NA
-IORD/-IOWR to address valid hold
t9
20
15
10
10
10
10
10
1. The maximum load on –IOCS16 is 1 LSTTL with a 50pF total load.
2. t0 is the minimum total cycle time, t2 is the minimum command active time, and t2i is the minimum command recovery time or
command inactive time. The actual cycle time equals the sum of the actual command inactive time. The three timing requirements
of t0, t2, and t2i have to be met. The requirement is greater than the sum of t2 and t2i. This means a host implementation can ensure
that t0 is equal to or greater than the value reported in the devices identify drive Card implementation should support any legal
host implementation.
3. This parameter specifies the time from the falling edge of –IORD to the moment when the CompactFlashTM Memory Card (tri-state).
4. t7 and t8 apply only to modes 0, 1 and 2. The –IOCS16 signal is not valid for other modes.
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Figure 9: True IDE Multi-Word DMA Mode Read/Write waveforms
Table 24: True IDE Multi-Word DMA Mode Read/Write timing
Parameter
Symbol
Mode 0
(ns)
1
(ns)
2
(ns)
3
(ns)
4
(ns)
Cycle time (min)
t0(1)
480
150
120
100
80
-IORD / -IOWR asserted width (min)
tD(1)
215
80
70
65
55
-IORD data access (max)
tE
150
60
50
50
45
-IORD data hold (min)
tF
5
5
5
5
5
-IORD/-IOWR data setup (min)
tG
100
30
20
15
10
-IOWR data hold (min)
tH
20
15
10
5
5
DMACK to –IORD/-IOWR setup (min)
tI
0
0
0
0
0
-IORD / -IOWR to –DMACK hold (min)
tJ
20
5
5
5
5
-IORD Low width (min)
tKR(1)
50
50
25
25
20
-IOWR Low width (min)
tKW(1)
215
50
25
25
20
-IORD to DMARQ delay (max)
tLR
120
40
35
35
35
-IOWR to DMARQ delay (max)
tLW
40
40
35
35
35
CS(1:0) valid to –IORD / -IOWR (min)
tM
50
30
25
10
5
CS(1:0) hold (min)
tN
15
10
10
10
10
-DMACK (max)
tZ
20
25
25
25
25
1. t0 is the minimum total cycle time. TD is the minimum command active time. TKR and tKW are the minimum command recovery time
or command inactive time for input and output cycles, respectively. The actual cycle time is the sum of the actual command active
time and the actual command inactive time. The timing requirements of t0, tD, tKR, and tKW must be respected. T0 is higher than tD +
tKR or tD + tKW, for input and output cycles respectively. This means the host can lengthen either tD or tKR/tKW, or both, to ensure
that t0 is equal to or higher than the value reported in the devices identify device data. A CompactFlashTM Storage Card
implementation shall support any legal host implementation.
6.5 Ultra DMA Mode
6.5.1 Ultra DMA Overview
Ultra DMA is an optional data transfer protocol used with the READ DMA, and WRITE DMA, commands. When this
protocol is enabled, the Ultra DMA protocol shall be used instead of the Multiword DMA protocol when these
commands are issued by the host. This protocol applies to the Ultra DMA data burst only. When this protocol is
used there are no changes to other elements of the ATA protocol (e.g., Command Block Register access).
Ultra DMA operations can take place in any of the three basic interface modes: PC Card Memory mode, PC Card I/O
mode, and True IDE (the original mode to support UDMA). The usage of signals in each of the modes is shown in
Table 25.
–DMARQ
–DMACK
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Table 25: Ultra DMA Signal Usage in Each Interface Mode
UDMA Signal
Type
Pin # (Non UDMA
MEM MODE)
PC CARD MEM
MODE UDMA
PC CARD IO
MODE UDMA
TRUE IDE MODE
UDMA
DMARQ
Output
43 (-INPACK)
-DMARQ
-DMARQ
DMARQ
DMACK
Input
44 (-REG)
-DMACK
DMACK
-DMACK
STOP
Input
35 (-IOWR)
STOP 1
STOP 1
STOP 1
HDMARDYI
HSTROBE(W)
Input
34 (-IORD)
-HDMARDYI 1, 2
HSTROBE(W) 1, 3, 4
-HDMARDYI 1, 2
HSTROBE(W) 1, 3, 4
-HDMARDYI 1, 2
HSTROBE(W) 1, 3, 4
DDMARDY(W)
DSTROBEI
Output
42 (-WAIT)
-DDMARDY(W) 1, 3
DSTROBEI 1. 2. 4
-DDMARDY(W) 1, 3
DSTROBEI 1. 2. 4
-DDMARDY(W) 1, 3
DSTROBEI 1. 2. 4
DATA
Bidir
(D[15:0])
D[15:0]
D[15:0]
D[15:0]
ADDRESS
Input
(A[10:0])
A[10:0]
A[10:0]
A[02:0] 5
CSEL
Input
39 (-CSEL)
-CSEL
-CSEL
-CSEL
INTRQ
Output
37 (READY)
READY
-INTRQ
INTRQ
Card Select
Input
7 (-CE1)
31 (-CE2)
-CE1
-CE2
-CE1
-CE2
-CS0
-CS1
Notes:
1. The UDMA interpretation of this signal is valid only during an Ultra DMA data burst.
2. The UDMA interpretation of this signal is valid only during and Ultra DMA data burst during a DMA Read
command.
3. The UDMA interpretation of this signal is valid only during an Ultra DMA data burst during a DMA Write
command.
4. The HSTROBE and DSTROBE signals are active on both the rising and the falling edge.
5. Address lines 03 through 10 are not used in True IDE mode.
Several signal lines are redefined to provide different functions during an Ultra DMA burst. These lines assume
these definitions when:
1. an Ultra DMA mode is selected, and
2. a host issues a READ DMA, or a WRITE DMA command requiring data transfer, and
3. the device asserts (-)DMARQ, and
4. the host asserts –DMACK.
These signal lines revert back to the definitions used for non-Ultra DMA transfers upon the negation of –DMACK by
the host at the termination of an Ultra DMA burst.
With the Ultra DMA protocol, the STROBE signal that latches data from D[15:0] is generated by the same agent
(either host or device) that drives the data onto the bus. Ownership of D[15:0] and this data strobe signal are
given either to the device during an Ultra DMA data-in burst or to the host for an Ultra DMA data-out burst.
During an Ultra DMA burst a sender shall always drive data onto the bus, and, after a sufficient time to allow for
propagation delay, cable settling, and setup time, the sender shall generate a STROBE edge to latch the data.
Both edges of STROBE are used for data transfers so that the frequency of STROBE is limited to the same frequency
as the data.
Words in the IDENTIFY DEVICE data indicate support of the Ultra DMA feature and the Ultra DMA modes the device is
capable of supporting. The Set transfer mode subcommand in the SET FEATURES command shall be used by a host
to select the Ultra DMA mode at which the system operates. The Ultra DMA mode selected by a host shall be less
than or equal to the fastest mode of which the device is capable. Only one Ultra DMA mode shall be selected at
any given time. All timing requirements for a selected Ultra DMA mode shall be satisfied. Devices supporting any
Ultra DMA mode shall also support all slower Ultra DMA modes.
An Ultra DMA capable device shall retain the previously selected Ultra DMA mode after executing a software reset
sequence or the sequence caused by receipt of a DEVICE RESET command if a SET FEATURES disable reverting to
defaults command has been issued. The device may revert to a Multiword DMA mode if a SET FEATURES enable
reverting to default has been issued. An Ultra DMA capable device shall clear any previously selected Ultra DMA
mode and revert to the default non-Ultra DMA modes after executing a power-on or hardware reset.
Both the host and device perform a CRC function during an Ultra DMA burst. At the end of an Ultra DMA burst the
host sends its CRC data to the device. The device compares its CRC data to the data sent from the host. If the two
values do not match, the device reports an error in the error register. If an error occurs during one or more Ultra
DMA bursts for any one command, the device shall report the first error that occurred. If the device detects that a
CRC error has occurred before data transfer for the command is complete, the device may complete the transfer
and report the error or abort the command and report the error.
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NOTE – If a data transfer is terminated before completion, the assertion of INTRQ should be passed through to the
host software driver regardless of whether all data requested by the command has been transferred.
6.5.2 Restrictions and Considerations during Ultra DMA Commands
There are number of important restrictions and considerations for the implementation and use of Ultra DMA
commands in CompactFlashTM devices. These are highlighted in the subsections below.
Additional restrictions on specific modes of operation are given in sections 5.3 and 6.5.3
6.5.2.1 System Restrictions for Ultra DMA modes 3 and above
Ultra DMA modes 3 and above are valid only for systems that meet the requirements of section 5.3
6.5.2.2 UDMA Address and Card Enable Signals
The Card Enable signals (-CE1 / -CS0 and –CE2 / -CS1) shall remain negated during Ultra DMA data bursts.
The Address bus (A[10:0]) shall not transition unnecessarily during the UDMA command and shall remain fixed
during an Ultra DMA data burst. In True IDE mode, the address lines (A[2:0]) shall be held to all zeros. This will
reduce unnecessary noise during the UDMA command.
6.5.2.3 Task File registers shall not be written during an Ultra DMA command
The task file registers shall not be written after an Ultra DMA command is issued by the host and before the
command completes. Writing to the device control register is permitted between bursts, but is expected to occur
only to reset the card after an unrecoverable protocol error.
6.5.2.4 Ultra DMA transfers shall be 16 bits wide
All transfers during an Ultra DMA data burst are 16 bit wide transfers. The Set Features command that controls the
bus width for PIO transfers does not affect the width of Ultra DMA transfers.
6.5.2.5 No Access to Memory or I/O Space during an Ultra DMA Data Burst
No access to common or attribute memory or to I/O space on the device is permitted during an Ultra DMA data
burst.
6.5.3 Specific rules for PC Card Memory Mode Ultra DMA
In addition to the general restrictions for all Ultra DMA operations, these additional considerations exist for PC
Card Memory Mode Ultra DMA operations.
6.5.3.1 No Access to Attribute Memory during PC Card Memory Mode DMA Commands
The host shall not attempt to access Attribute Memory space during a PC Card Memory Mode DMA command either
before, between or within Ultra DMA data bursts.
6.5.3.2 READY signal handling during DMA commands in PC Card Memory Mode
In PC Card Memory Mode, the READY signal shall be negated (made BUSY) by the device upon receipt of a DMA
command and shall remain negated until the command has completed at which time it shall be re-asserted.
This treatment allows the host to receive a single interrupt at the end of the command and avoids the extra
overhead that would be associated with processing busy to ready transitions for each sector transferred as is the
case when the READY toggles at the end of every sector of PIO Memory Mode transfers.
The BSY bit in the status register is permitted to be negated in the status register at any time that the DRQ bit in
the status register is asserted. The only restriction is that either DRQ or BSY or both must remain asserted while
the command is in progress.
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6.5.4 Ultra DMA Phases of Operation
An Ultra DMA data transfer is accomplished through a series of Ultra DMA data-in or data-out bursts. Each Ultra
DMA burst has three mandatory phases of operation: the initiation phase, the data transfer phase, and the Ultra
DMA burst termination phase. In addition, an Ultra DMA burst may be paused during the data transfer phase (see:
6.5.4.4 , for the detailed protocol descriptions for each of these phases. Table 26: Ultra DMA Data Burst Timing
Requirements and Table 27: Ultra DMA Data Burst Timing Descriptions define the specific timing requirements). In
the following rules –DMARDY is used in cases that could apply to either –DDMARDY or –HDMARDY, and STROBE is
used in cases that could apply to either DSTROBE or HSTROBE. The following are general Ultra DMA rules.
1. An Ultra DMA burst is defined as the period from an assertion of –DMACK by the host to the subsequent
negation of –DMACK.
2. When operating in Ultra DMA modes 2, 1, or 0 a recipient shall be prepared to receive up to two data
words whenever an Ultra DMA burst is paused. When operating in Ultra DMA modes 6, 5, 4, or 3 a
recipient shall be prepared to receive up to three data words whenever an Ultra DMA burst is paused.
6.5.4.1 Ultra DMA Burst Initiation Phase Rules
1. An Ultra DMA burst initiation phase begins with the assertion of DMARQ by a device and ends when the
sender generates a STROBE edge to transfer the first data word.
2. An Ultra DMA burst shall always be requested by a device asserting DMARQ.
3. When ready to initiate the requested Ultra DMA burst, the host shall respond by asserting –DMACK.
4. A host shall never assert –DMACK without first detecting that DMARQ is asserted.
5. For Ultra DMA data-in bursts: a device may begin driving D[15:00] after detecting that –DMACK is asserted,
STOP negated, and –HDMARDY is asserted.
6. After asserting DMARQ or asserting –DDMARDY for an Ultra DMA data-out burst, a device shall not negate
either signal until the first STROBE edge is generated.
7. After negating STOP or asserting –HDMARDY for an Ultra DMA data-in burst, a host shall not change the
state of either signal until the first STROBE edge is generated.
6.5.4.2 Ultra DMA Data transfer phase rules
1. The data transfer phase is in effect from after Ultra DMA burst initiation until Ultra DMA burst termination.
2. A recipient pauses an Ultra DMA burst by negating –DMARDY and resumes an Ultra DMA burst by
reasserting –DMARDY.
3. A sender pauses an Ultra DMA burst by not generating STROBE edges and resumes by generating STROBE
edges.
4. A recipient shall not signal a termination request immediately when the sender stops generating STROBE
edges. In the absence of a termination from the sender the recipient shall always negate –DMARDY and
wait the required period before signaling a termination request.
5. A sender may generate STROBE edges at greater than the minimum period specified by the enabled Ultra
DMA mode. The sender shall not generate STROBE edges at less than the minimum period specified by the
enabled Ultra DMA mode. A recipient shall be able to receive data at the minimum period specified by the
enabled Ultra DMA mode.
6.5.4.3 Ultra DMA Burst Termination Phase Rules
1. Either a sender or a recipient may terminate an Ultra DMA burst.
2. Ultra DMA burst termination is not the same as command completion. If an Ultra DMA burst termination
occurs before command completion, the command shall be completed by initiation of a new Ultra DMA
burst at some later time or aborted by the host issuing a hardware or software reset or DEVICE RESET
command if implemented by the device.
3. An Ultra DMA burst shall be paused before a recipient requests a termination.
4. A host requests a termination by asserting STOP. A device acknowledges a termination request by
negating DMARQ.
5. A device requests a termination by negating DMARQ. A host acknowledges a termination request by
asserting STOP.
6. Once a sender requests a termination, the sender shall not change the state of STROBE until the recipient
acknowledges the request. Then, if STROBE is not in the asserted state, the sender shall return STROBE to
the asserted state. No data shall be transferred on this transition of STROBE.
7. A sender shall return STROBE to the asserted state whenever the sender detects a termination request
from the recipient. No data shall be transferred nor CRC calculated on this edge of DSTROBE.
8. Once a recipient requests a termination, the responder shall not change DMARDY from the negated state
for the remainder of an Ultra DMA burst.
9. A recipient shall ignore a STROBE edge when DMARQ is negated or STOP is asserted.
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6.5.4.4 Ultra DMA Data Transfers Timing
Table 26 and Table 27 define the timings associated with all phases of Ultra DMA bursts.
Table 26: Ultra DMA Data Burst Timing Requirements
Name
UDMA
Mode 0
(ns)
UDMA
Mode 1
(ns)
UDMA
Mode 2
(ns)
UDMA
Mode 3
(ns)
UDMA
Mode 4
(ns)
UDMA
Mode 5
(ns)
UDMA
Mode 6
(ns)
Measurement
location
(See Note 2)
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
t2CYCTYP
240
160
120
90
60
40
24
Sender
tCYC
112
73
54
39
25
16.8
13
Note 3
t2CYC
230
153
115
86
57
38
29
Sender
tDS
15.0
10.0
7.0
7.0
5.0
4.0
2.6
Recipient
tDH
5.0
5.0
5.0
5.0
5.0
4.6
3.5
Recipient
tDVS
70.0
48.0
31.0
20.0
6.7
4.8
4.0
Sender
tDVH
6.2
6.2
6.2
6.2
6.2
4.8
4.0
Sender
tCS
15.0
10.0
7.0
7.0
5.0
5.0
5.0
Device
tCH
5.0
5.0
5.0
5.0
5.0
5.0
5.0
Device
tCVS
70.0
48.0
31.0
20.0
6.7
10.0
10.0
Host
tCVH
6.2
6.2
6.2
6.2
6.2
10.0
10.0
Host
tZFS
0
0
0
0
0
35
25
Device
tDZFS
70.0
48.0
31.0
20.0
6.7
25.0
17.5
Sender
tFS
230
200
170
130
120
90
80
Device
tLI
0
150
0
150
0
150
0
100
0
100
0
75
0
60
Note 4
tMLI
20
20
20
20
20
20
20
Host
tUI
0
0
0
0
0
0
0
Host
tAZ
10
10
10
10
10
10
10
Note 5
tZAH
20
20
20
20
20
20
20
Host
tZAD
0
0
0
0
0
0
0
Device
tENV
20
70
20
70
20
70
20
55
20
55
20
50
20
50
Host
tRFS
75
70
60
60
60
50
50
Sender
tRP
160
125
100
100
100
85
85
Recipient
tIORDYZ
20
20
20
20
20
20
20
Device
tZIORDY
0
0
0
0
0
0
0
Device
tACK
20
20
20
20
20
20
20
Host
tSS
50
50
50
50
50
50
50
Sender
Notes:
1. All timing measurement switching points (low to high and high to low) shall be taken at 1.5 V.
2. All signal transitions for a timing parameter shall be measured at the connector specified in the
measurement location column. For example, in the case of tRFS, both STROBE and –DMARDY transitions
are measured at the sender connector.
3. The parameter tCYC shall be measured at the recipient’s connector farthest from the sender.
4. The parameter tLI shall be measured at the connector of the sender or recipient that is responding to an
incoming transition from the recipient or sender respectively. Both the incoming signal and the outgoing
response shall be measured at the same connector.
5. The parameter tAZ shall be measured at the connector of the sender or recipient that is driving the bus but
must release the bus the allow for a bus turnaround.
6. See the AC Timing requirements in Table 27: Ultra DMA Data Burst Timing Descriptions.
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Table 27: Ultra DMA Data Burst Timing Descriptions
Name
Comment
Notes
t2CYCTYP
Typical sustained average two cycle time
tCYC
Cycle time allowing for asymmetry and clock variations (from STROBE edge to STROBE edge)
t2CYC
Two cycle time allowing for clock variations (from rising edge to next rising edge or from
falling edge to next falling edge of STROBE)
tDS
Data setup time at recipient (from data valid until STROBE edge)
2, 5
tDH
Data hold time at recipient (from STROBE edge until data may become invalid)
2, 5
tDVS
Data valid setup time at sender (from data valid until STROBE edge)
3
tDVH
Data valid hold time at sender (from STROBE edge until data may become invalid)
3
tCS
CRC word setup time at device
2
tCH
CRC word hold time device
2
tCVS
CRC word valid setup time at host (from CRC valid until –DMACK negation)
3
tCVH
CRC word valid hold time at sender (from –DMACK negation until CRC may become invalid)
3
tZFS
Time from STROBE output released-to-driving until the first transition of critical timing.
TDZFS
Time from data output released-to-driving until the first transition of critical timing.
TFS
First STROBE time (for device to first negate DSTROBE from STOP during a data in burst)
tLI
Limited interlock time
1
tMLI
Interlock time with minimum
1
tUI
Unlimited interlock time
1
tAZ
Maximum time allowed for output drivers to release (from asserted or negated)
tZAH
Minimum delay time required for output
tZAD
drivers to assert or negate (from released)
tENV
Envelope time (from –DMACK to STOP and –HDMARDY during data in burst initiation and
from DMACK to STOP during data out burst initiation)
tRFS
Ready-to-final-STROBE time (no STROBE edges shall be sent this long after negation of
-DMARDY)
tRP
Ready-to-pause time (that recipient shall wait to pause after negating –DMARDY)
tIORDYZ
Maximum time before releasing IORDY
tZIORDY
Minimum time before driving IORDY
4
tACK
Setup and hold times for –DMACK (before assertion or negation)
tSS
Time from STROBE edge to negation of DMARQ or assertion of STOP (when sender terminates
a burst)
Notes:
1. The parameters tUI, tMLI (in Figure 13: Ultra DMA Data-In Burst Device Termination Timing and Figure 14:
Ultra DMA Data-In Burst Host Termination Timing), and tLI indicate sender-to-recipient or recipient-to-
sender interlocks, i.e., one agent (either sender or recipient) is waiting for the other agent to respond
with a signal before proceeding. TUI is an unlimited interlock that has no maximum time value. TMLI is a
limited time-out that has a defined minimum. TLI is a limited time-out that has a defined maximum.
2. 80-conductor cabling shall be required in order to meet setup (tDS, tCS) and hold (tDH, tCH) times in modes
greater than 2.
3. Timing for tDVS, tDVH, tCVS and tCVH shall be met for lumped capacitive loads of 15 and 40 pF at the connector
where the Data and STROBE signals have the same capacitive load value. Due to reflections on the cable,
these timing measurements are not valid in a normally functioning system.
4. For all modes the parameter tZIORDY may be greater than tENV due to the fact that the host has a pull-up on
IORDY- giving it a known state when released.
5. The parameters tDS, and tDH for mode 5 are defined for a recipient at the end of the cable only in a
configuration with a single device located at the end of the cable. This could result in the minimum
values for tDS and tDH for mode 5 at the middle connector being 3.0 and 3.9 ns respectively.
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Table 28: Ultra DMA Sender and Recipient IC Timing Requirements
Name
Comments
UDMA
Mode 0
(ns)
UDMA
Mode 1
(ns)
UDMA
Mode 2
(ns)
UDMA
Mode 3
(ns)
UDMA
Mode4
(ns)
UDMA
Mode 5
(ns)
UDMA
Mode6
(ns)
Min
Min
Min
Min
Min
Min
Min
tDSIC
Recipient IC data setup time (from
data valid until STROBE edge)
(see note 2)
14.7
9.7
6.8
6.8
4.8
2.3
2.3
tDHIC
Recipient IC data hold time (from
STROBE edge until data may
become invalid) (see note 2)
4.8
4.8
4.8
4.8
4.8
2.8
2.8
tDVSIC
Sender IC data valid setup time
(from data valid until STROBE
edge) (see note 3)
72.9
50.9
33.9
22.6
9.5
6.0
5.2
tDVHIC
Sender IC data valid hold time
(from STROBE edge until data
may become invalid) (see note 3)
9.0
9.0
9.0
9.0
9.0
6.0
5.2
Notes:
1. All timing measurement switching points(low to high and high to low) shall be taken at 1.5 V.
2. The correct data value shall be captured by the recipient given input data with a slew rate of 0.4 V/ns rising and falling
and the input STROBE with a slew rate of 0.4 V/ns rising and falling at tDSIC and tDHIC timing (as measured through 1.5
V).
3. The parameters tDVSIC and tDVHIC shall be met for lumped capacitive loads of 15 and 40 pF at the IC where all signals
have the same capacitive load value. Noise that may couple onto the output signals from external sources has not been
included in these values.
Table 29: Ultra DMA AC Signal Requirements
Name
Comment
Min
[V/ns]
Max
[V/ns]
Notes
SRISE
Rising Edge Slew Rate for any signal
1.25
1
SFALL
Falling Edge Slew Rate for any signal
1.25
1
Note:
1. The sender shall be tested while driving an 18 inch long, 80 conductor cable with PVC insulation material. The signal
under test shall be cut at a test point so that it has not trace, cable or recipient loading after the test point. All other
signals should remain connected through to the recipient. The test point may be located at any point between the
sender’s series termination resistor and one half inch or less of conductor exiting the connector. If the test point is on
a cable conductor rather than the PCB, an adjacent ground conductor shall also be cut within one half inch of the
connector.
The test load and test points should then be soldered directly to the exposed source side connectors. The test loads
consist of a 15 pF or a 40 pF, 5%, 0.08 inch by 0.05 inch surface mount or smaller size capacitor from the test point to
ground. Slew rates shall be met for both capacitor values.
Measurements shall be taken at the test point using a <1 pF, >100 kOhm, 1 GHz or faster probe and a 500 MHz or
faster oscilloscope. The average rate shall be measured from 20% to 80% of the settled VOH level with data
transitions at least 120 ns apart. The settled VOH level shall be measured as the average output high level under the
defined testing conditions from 100 nsec after 80% of a rising edge until 20% of the subsequent falling edge.
6.5.4.4.1 Initiating an Ultra DMA Data-In Burst
a) An Ultra DMA Data-In burst is initiated by following the steps lettered below. The timing diagram is
shown in Figure 10: Ultra DMA Data-In Burst Initiation Timing. The associated timing parameters are
specified in Table 26: Ultra DMA Data Burst Timing Requirements and are described in Table 27: Ultra DMA
Data Burst Timing Descriptions.
b) The following steps shall occur in the order they are listed unless otherwise specifically allowed:
c) The host shall keep –DMACK in the negated state before an Ultra DMA burst is initiated.
d) The device shall assert DMARQ to initiate an Ultra DMA burst. After assertion of DMARQ the device shall not
negate DMARQ until after the first negation of DSTROBE.
e) Steps I, (d), and (e) may occur in any order or at the same time. The host shall assert STOP.
f) The host shall negate –HDMARDY.
g) The host shall negate –CS0, -CS1, A2, A1, and A0. The host shall keep –CS0, -CS1, A2, A1, and A0 negated
until after negating –DMACK at the end of the burst.
h) Steps I, (d), and (e) shall have occurred at least tACK before the host asserts –DMACK. The host shall keep –
DMACK asserted until the end of an Ultra DMA burst.
i) The host shall release D[15:0] within tAZ after asserting –DMACK.
j) The device may assert DSTROBE tZIORDY after the host has asserted –DMACK. Once the device has driven
DSTROBE the device shall not release DSTROBE until after the host has negated –DMACK at the end of an
Ultra DMA burst.
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k) The host shall negate STOP and assert –HDMARDY within tENV after asserting –DMACK. After negating STOP
and asserting –HDMARDY, the host shall not change the state of either signal until after receiving the first
transition of DSTROBE from the device (i.e., after the first data word has been received).
l) The device shall drive D[15:00] no sooner than tZAD after the host has asserted –DMACK, negated STOP, and
asserted –HDMARDY.
m) The device shall drive the first word of the data transfer onto D[15:0]. This step may occur when the
device first drives D[15:0] in step (j).
n) To transfer the first word of data the device shall negate DSTROBE within tFS after the host has negated
STOP and asserted –HDMARDY. The device shall negate DSTROBE no sooner than tDVS after driving the first
word of data onto D[15:0].
Figure 10: Ultra DMA Data-In Burst Initiation Timing
Notes: The definitions for the IORDY:-DDMARDY:DSTROBE, -IORD: -HDMARDY:HSTROBE, and –IOWR:STOP signal lines
are not in effect until DMARQ and –DMACK are asserted.
6.5.4.4.2 Sustaining an Ultra DMA Data-In Burst
An Ultra DMA Data-In burst is sustained by following the steps lettered below. The timing diagram is shown in
Figure 11: Sustained Ultra DMA Data-In Burst Timing. The timing parameters are specified in Table 26: Ultra DMA
Data Burst Timing Requirements and are described in Table 27: Ultra DMA Data Burst Timing Descriptions.
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The following steps shall occur in the order they are listed unless otherwise specifically allowed:
a) The device shall drive a data word onto D[15:0].
b) The device shall generate a DSTROBE edge to latch the new word no sooner than tDVS after changing the
state of D[15:0]. The device shall generate a DSTROBE edge no more frequently than tCYC for the selected
Ultra DMA mode. The device shall not generate two rising or two falling DSTROBE edges more frequently
than 2tcyc for the selected Ultra DMA mode.
c) The device shall not change the state of D[15:0] until at least tDVH after generating a DSTROBE edge to
latch the data.
d) The device shall repeat steps (a), (b), and (c) until the data transfer is complete or an Ultra DMA burst is
paused, whichever occurs first.
Figure 11: Sustained Ultra DMA Data-In Burst Timing
Notes: D[15:0] and DSTROBE signals are shown at both the host and the device to emphasize that cable settling
time as well as cable propagation delay shall not allow the data signals to
be considered stable at the host until some time after they are driven by the device.
6.5.4.4.3 Host Pausing an Ultra DMA Data-In Burst
The host pauses a Data-In burst by following the steps lettered below. A timing diagram is shown in Figure 12:
Ultra DMA Data-In Burst Host Pause Timing. The timing parameters are specified in Table 26: Ultra DMA Data Burst
Timing Requirements and are described in Table 27: Ultra DMA Data Burst Timing Descriptions.
The following steps shall occur in the order they are listed unless otherwise specifically allowed:
a) The host shall not pause an Ultra DMA burst until at least one data word of an Ultra DMA burst has been
transferred.
b) The host shall pause an Ultra DMA burst by negating –HDMARDY.
c) The device shall stop generating DSTROBE edges within tRFS of the host negating –HDMARDY.
d) If the host negates –HDMARDY within tSR after the device has generated a DSTROBE edge, then the host
shall be prepared to receive zero or one additional data words. If the host negates –HDMARDY greater
than tSR after the device has generated a DSTROBE edge, then the host shall be prepared to receive zero,
one or two additional data words. The additional data words are a result of cable round trip delay and tRFS
timing for the device.
e) The host shall resume an Ultra DMA burst by asserting –HDMARDY.
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Figure 12: Ultra DMA Data-In Burst Host Pause Timing
Notes:
1. The host may assert STOP to request termination of the Ultra DMA burst no sooner than tRP after –HDMARDY is
negated.
2. After negating –HDMARDY, the host may receive zero, one, two, or three more data words from the device.
6.5.4.4.4 Device Terminating an Ultra DMA Data-In Burst
The device terminates an Ultra DMA Data-In burst by following the steps lettered below. The timing diagram is
shown in Figure 13: Ultra DMA Data-In Burst Device Termination Timing. The timing parameters are specified in
Table 26: Ultra DMA Data Burst Timing Requirements and are described in Table 27: Ultra DMA Data Burst Timing
Descriptions.
The following steps shall occur in the order they are listed unless otherwise specifically allowed:
a) The device shall not pause an Ultra DMA burst until at least one data word of an Ultra
b) The device shall pause an Ultra DMA burst by not generating DSTROBE edges.
c) NOTE – The host shall not immediately assert STOP to initiate Ultra DMA burst termination when the device
stops generating STROBE edges. If the device does not negate DMARQ, in order to initiate ULTRA DMA burst
termination, the host shall negate
d) The device shall resume an Ultra DMA burst by generating a DSTROBE edge.
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Figure 13: Ultra DMA Data-In Burst Device Termination Timing
Notes: The definitions for the STOP, HDMARDY, and DSTROBE signal lines are no longer in effect after DMARQ and
DMACK are negated.
6.5.4.4.5 Host Terminating an Ultra DMA Data-In Burst
The host terminates an Ultra DMA Data-In burst by following the steps lettered below. The timing diagram is
shown in Figure 14: Ultra DMA Data-In Burst Host Termination Timing. The timing parameters are specified in
Table 26: Ultra DMA Data Burst Timing Requirements and are described in Table 27: Ultra DMA Data Burst Timing
Descriptions.
The following steps shall occur in the order they are listed unless otherwise specifically allowed:
a) The host shall not initiate Ultra DMA burst termination until at least one data word of an Ultra DMA burst
has been transferred.
b) The host shall initiate Ultra DMA burst termination by negating –HDMARDY. The host shall continue to
negate –HDMARDY until the Ultra DMA burst is terminated.
c) The device shall stop generating DSTROBE edges within tRFS of the host negating –HDMARDY
d) If the host negates –HDMARDY within tSR after the device has generated a DSTROBE edge, then the host
shall be prepared to receive zero or one additional data words. If the host negates HDMARDYgreater than
tSR after the device has generated a DSTROBE edge, then the host shall be prepared to receive zero, one or
two additional data words. The additional data words are a result of cable round trip delay and tRFS
timing for the device.
e) The host shall assert STOP no sooner than tRP after negating –HDMARDY. The host shall not negate STOP
again until after the Ultra DMA burst is terminated.
f) The device shall negate DMARQ within tLI after the host has asserted STOP. The device shall not assert
DMARQ again until after the Ultra DMA burst is terminated.
g) If DSTROBE is negated, the device shall assert DSTROBE within tLI after the host has asserted STOP. No data
shall be transferred during this assertion. The host shall ignore this transition on DSTROBE. DSTROBE shall
remain asserted until the Ultra DMA burst is terminated.
h) The device shall release D[15:0] no later than tAZ after negating DMARQ.
i) The host shall drive DD D[15:0] no sooner than tZAH after the device has negated DMARQ. For this step, the
host may first drive D[15:0] with the result of its CRC calculation (see 6.5.4.5 ).
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j) If the host has not placed the result of its CRC calculation on D[15:0] since first driving D[15:0] during (9),
the host shall place the result of its CRC calculation on D[15:0] (see 6.5.4.5 ).
k) The host shall negate –DMACK no sooner than tMLI after the device has asserted DSTROBE and negated
DMARQ and the host has asserted STOP and negated –HDMARDY, and no sooner than tDVS after the host
places the result of its CRC calculation on D[15:0].
l) The device shall latch the host’s CRC data from D[15:0] on the negating edge of –DMACK.
m) The device shall compare the CRC data received from the host with the results of its own CRC calculation. If
a miscompare error occurs during one or more Ultra DMA burst for any one command, at the end of the
command, the device shall report the first error that occurred (see 6.5.4.5 ).
n) The device shall release DSTROBE within tIORDYZ after the host negates –DMACK.
o) The host shall neither negate STOP nor assert –HDMARDY until at least tACK after the host has negated –
DMACK.
p) The host shall not assert –IORD, -CS0, -CS1, A2, A1, or A0 until at least tACK after negating DMACK.
Figure 14: Ultra DMA Data-In Burst Host Termination Timing
Notes: The definitions for the STOP, HDMARDY, and DSTROBE signal lines are no longer in effect after
DMARQ and DMACK are negated.
6.5.4.4.6 Initiating an Ultra DMA Data-Out Burst
An Ultra DMA Data-out burst is initiated by following the steps lettered below. The timing diagram
is shown in Figure 15: Ultra DMA Data-Out Burst Initiation Timing. The timing parameters are
specified in Table 26: Ultra DMA Data Burst Timing Requirements and are described in Table 27: Ultra DMA Data
Burst Timing Descriptions.
The following steps shall occur in the order they are listed unless otherwise specifically allowed:
a) The host shall keep –DMACK in the negated state before an Ultra DMA burst is initiated.
b) The device shall assert DMARQ to initiate an Ultra DMA burst.
c) Steps I, (d), and (e) may occur in any order or at the same time. The host shall assert STOP.
d) The host shall assert HSTROBE.
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e) The host shall negate –CS0, -CS1, A2, A1, and A0. The host shall keep –CS0, -CS1, A2, A1, and A0 negated
until after negating –DMACK at the end of the burst.
f) Steps I, (d), and (e) shall have occurred at least tACK before the host asserts –DMACK. The host shall keep –
DMACK asserted until the end of an Ultra DMA burst.
g) The device may negate –DDMARDY tZIORDY after the host has asserted –DMACK. Once the device has negated
–DDMARDY, the device shall not release –DDMARDY until after the host has negated DMACK at the end of
an Ultra DMA burst.
h) The host shall negate STOP within tENV after asserting –DMACK. The host shall not assert STOP until after the
first negation of HSTROBE.
i) The device shall assert –DDMARDY within tLI after the host has negated STOP. After asserting DMARQ and –
DDMARDY the device shall not negate either signal until after the first negation of HSTROBE by the host.
j) The host shall drive the first word of the data transfer onto D[15:0]. This step may occur any time during
Ultra DMA burst initiation.
k) To transfer the first word of data: the host shall negate HSTROBE no sooner than tUI after the device has
asserted –DDMARDY. The host shall negate HSTROBE no sooner than tDVS after the driving the first word of
data onto D[15:0].
Figure 15: Ultra DMA Data-Out Burst Initiation Timing
Note: The definitions for the STOP, DDMARDY, and HSTROBE signal lines are not in effect until DMARQ and DMACK
are asserted.
6.5.4.4.7 Sustaining an Ultra DMA Data-Out Burst
An Ultra DMA Data-Out burst is sustained by following the steps lettered below. The timing diagram is shown in
Figure 16: Sustained Ultra DMA Data-Out Burst Timing. The associated timing parameters are specified in Table 26:
Ultra DMA Data Burst Timing Requirements and are described in Table 27: Ultra DMA Data Burst Timing
Descriptions.
The following steps shall occur in the order they are listed unless otherwise specifically allowed:
a) The host shall drive a data word onto D[15:0].
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b) The host shall generate an HSTROBE edge to latch the new word no sooner than tDVS after changing the
state of D[15:0]. The host shall generate an HSTROBE edge no more frequently than tCYC for the selected
Ultra DMA mode. The host shall not generate two rising or falling HSTROBE edges more frequently than 2tcyc
for the selected Ultra DMA mode.
c) The host shall not change the state of D[15:0] until at least tDVH after generating an HSTROBE edge to latch
the data.
d) The host shall repeat steps (a), (b), and (c) until the data transfer is complete or an Ultra DMA burst is
paused, whichever occurs first.
Figure 16: Sustained Ultra DMA Data-Out Burst Timing
Note: Data (D15:D0) and HSTROBE signals are shown at both the device and the host to emphasize that cable
settling time as well as cable propagation delay shall not allow the data signals to be considered stable at the
device until some time after they are driven by the host.
6.5.4.4.8 Device Pausing an Ultra DMA Data-Out Burst
The device pauses an Ultra DMA Data-Out burst by following the steps lettered below. The
timing diagram is shown in Figure 17: Ultra DMA Data-Out Burst Device Pause Timing. The
timing parameters are specified in Table 26: Ultra DMA Data Burst Timing Requirements and are
described in Table 27: Ultra DMA Data Burst Timing Descriptions.
The following steps shall occur in the order they are listed unless otherwise specifically allowed:
a) The device shall not pause an Ultra DMA burst until at least one data word of an Ultra DMA burst has been
transferred.
b) The device shall pause an Ultra DMA burst by negating –DDMARDY.
c) The host shall stop generating HSTROBE edges within tRFS of the device negating –DDMARDY.
d) If the device negates –DDMARDY within tSR after the host has generated an HSTROBE edge, then the device
shall be prepared to receive zero or one additional data words. If the device negates –DDMARDY greater
than tSR after the host has generated an HSTROBE edge, then the device shall be prepared to receive zero,
one or two additional data words. The additional data words are a result of cable round trip delay and tRFS
timing for the host.
e) The device shall resume an Ultra DMA burst by asserting –DDMARDY.
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Figure 17: Ultra DMA Data-Out Burst Device Pause Timing
Notes:
1. The device may negate DMARQ to request termination of the Ultra DMA burst no sooner than tRP after
-DDMARDY is negated.
2. After negating –DDMARDY, the device may receive zero, one, two, or three more data words from the host.
6.5.4.4.9 Device Terminating an Ultra DMA Data-Out Burst
The device terminates an Ultra DMA Data-Out burst by following the steps lettered below. The timing diagram for
the operation is shown in Figure 18: Ultra DMA Data-Out Burst Device Termination Timing. The timing parameters
are specified in Table 26: Ultra DMA Data Burst Timing Requirements and are described in Table 27: Ultra DMA Data
Burst Timing Descriptions.
The following steps shall occur in the order they are listed unless otherwise specifically allowed:
a) The device shall not initiate Ultra DMA burst termination until at least one data word of an Ultra DMA
burst has been transferred.
b) The device shall initiate Ultra DMA burst termination by negating –DDMARDY.
c) The host shall stop generating an HSTROBE edges within tRFS of the device negating –DDMARDY.
d) If the device negates –DDMARDY within tSR after the host has generated an HSTROBE edge, then the device
shall be prepared to receive zero or one additional data words. If the device negates –DDMARDY greater
than tSR after the host has generated an HSTROBE edge, then the device shall be prepared to receive zero,
one or two additional data words. The additional data words are a result of cable round trip delay and
tRFS timing for the host.
e) The device shall negate DMARQ no sooner than tRP after negating –DDMARDY. The device shall not assert
DMARQ again until after the Ultra DMA burst is terminated.
f) The host shall assert STOP within tLI after the device has negated DMARQ. The host shall not negate STOP
again until after the Ultra DMA burst is terminated.
g) If HSTROBE is negated, the host shall assert HSTROBE within tLI after the device has negated DMARQ. No
data shall be transferred during this assertion. The device shall ignore this transition of HSTROBE. HSTROBE
shall remain asserted until the Ultra DMA burst is terminated.
h) The host shall place the result of its CRC calculation on D[15:0] (see 6.5.4.5 ).
i) The host shall negate –DMACK no sooner than tMLI after the host has asserted HSTROBE and STOP and the
device has negated DMARQ and –DDMARDY, and no sooner than tDVS after placing the result of its CRC
calculation on D[15:00].
j) The device shall latch the host’s CRC data from D[15:00] on the negating edge of –DMACK.
k) The device shall compare the CRC data received from the host with the results of its own CRC calculation. If
a miscompare error occurs during one or more Ultra DMA bursts for any one command.
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Figure 18: Ultra DMA Data-Out Burst Device Termination Timing
Note: The definitions for the STOP, DDMARDY, and HSTROBE signal lines are no longer in effect after
DMARQ and DMACK are negated.
6.5.4.4.10 Host Terminating an Ultra DMA Data-Out Burst
Termination of an Ultra DMA Data-Out burst by the host is shown in Figure 19: Ultra DMA Data-Out Burst Host
Termination Timing while timing parameters are specified in Table 26: Ultra DMA Data Burst Timing Requirements
and timing parameters are described in Table 27: Ultra DMA Data Burst Timing Descriptions.
The following steps shall occur in the order they are listed unless otherwise specifically allowed:
a) The host shall initiate termination of an Ultra DMA burst by not generating HSTROBE edges.
b) The host shall assert STOP no sooner than tSS after it last generated an HSTROBE edge. The host shall not
negate STOP again until after the Ultra DMA burst is terminated.
c) The device shall negate DMARQ within tLI after the host asserts STOP. The device shall not assert DMARQ
again until after the Ultra DMA burst is terminated.
d) The device shall negate –DDMARDY within tLI after the host has negated STOP. The device shall not assert –
DDMARDY again until after the Ultra DMA burst termination is complete.
e) If HSTROBE is negated, the host shall assert HSTROBE within tLI after the device has negated DMARQ. No
data shall be transferred during this assertion. The device shall ignore this transition on HSTROBE.
HSTROBE shall remain asserted until the Ultra DMA burst is terminated.
f) The host shall place the result of its CRC calculation on D[15:0] (see 6.5.4.5 ).
g) The host shall negate –DMACK no sooner than tMLI after the host has asserted HSTROBE and STOP and the
device has negated DMARQ and –DDMARDY, and no sooner than tDVS after placing the result of its CRC
calculation on D[15:0].
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h) The device shall latch the host’s CRC data from D[15:0] on the negating edge of –DMACK.
i) The device shall compare the CRC data received from the host with the results of its own CRC calculation. If
a miscompare error occurs during one or more Ultra DMA bursts for any one command, at the end of the
command, the device shall report the first error that occurred (see 6.5.4.5 ).
j) The device shall release –DDMARDY within tIORDYZ after the host has negated –DMACK.
k) The host shall neither negate STOP nor negate HSTROBE until at least tACK after negating –DMACK.
l) The host shall not assert –IOWR, -CS0, -CS1, A2, A1, or A0 until at least tACK after negating
-DMACK.
Figure 19: Ultra DMA Data-Out Burst Host Termination Timing
Notes: The definitions for the STOP, DDMARDY, and HSTROBE signal lines are no longer in effect after
DMARQ and DMACK are negated.
6.5.4.5 Ultra DMA CRC Calculation
The following is a list of rules for calculating CRC, determining if a CRC error has occurred during an Ultra DMA
burst, and reporting any error that occurs at the end of a command.
1. Both the host and the device shall have a 16-bit CRC calculation function.
2. Both the host and the device shall calculate a CRC value for each Ultra DMA burst.
3. The CRC function in the host and the device shall be initialized with a seed of 4ABAh at the beginning of
an Ultra DMA burst before any data is transferred.
4. For each STROBE transition used for data transfer, both the host and the device shall calculate a new CRC
value by applying the CRC polynomial to the current value of their individual CRC functions and the word
being transferred. CRC is not calculated for the return of STROBE to the asserted state after the Ultra DMA
burst termination request has been acknowledged.
5. At the end of any Ultra DMA burst the host shall send the results of its CRC calculation function to the
device on D[15:0] with the negation of –DMACK.
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6. The device shall then compare the CRC data from the host with the calculated value in its own CRC
calculation function. If the two values do not match, the device shall save the error and report it at the
end of the command. A subsequent Ultra DMA burst for the same command that does not have a CRC error
shall not clear an error saved from a previous Ultra DMA burst in the same command. If a miscompare
error occurs during one or more Ultra DMA bursts for any one command, at the end of the command, the
device shall report the first error that occurred.
7. For READ DMA, WRITE DMA, READ DMA QUEUED, or WRITE DMA QUEUED commands:
When a CRC error is detected, it shall be reported by setting both ICRC and ABRT (bit 7 and bit 2 in the Error
register) to one. ICRC is defined as the “Interface CRC Error” bit. The host shall respond to this error by re-
issuing the command.
8. For a REQUEST SENSE packet command (see SPC T10/955D for definition of the REQUEST SENSE command):
When a CRC error is detected during transmission of sense data the device shall complete the command
and set CHK to one. The device shall report a Sense key of 0Bh (ABORTED COMMAND). The device shall
preserve the original sense data that was being returned when the CRC error occurred. The device shall
not report any additional sense data specific to the CRC error. The host device driver may retry the REQUEST
SENSE command or may consider this an unrecoverable error and retry the command that caused the
Check Condition.
9. For any packet command except a REQUEST SENSE command: If a CRC error is detected, the device shall
complete the command with CHK set to one. The device shall report a Sense key of 04h (HARDWARE
ERROR). The sense data supplied via a subsequent REQUEST SENSE command shall report an ASC/ASCQ value
of 08h/03h (LOGICAL UNIT COMMUNICATION CRC ERROR). Host drivers should retry the command that resulted
in a HARDWARE ERROR.
NOTE – If excessive CRC errors are encountered while operating in Ultra mode 2 or 1, the host should select
a slower Ultra mode. Caution: CRC errors are detected and reported only while operating in an Ultra
mode.
10. A host may send extra data words on the last Ultra DMA burst of a data out command. If a device
determines that all data has been transferred for a command, the device shall terminate the burst. A
device may have already received more data words than were required for the command. These extra
words are used by both the host and the device to calculate the CRC, but, on an Ultra DMA data out burst,
the extra words shall be discarded by the device.
11. 11. The CRC generator polynomial is: G(X) = X16 + X12 + X5 + 1. Table 30 describes the equations for 16-bit
parallel generation of the resulting polynomial (based on a word boundary).
NOTE – Since no bit clock is available, the recommended approach for calculating CRC is to use a word
clock derived from the bus strobe. The combinational logic is then equivalent to shifting sixteen bits
serially through the generator polynomial where D0 is shifted in first and D15 is shifted in last.
Table 30: Equations for parallel generation of an Ultra DMA CRC
CRCIN0 = f16
CRCIN8 = f8 XOR f13
CRCIN1 = f15
CRCIN9 = f7 XOR f12
CRCIN2 = f14
CRCIN10 = f6 XOR f11
CRCIN3 = f13
CRCIN11 = f5 XOR f10
CRCIN4 = f12
CRCIN12 = f4 XOR f9 XOR f16
CRCIN5 = f11 XOR f16
CRCIN13 = f3 XOR f8 XOR f15
CRCIN6 = f10 XOR f15
CRCIN14 = f2 XOR f7 XOR f14
CRCIN7 = f9 XOR f14
CRCIN15 = f1 XOR f6 XOR f13
f1 = D0 XOR CRCOUT15
f9 = D8 XOR CRCOUT7 XOR f5
f2 = D1 XOR CRCOUT14
f10 = D9 XOR CRCOUT6 XOR f6
f3 = D2 XOR CRCOUT13
f11 = D10 XOR CRCOUT5 XOR f7
f4 = D3 XOR CRCOUT12
f12 = D11 XOR CRCOUT4 XOR f1 XOR f8
f5 = D4 XOR CRCOUT11 XOR f1
f13 = D12 XOR CRCOUT3 XOR f2 XOR f9
f6 = D5 XOR CRCOUT10 XOR f2
f14 = D13 XOR CRCOUT2 XOR f3 XOR f10
f7 = D6 XOR CRCOUT9 XOR f3
f15 = D14 XOR CRCOUT1 XOR f4 XOR f11
f8 = D7 XOR CRCOUT8 XOR f4
f16 = D15 XOR CRCOUT0 XOR f5 XOR f12
Notes:
1. f=feedback
2. D[15:0] = Data to or from the bus
3. CRCOUT = 16-bit edge triggered result (current CRC)
4. CRCOUT[15:0] are sent on matching order bits of D[15:0]
An example of a CRC generator implementation is provided below in Figure 20: Ultra DMA Parallel CRC Generator
Example.
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Figure 20: Ultra DMA Parallel CRC Generator Example
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7 Card Configuration
The CompactFlashTM Memory Card is identified by information in the Card Information Structure (CIS). The Card has
four configuration registers (Table 31
and Table 32).
Configuration Option Register
Pin Replacement Register
Card Configuration and Status Register
They are used to coordinate the I/O spaces and the Interrupt level of cards that are located in the system. In
addition, in I/O Card mode these registers provide a method for accessing status information that would normally
appear on dedicated pins in Memory Card mode.
The base address of the card configuration registers is 200h in the Attribute Memory space.
No write operation should be performed to the attribute memory area except for the configuration register
addresses. All other attribute memory locations are reserved. See 7.4
Attribute Memory Function.
Table 31: CompactFlashTM Memory Card Registers and Memory Space Decoding
-CE2
-CE1
-REG
-OE
-WE
A10
A9
A8-A4
A3
A2
A1
A0
Selected Space
1
1
X
X
X
X
X
XX
X
X
X
X
Standby
X
0
0
0
1
X
1
XX
X
X
X
0
Configuration Register Read
1
0
1
0
1
X
X
XX
X
X
X
X
Common Memory Read (8 bit – D7 to D0)
0
1
1
0
1
X
X
XX
X
X
X
X
Common Memory Read (8 bit – D15 to D8)
0
0
1
0
1
X
X
XX
X
X
X
0
Common Memory Read (16 bit – D15 to D0)
X
0
0
1
0
X
1
XX
X
X
X
0
Configuration Register Write
1
0
1
1
0
X
X
XX
X
X
X
X
Common Memory Write (8 bit – D7 to D0)
0
1
1
1
0
X
X
XX
X
X
X
X
Common Memory Write (8 bit – D15 to D8)
0
0
1
1
0
X
X
XX
X
X
X
0
Common Memory Write (16 bit – D15 to D0)
X
0
0
0
1
0
0
XX
X
X
X
0
Card Information Structure Read
1
0
0
1
0
0
0
XX
X
X
X
0
Invalid Access (CIS Write)
1
0
0
0
1
X
X
XX
X
X
X
1
Invalid Access (CIS Odd Byte Read)
1
0
0
1
0
X
X
XX
X
X
X
1
Invalid Access (CIS Odd Byte Write)
0
1
0
0
1
X
X
XX
X
X
X
X
Invalid Access (CIS Odd Byte Read)
0
1
0
1
0
X
X
XX
X
X
X
X
Invalid Access (CIS Odd Byte Write)
Table 32: CompactFlashTM Memory Card Configuration Registers Decoding
-CE2
-CE1
-REG
-OE
-WE
A10
A9
A8~A4
A3
A2
A1
A0
Selected Space
X
0
0
0
1
0
1
00
0
0
0
0
Configuration Option Register Read(200h)
X
0
0
1
0
0
1
00
0
0
0
0
Configuration Option Register Write(200h)
X
0
0
0
1
0
1
00
0
0
1
0
Card Status Register Read (202h)
X
0
0
1
0
0
1
00
0
0
1
0
Card Status Register Write (202h)
X
0
0
0
1
0
1
00
0
1
0
0
Pin Replacement Register Read (204h)
X
0
0
1
0
0
1
00
0
1
0
0
Pin Replacement Register Write (204h)
Note: The location of the Card Configuration Registers should always be read from the CIS since these locations
may vary in future products. No Writes should be performed to the Card Attribute Memory except to the Card
Configuration Register Addresses. All other attribute memory locations are reserved.
7.1 Configuration Option Register (200h in Attribute Memory)
The Configuration Option Register is used to configure the Card’s interface, address decoding and interrupt to the
Card (see Table 33).
7.1.1 SRESET
Setting the SRESET bit to ‘1’ and returning the bit ‘0’ places the CompactFlashTM Storage Card in the Reset state.
Setting this bit to ‘1’ is equivalent to asserting the RESET signal except that the SRESET bit is not cleared. Returning
the SRESET bit to ‘0’ leaves the CompactFlashTM Storage Card in the same un-configured Reset state as after a
power-up and hardware reset.
This bit is set to ‘0’ at power-up and taking the Card through a hardware reset.
7.1.2 LevlREQ
This bit is set to one (1) when Level Mode Interrupt is selected, and zero (0) when Pulse Mode is selected. Set to
zero (0) after Power Up.
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7.1.3 Conf5 – Conf0 (Configuration Index)
These bits are used to select the operation mode of the Card as shown in Table 34
.
This bit is set to ‘0’ after Power
Up.
Table 33: Configuration Option Register (default value: 00h)
Operation
D7
D6
D5
D4
D3
D2
D1
D0
R/W
SRESET
LevlREQ
Conf5
Conf4
Conf3
Conf2
Conf1
Conf0
Table 34: CompactFlashTM Memory Card Configurations
Conf5
Conf4
Conf3
Conf2
Conf1
Conf0
Mapping Mode
Card
Mode
Task File Register Address
0
0
0
0
0
0
Memory
Memory
0h – Fh, 400h – 7FFh
0
0
0
0
0
1
Contiguous I/O
I/O
xx0h – xxFh
0
0
0
0
1
0
Primary I/O
I/O
1F0h – 1F7h, 3F6h – 3F7h
0
0
0
0
1
1
Secondary I/O
I/O
170h – 177h, 376h – 377h
7.2 CompactFlashTM Memory Card Configurations
The Card Configuration and Status Register contains information about the Card’s status (see Table 35).
7.2.1 Changed
Indicates that one or both of the Pin Replacement register (CRDY, or CWProt) bits are set to ‘1’. When the Changed
bit is set, -STSCHG (Pin 46) is held Low and if the SigChg bit is ‘1’ the Card is configured for the I/O interface.
7.2.2 SigChg
This bit is set and reset by the host to enable and disable a state-change signal from the Status Register (issued
on Status Changed pin 46). If no state change signal is desired, this bit should be set ‘0’ and pin 46 (-STSCHG) will
be held High while the Card is configured for I/O.
7.2.3 Iois8
The host sets this bit to ‘1’ if the Card is to be configured in 8 bit I/O Mode. The Card is always configured for both
8 and 16 bit I/O, so this bit is ignored.
7.2.4 PwrDwn
This bit indicates whether the Card is in the power saving mode or active mode. When the PwrDwn bit is set to ‘1’,
the Card enters power down mode. When set to ‘0’, the Card enters active mode. The READY value on Pin
Replacement Register becomes BUSY when this bit is changed. READY will not become Ready until the power state
requested has been entered. The Card automatically powers down when it is idle and powers back up when it
receives a command.
7.2.5 Int
This bit represents the internal state of the interrupt request. It is available whether or not the I/O interface has
been configured. It remains valid until the condition which caused the interrupt request has been serviced. If
interrupts are disabled by the –IEN bit in the Device Control Register, this bit is ‘0’.
Table 35: Card Configuration and Status Register (default value: 00h)
Operation
D7
D6
D5
D4
D3
D2
D1
D0
Read
Changed
SigChg
IOIS8
0
0
PwrDwn
Int
0
Write
0
SigChg
IOIS8
0
0
PwrDwn
0
0
7.3 Pin Replacement Register (204h in Attribute Memory)
This register contains information on the state of the READY signal when configured in memory mode and the
IREQ signal in I/O mode. See Table 36
and Table 37.
7.3.1 Cready
This bit is set to ‘1’ when the bit Rready changes state. This bit can also be written by the host.
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7.3.2 CWProt
This bit is set to ‘1’ when the bit RWProt changes state. This bit can also be written by the host.
7.3.3 Rready
This bit is used to determine the internal state of the Ready signal. In I/O mode it is used as an interrupt request.
When written, this bit acts as a mask (Mready) for writing the corresponding bit Cready.
7.3.4 Wprot
This bit is always ‘0’ since the CompactFlashTM Memory Card does not have a Write Protect switch. When written,
this bit acts as a mask for writing the corresponding CWProt bit.
7.3.5 Mready
This bit acts as a mask for writing the corresponding Cready bit.
7.3.6 MWProt
This bit when written acts as a mask for writing the corresponding CWProt bit.
Table 36: Pin Replacement Register (default value: 0Ch)
Operation
D7
D6
D5
D4
D3
D2
D1
D0
Read
0
0
Cready
CWProt
1
1
Rready
Wprot
Write
0
0
Cready
CWProt
0
0
Rready
MWProt
Table 37: Pin Replacement Changed Bit/Mask Bit Values
Initial Value of ‘C’ Status
Written by Host
Final ‘C’ Bit
Comments
‘C’ Bit
‘M’ Bit
0
X
0
0
Unchanged
1
X
0
1
Unchanged
X
0
1
0
Cleared by Host
X
1
1
1
Set by Host
7.4 Attribute Memory Function
Attribute memory is a space where identification and configuration information are stored. Only 8 bit wide
accesses at even addresses can be performed in this area. The Card configuration registers are also located in the
Attribute Memory area, at base address 200h. Attribute memory is not accessible in True IDE mode of operation.
For the Attribute Memory Read function, signals –REG and –OE must be active and –WE inactive during the cycle.
As in the Main Memory Read functions, the signals –CE1 and –CE2 control the even and odd Byte address, but only
the even Byte data is valid during the Attribute Memory access. Refer to Table 38
for signal states and bus validity.
Table 38: Attribute Memory Function
Function Mode
-REG
-CE2(1)
-CE1(1)
A10
A9
A0
-OE(1)
-WE(1)
D15 to D8
D7 to D0
Standby
X
H
H
X
X
X
X
X
High-Z
High-Z
Read Byte Access CIS (8 bits)
L
H
L
L
L
L
L
H
High-Z
Even Byte
Write Byte Access CIS (8 bits)
Invalid
L
H
L
L
L
L
H
L
Don’t Care
Even Byte
Read Byte Access
Configuration (8 bits)
L
H
L
L
H
L
L
H
High-Z
Even Byte
Write Byte Access
Configuration (8 bits)
L
H
L
L
H
L
H
L
Don’t Care
Even Byte
Read Byte Access
Configuration CF+ (8 bits)
L
H
L
X
X
L
L
H
High-Z
Even Byte
Read Word Access CIS (16
bits)
L
L
L
L
L
L*
L
H
Not Valid
Even Byte
Write Word Access CIS (16
bits) Invalid
L
L
L
L
L
L*
H
L
Don’t Care
Even Byte
Read Word Access
Configuration (16 bits)
L
L
L
L
H
L*
L
H
Not Valid
Even Byte
Write Word Access
Configuration (16 bits)
L
L
L
L
H
L*
H
L
Don’t Care
Even Byte
1 The –CE signal or both the –OE signal and the –WE signal must be de-asserted between consecutive cycle operations.
* Address A0 must be low for all word accesses.
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7.5 I/O Transfer Function
The I/O transfer to or from the Card can be either 8 or 16 bits. When a 16 bit accessible port is addressed, the –
IOIS16 signal is asserted by the Card, otherwise it is de-asserted. When a 16 bit transfer is attempted, and the –
IOIS16 signal is not asserted, the system must generate a pair of 8 bit references to access the Word’s even and
odd Bytes. The Card permits both 8 and 16 bit accesses to all of its I/O addresses, so –IOIS16 is asserted for all
addresses (see Table 39).
Table 39: I/O Function
Function Code
-REG
-CE2
-CE1
A0
-IORD
-IOWR
D15 to D8
D7 to D0
Standby Mode
X
H
H
X
X
X
High Z
High Z
Byte Input Access
L
H
L
L
L
H
High Z
Even Byte
(8 bits)
L
H
L
H
L
H
High Z
Odd Byte
Byte Output Access
L
H
L
L
H
L
Don’t Care
Even Byte
(8 bits)
L
H
L
H
H
L
Don’t Care
Odd Byte
Word Input Access (16 bits)
L
L
L
L*
L
H
Odd Byte
Even Byte
Word Output Access (16 bits)
L
L
L
L*
H
L
Odd Byte
Even Byte
I/O Read Inhibit
H
X
X
X
L
H
Don’t Care
Don’t Care
I/O Write Inhibit
H
X
X
X
H
L
High Z
High Z
High Byte Input Only (8 bits)
L
L
H
X
L
H
Odd Byte
High Z
High Byte Output Only (8 bits)
L
L
H
X
H
L
Odd Byte
Don’t Care
* Address A0 must be low for all word accesses.
7.6 Common Memory Transfer Function
The Common Memory transfer to or from the Card permits both 8 or 16 bit access to all of the Common Memory
addresses (see Table 40).
Table 40: Common Memory Function
Function Code
-REG
-CE2
-CE1
A0
-OE
-WE
D15 to D8
D7 to D0
Standby Mode
X
H
H
X
X
X
High Z
High Z
Byte Read Access
H
H
L
L
L
H
High Z
Even Byte
(8 bits)
H
H
L
H
L
H
High Z
Odd Byte
Byte Write Access
H
H
L
L
H
L
Don’t Care
Even Byte
(8 bits)
H
H
L
H
H
L
Don’t Care
Odd Byte
Word Read Access (16 bits)
H
L
L
L*
L
H
Odd Byte
Even Byte
Word Write Access (16 bits)
H
L
L
L*
H
L
Odd Byte
Even Byte
Odd Byte Read Only (8 bits)
H
L
H
X
L
H
Odd Byte
High Z
Odd Byte Write Only (8 bits)
H
L
H
X
H
L
Odd Byte
Don’t Care
* Address A0 must be low for all word accesses.
7.7 True IDE Mode I/O Function
The Card can be configured in a True IDE Mode of operation. It is configured in this mode only when the –OE
signal is grounded by the host during the power off to power on cycle. In this True IDE Mode the PC card protocol
and configuration are disabled and only I/O operations to the Task File and Data Register are allowed. No Memory
or Attribute Registers are accessible to the host. The Set Feature Command can be used to put the device in 8 bit
Mode (see Table 41).
Removing and reinserting the Card while the host computer’s power is on will reconfigure the Card to PC Card ATA
mode.
Table 41: True IDE Mode I/O Function
Function Code
-CS1
-CS0
A2 to A0
-DMACK
-IORD
-IOWR
D15 to D8
D7 to D0
Invalid Mode
L
L
X
X
X
X
Undefined
In/Out
Undefined In/Out
L
X
X
L
L
X
Undefined Out
Undefined Out
L
X
X
L
X
L
Undefined In
Undefined In
X
L
X
L
L
X
Undefined Out
Undefined Out
X
L
X
L
X
L
Undefined In
Undefined In
Standby Mode
H
H
X
H
X
X
High Z
High Z
Task File Write
H
L
1h-7h
H
H
L
Don’t Care
Data In
Task File Read
H
L
1h-7h
H
L
H
High Z
Data Out
PIO Data Register Write
H
L
0
H
H
L
Odd-Byte In
Even-Byte In
DMA Data Register Write
H
L
X
L
H
L
Odd-Byte In
Even-Byte In
PIO Data Register Read
H
L
0
H
L
H
Odd-Byte Out
Even-Byte Out
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DMA Data Register Read
H
H
X
L
L
H
Odd-Byte Out
Even-Byte Out
Control Register Write
L
H
6h
H
H
L
Don’t Care
Control In
Alternate Status Read
L
H
6h
H
L
H
High Z
Status Out
Drive Address
L
H
7h
H
L
H
High Z
Data Out
7.8 Host Configuration Requirements for Master/Slave or New Timing Modes
The CF Advanced Timing modes include PCMCIA PC Card style I/O modes that are faster than the original 250 ns
cycle time. These modes are not supported by the PCMCIA PC Card specification nor CF by cards based on revisions
of the CF specification before Revision 3.0. Hosts shall ensure that all cards accessed through a common electrical
interface are capable of operation at the desired, faster than 250 ns, I/O mode before configuring the interface for
that I/O mode.
Advanced Timing modes are PCMCIA PC Card style I/O modes that are 100 ns or faster, PC Card Memory modes that
are 100ns or faster, True IDE PIO Modes 5, 6 and Multiword DMA Modes 3, 4. These modes are permitted to be used
only when a single card is present and the host and card are connected directly, without a cable exceeding 0.15m
in length. Consequently, the host shall not configure a card into an Advanced Timing Mode if two cards are
sharing I/O lines, as in Master/Slave operation, nor if it is constructed such that a cable exceeding 0.15 meters is
required to connect the host to the card.
The load presented to the Host by cards supporting Ultra DMA is more controlled than that presented by other
CompactFlashTM cards. Therefore, the use of a card that does not support Ultra DMA in a Master/Slave arrangement
with an Ultra DMA card can affect the critical timing of the Ultra DMA transfers. The host shall not configure a card
into Ultra DMA mode when a card not supporting Ultra DMA is also present on the same interface
When the use of two cards on an interface is otherwise permitted, the host may use any mode that is supported
by both cards, but to achieve maximum performance it should use its highest performance mode that is also
supported by both cards.
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8 Software interface
8.1 CF-ATA Drive Register Set Definition and Protocol
The CompactFlashTM Memory Card can be configured as a high performance I/O device through:
Standard PC-AT disk I/O address spaces
o 1F0h-1F7h, 3F6h-3F7h (primary);
o 170h-177h, 376h-377h (secondary) with IRQ 14 (or other available IRQ).
Any system decoded 16 Byte I/O block using any available IRQ.
Memory space.
Communication to or from the Card is done using the Task File registers which provide all the necessary registers
for control and status information. The PCMCIA interface connects peripherals to the host using four-register
mapping methods. Table 42: I/O Configurations
is a detailed description of these methods:
Table 42: I/O Configurations
Standards Configurations
Config Index
I/O or Memory
Address
Description
0
Memory
0h-Fh, 400h-7FFh
Memory Mapped
1
I/O
xx0h-xxFh
I/O Mapped 16 Continuous Registers
2
I/O
1F0-1F7h, 3F6h-3F7h
Primary I/O Mapped
3
I/O
170-177h, 376h-377h
Secondary I/O Mapped
8.2 Memory Mapped Addressing
When the Card registers are accessed via memory references, the registers appear in the common memory space
window: 0-2Kbytes as shown in Table 43: Memory Mapped Decoding
.
This window accesses the Data Register FIFO.
It does not allow random access to the data buffer within the Card.
Register 0 is accessed with –CE1 and –CE2 Low, as a Word register on the combined Odd and Even Data Bus (D15 to
D0). Address A0 must be low for all word accesses. It can also be accessed with –CE1 Low and –CE2 High, by a pair
of Byte accesses to offset 0. The address space of this Word register overlaps the address space of the Error and
Feature Byte-wide registers at offset 1. When accessed twice as Byte register with –CE1 Low, the first Byte is the
even Byte of the Word and the second is the odd Byte. A Byte access to address 0 with –CE1 High and –CE2 Low
accesses the Error (read) or Feature (write) register.
Registers at offset 8, 9 and D are non-overlapping duplicates of the registers at offset 0 and 1. Register 8 is
equivalent to register 0, while register 9 accesses the odd Byte. Therefore, if the registers are Byte accessed in the
order 9 then 8 the data will be transferred odd Byte then even Byte. Repeated Byte accesses to register 8 or 0 will
access consecutive (even then odd) Bytes from the data buffer. Repeated Word accesses to register 8, 9 or 0 will
access consecutive Words from the data buffer, however repeated Byte accesses to register 9 are not supported.
Repeated alternating Byte accesses to registers 8 then 9 will access consecutive (even then odd) Bytes from the
data buffer.
Accesses to even addresses between 400h and 7FFh access register 8. Accesses to odd addresses between 400h
and 7FFh access register 9. This 1 kByte memory window to the data register is provided so that hosts can perform
memory-to-memory block moves to the data register when the register lies in memory space. Some hosts, such
as the X86 processors, must increment both the source and destination addresses when executing the memory-
to-memory block move instruction. Some PCMCIA socket adapters also have embedded auto incrementing address
logic.
A Word access to address at offset 8 will provide even data on the least significant Byte of the data bus, along
with odd data at offset 9 on the most significant Byte of the data bus.
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Table 43: Memory Mapped Decoding
-REG
A10
A9 to A4
A3
A2
A1
A0
Offset
-OE=0
-WE=0
1
0
X
0
0
0
0
0h
Even Data Register
Even Data Register
1
0
X
0
0
0
1
1h
Error Register
Feature Register
1
0
X
0
0
1
0
2h
Sector Count Register
Sector Count Register
1
0
X
0
0
1
1
3h
Sector Number Register
Sector Number Register
1
0
X
0
1
0
0
4h
Cylinder Low Register
Cylinder Low Register
1
0
X
0
1
0
1
5h
Cylinder High Register
Cylinder High Register
1
0
X
0
1
1
0
6h
Select Card/Head Register
Select Card/Head Register
1
0
X
0
1
1
1
7h
Status Register
Command Register
1
0
X
1
0
0
0
8h
Dup. Even Data Register
Dup. Even Data Register
1
0
X
1
0
0
1
9h
Dup. Odd Data Register
Dup. Odd Data Register
1
0
X
1
1
0
1
Dh
Dup. Error Register
Dup. Feature Register
1
0
X
1
1
1
0
Eh
Alternate Status Register
Device Control Register
1
0
X
1
1
1
1
Fh
Drive Address Register
Reserved
1
1
X
X
X
X
0
8h
Even Data Register
Even Data Register
1
1
X
X
X
X
1
9h
Odd Data Register
Odd Data Register
8.3 Contiguous I/O Mapped Addressing
When the system decodes a contiguous block of I/O registers to select the Card, the registers are accessed in the
block of I/O space decoded by the system as shown in Table 44
.
Address A0 must be low for all word accesses. As for the Memory Mapped Addressing, register 0 is accessed with –
CE1 Low and –CE2 Low (A0 must be 0) as a Word register on the combined Odd and Even Data Bus (D15 to D0). This
register may also be accessed with –CE1 Low and –CE2 High, by a pair of Byte accesses to offset 0. The address
space of this Word register overlaps the address space of the Error and Feature Byte-wide registers at offset 1.
When accessed twice as Byte register with –CE1 Low, the first Byte is the even Byte of the Word and the second is
the odd Byte. A Byte access to register 0 with –CE1 High and –CE2 Low accesses the error (read) or feature (write)
register.
Registers at offset 8, 9 and D are non-overlapping duplicates of the registers at offset 0 and 1. Register 8 is
equivalent to register 0, while register 9 accesses the odd Byte. Therefore, if the registers are Byte accessed in the
order 9 then 8 the data will be transferred odd Byte then even Byte. Repeated Byte accesses to register 8 or 0 will
access consecutive (even than odd) Bytes from the data buffer. Repeated Word accesses to register 8, 9 or 0 will
access consecutive Words from the data buffer, however repeated Byte accesses to register 9 are not supported.
Repeated alternating Byte accesses to registers 8 then 9 will access consecutive (even then odd) Bytes from the
data buffer.
Table 44: Contiguous I/O Decoding
-REG
A10 to A4
A3
A2
A1
A0
Offset
-IORD=0
-IOWR=0
0
X
0
0
0
0
0h
Even Data Register
Even Data Register
0
X
0
0
0
1
1h
Error Register
Feature Register
0
X
0
0
1
0
2h
Sector Count Register
Sector Count Register
0
X
0
0
1
1
3h
Sector Number Register
Sector Number Register
0
X
0
1
0
0
4h
Cylinder Low Register
Cylinder Low Register
0
X
0
1
0
1
5h
Cylinder High Register
Cylinder High Register
0
X
0
1
1
0
6h
Select Card/Head Register
Select Card/Head Register
0
X
0
1
1
1
7h
Status Register
Command Register
0
X
1
0
0
0
8h
Dup. Even Data Register
Dup. Even Data Register
0
X
1
0
0
1
9h
Dup. Odd Data Register
Dup. Odd Data Register
0
X
1
1
0
1
Dh
Dup. Error Register
Dup. Feature Register
0
X
1
1
1
0
Eh
Alternate Status Register
Device Control Register
0
X
1
1
1
1
Fh
Drive Address Register
Reserved
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8.4 I/O Primary and Secondary Address Configurations
When the system decodes the Primary and Secondary Address Configurations, the registers are accessed in the
block of I/O space as shown in Table 45
.
Address A0 must be low for all word accesses. As for the Memory Mapped Addressing, register 0 is accessed with –
CE1 Low and –CE2 Low (A0 must be 0) as a Word register on the combined Odd and Even Data Bus (D15 to D0). This
register may also be accessed with –CE1 Low and –CE2 High, by a pair of Byte accesses to offset 0. The address
space of this Word register overlaps the address space of the Error and Feature Byte-wide registers at offset 1.
When accessed twice as Byte register with –CE1 Low, the first Byte is the even Byte of the Word and the second is
the odd Byte. A Byte access to register 0 with –CE1 High and –CE2 Low accesses the error (read) or feature (write)
register.
Table 45: Primary and Secondary I/O Decoding
-REG
A9 to A4
A3
A2
A1
A0
-IORD=0
-IOWR=0
0
1F(17)h
0
0
0
0
Even Data Register
Even Data Register
0
1F(17)h
0
0
0
1
Error Register
Feature Register
0
1F(17)h
0
0
1
0
Sector Count Register
Sector Count Register
0
1F(17)h
0
0
1
1
Sector Number Register
Sector Number Register
0
1F(17)h
0
1
0
0
Cylinder Low Register
Cylinder Low Register
0
1F(17)h
0
1
0
1
Cylinder High Register
Cylinder High Register
0
1F(17)h
0
1
1
0
Select Card/Head Register
Select Card/Head Register
0
1F(17)h
0
1
1
1
Status Register
Command Register
0
3F(37)h
0
1
1
0
Alternate Status Register
Device Control Register
0
3F(37)h
0
1
1
1
Drive Address Register
Reserved
8.5 True IDE Mode Addressing
When the Card is configured in the True IDE Mode, the I/O decoding is as shown in Table 46
.
Table 46: True IDE Mode I/O Decoding
-CS1
-CS0
A2
A1
A0
-DMACK
-IORD=0
-IOWR=0
1
0
0
0
0
1
PIO RD Data
PIO WR Data
1
1
X
X
X
0
DMA RD Data
DMA WR Data
1
0
0
0
1
1
Error Register
Features
1
0
0
1
0
1
Sector Count
Sector Count
1
0
0
1
1
1
Sector No.
Sector No.
1
0
1
0
0
1
Cylinder Low
Cylinder Low
1
0
1
0
1
1
Cylinder High
Cylinder High
1
0
1
1
0
1
Select Card/Head
Select Card/Head
1
0
1
1
1
1
Status
Command
0
1
1
1
0
1
Alt Status
Control Register
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9 CF-ATA Registers
The following section describes the hardware registers used by the host software to issue commands to the Card.
These registers are collectively referred to as the ‘task file’.
In accordance with the PCMCIA specification, each register that is located at an odd offset address can be accessed
in the PC Card Memory or PC Card I/O modes. The register can be addressed in two ways:
Using the normal register address.
Using the corresponding even address (normal address -1) when –CE1 is High and –CE2 Low, unless –IOIS16
is High (not asserted by the card) and an I/O cycle is in progress. Register data are input or output on data
bus lines D15-D8.
In True IDE mode, the size of the transfer is based solely on the register being addressed. All registers are 8-bit
only except for the Data Register, which is normally 16 bits. However, they can be configured to be accessed in 8-
bit mode for non-DMA operations, by using a Set Features command (see
Section 10.25
).
There are situations possible where the C-440 CompactFlash Card is not compatible to certain PC-Card (PCMCIA) host systems.
PC-Card mode, 16 bit ATA register file accesses (i.e. both -CE1 and -CE2 low) aren’t working if A0 is high (odd addresses). The
IOIS16 signal might also not work correctly. If a host uses this signal, this may result in 16 bit accesses being changed to two 8
bit accesses. Depending on the address, this may fail.
A simple test will show the C-400 compatibility to a certain host. If the C-400 cards can be recognized (Identify Device and
MBR data is read out successfully), then this PC card issue will likely not affect the operation in this host. Host systems with
IDE/ATA interface are not affected by the issue, described above.
9.1 Data Register
The Data register is located at address 1F0h [170h], offset 0h, 8h, and 9h.
The Data Register is a 16 bit register used to transfer data blocks between the Card data buffer and the Host. This
register overlaps the Error Register. Table 47
and Table 48
describe the combinations of Data register access and
explain the overlapped Data and Error/Feature Registers. Because of the overlapped registers, access to the 1F1h,
171h or offset 1 are not defined for Word (-CE2 and –CE1 set to ‘0’) operations, and are treated as accesses to the
Word Data Register. The duplicated registers at offsets 8, 9 and Dh have no restrictions on the operations that can
be performed.
Table 47: Data Register Access (Memory and I/O mode)
Data Register
-CE2
-CE1
A0
-REG(1)
Offset
Data Bus
Word Data Register
0
0
0(2)
-
0h, 8h, 9h
D15 to D0
Even Data Register
1
0
0
-
0h, 8h
D7 to D0
Odd Data Register
1
0
1
-
9h
D7 to D0
Odd Data Register
0
1
X
-
8h, 9h
D15 to D8
Error/Feature Register
1
0
1
-
1h, Dh
D7 to D0
Error/Feature Register
0
1
X
-
1h
D15 to D8
Error/Feature Register
0
0
0(2)
-
Dh
D15 to D8
1 –REG signal is mode dependent. It must be Low when the Card operates in I/O Mode and High when it operates in
Memory Mode.
2 In current C-400 cards A0 must be 0 for all word accesses (if –CE2 and –CE1 are 0).
Table 48: Data Register Access (True IDE mode)
Data Register
-CS1
-CS0
A0
-DMACK
Offset
Data Bus
PIO Word Data Register
1
0
0
1
0h
D15 to D0
DMA Word Data Register
1
1
X
0
X
D15 to D0
PIO Byte Data Register (Selected Using Set
Features Command)
1
0
0
1
0h
D7 to D0
9.2 Error Register
The Error register is a read-only register, located at address 1F1h [171h], offset 1h, 0Dh.
This read only register contains additional information about the source of an error when an error is indicated in
bit 0 of the Status register. The bits are defined in Table 49
This register is accessed on data bits D15 to D8 during
a write operation to offset 0 with –CE2 Low and –CE1 High.
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9.2.1 Bit 7 (BBK)
This bit is set when a Bad Block is detected.
9.2.2 Bit 6 (UNC)
This bit is set when an Uncorrectable Error is encountered.
9.2.3 Bit 5
This bit is ‘0’.
9.2.4 Bit 4 (IDNF)
This bit is set if the requested sector ID is in error or cannot be found.
9.2.5 Bit 3
This bit is ‘0’.
9.2.6 Bit 2 (Abort)
This bit is set if the command has been aborted because of a Card status condition (Not Ready, Write Fault, etc.)
or when an invalid command has been issued.
9.2.7 Bit 1
This bit is ‘0’.
9.2.8 Bit 0 (AMNF)
This bit is set when there is a general error.
Table 49: Error Register
D7
D6
D5
D4
D3
D2
D1
D0
BBK
UNC
0
IDNF
0
ABRT
0
AMNF
9.3 Feature Register
The Feature register is a write-only register, located at address 1F1h [171h], offset 1h, Dh.
This write-only register provides information on features that the host can utilize. It is accessed on data bits D15
to D8 during a write operation to Offset 0 with –CE2 Low and –CE1 High.
9.4 Sector Count Register
The Sector Count register is located at address 1F2h [172h], offset 2h.
This register contains the number of sectors of data to be transferred on a read or write operation between the
host and Card. If the value in this register is zero, a count of 256 sectors is specified. If the command was
successful, this register is zero at completion. If not successfully completed, the register contains the number of
sectors that need to be transferred in order to complete the request. The default value is 01h.
9.5 Sector Number (LBA 7:0) Register
The Sector Number register is located at address 1F3h [173h], offset 3h.
This register contains the starting sector number or bits 7 to 0 of the Logical Block Address (LBA), for any data
access for the subsequent sector transfer command.
9.6 Cylinder Low (LBA 15:8) Register
The Cylinder Low register is located at address 1F4h [174h], offset 4h.
This register contains the least significant 8 bits of the starting cylinder address or bits 15 to 8 of the Logical Block
Address.
9.7 Cylinder High (LBA 23:16) Register
The Cylinder High register is located at address 1F5h [175h], offset 5h.
This register contains the most significant bits of the starting cylinder address or bits 23 to 16 of the Logical Block
Address.
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9.8 Drive/Head (LBA 27:24) Register
The Driver/Head register is located at address 1F6h [176h], offset 6h.
The Drive/Head register is used to select the drive and head. It is also used to select LBA addressing instead of
cylinder/head/sector addressing. The bits are defined in Table 50
.
9.8.1 Bit 7
This bit is set to ‘1’.
9.8.2 Bit 6 (LBA)
LBA is a flag to select either Cylinder/Head/Sector (CHS) or Logical Block Address Mode (LBA). When LBA is set to ‘0’,
Cylinder/Head/Sector mode is selected. When LBA is set to’1’, Logical Block Address is selected. In Logical Block
Mode, the Logical Block Address is interpreted as follows:
LBA7-LBA0: Sector Number Register D7 to D0
LBA15-LBA8: Cylinder Low Register D7 to D0
LBA23-LBA16: Cylinder High Register D7 to D0
LBA27-LBA24: Drive/Head Register bits HS3 to HS0
9.8.3 Bit 5
This bit is set to ‘1’.
9.8.4 Bit 4 (DRV)
DRV is the drive number. When DRV is ‘0’, drive/card 0 is selected (Master). When DRV is ‘1’, drive/card 1 is selected
(Slave).
9.8.5 Bit 3 (HS3)
When operating in the Cylinder, Head, Sector mode, this is bit 3 of the head number. It is bit 27 in the Logical
Block Address mode.
9.8.6 Bit 2 (HS2)
When operating in the Cylinder, Head, Sector mode, this is bit 2 of the head number. It is bit 26 in the Logical
Block Address mode.
9.8.7 Bit 1 (HS1)
When operating in the Cylinder, Head, Sector mode, this is bit 1 of the head number. It is Bit 25 in the Logical
Block Address mode.
9.8.8 Bit 0 (HS0)
When operating in the Cylinder, Head, Sector mode, this is bit 0 of the head number. It is Bit 24 in the Logical
Block Address mode.
Table 50: Drive/Head Register
D7
D6
D5
D4
D3
D2
D1
D0
1
LBA
1
DRV
HS3
HS2
HS1
HS0
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9.9 Status & Alternate Status Registers
The Status & Alternate Status registers are located at addresses 1F7h [177h] and 3F6h [376h], respectively. Offsets
are 7h and Eh.
These registers return the Card status when read by the host.
Reading the Status Register clears a pending interrupt. Reading the Auxiliary Status Register does not clear a
pending interrupt.
The Status Register should be accessed in Byte mode; in Word mode it is recommended that Alternate Status
Register is used. The status bits are described as follows
9.9.1 Bit 7 (BUSY)
The busy bit is set when only the Card can access the command register and buffer, The host is denied access. No
other bits in this register are valid when this bit is set to ‘1’.
9.9.2 Bit 6 (RDY)
This bit indicates whether the device is capable of performing CompactFlashTM Memory Card operations. This bit is
cleared at power up and remains cleared until the Card is ready to accept a command.
9.9.3 Bit 5 (DWF)
When set this bit indicates a Write Fault has occurred.
9.9.4 Bit 4 (DSC)
This bit is set when the Card is ready.
9.9.5 Bit 3 (DRQ)
The Data Request is set when the Card requires information be transferred either to or from the host through the
Data register. The bit is cleared by the next command.
9.9.6 Bit 2 (CORR)
This bit is set when a Correctable data error has been encountered and the data has been corrected. This
condition does not terminate a multi-sector read operation.
9.9.7 Bit 1 (IDX)
This bit is always set to ‘0’.
9.9.8 Bit 0 (ERR)
This bit is set when the previous command has ended in some type of error. The bits in the Error register contain
additional information describing the error. In case of read or write access commands that end with an error, the
address of the first sector with an error is in the command block registers. This bit is cleared by the next
command.
Table 51: Status & Alternate Status Register
D7
D6
D5
D4
D3
D2
D1
D0
BUSY
RDY
DWF
DSC
DRQ
CORR
0
ERR
9.10 Device Control Register
The Device Control register is located at address 3F6h [376h], offset Eh.
This Write-only register is used to control the CompactFlashTM Memory Card interrupt request and to issue an ATA
soft reset to the Card. This register can be written even if the device is BUSY. The bits are defined as follows:
9.10.1 Bit 7 to 3
Don’t care. The host should reset this bit to ‘0’.
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9.10.2 Bit 2 (SW Rst)
This bit is set to 1 in order to force the CompactFlashTM Storage Card to perform an AT Disk controller Soft Reset
operation. This clears Status Register and writes Diagnostic Code in Error register after a Write or Read Sector error.
The Card remains in Reset until this bit is reset to ‘0.’
9.10.3 Bit 1 (-Ien)
When the Interrupt Enable bit is set to ‘0’, -IREQ interrupts are enabled. When the bit is set to ‘1’, interrupts from
the Card are disabled. This bit also controls the Int bit in the Card Configuration and Status Register. It is set to ‘0’
at Power On.
9.10.4 Bit 0
This bit is set to ‘0’.
Table 52: Device Control Register
D7
D6
D5
D4
D3
D2
D1
D0
X(0)
X(0)
X(0)
X(0)
X(0)
SW Rst
-Ien
0
9.11 Card (Drive) Address Register
The Card (Drive) Address register is located at address 3F7h [377h], offset Fh.
This read-only register is provided for compatibility with the AT disk drive interface and can be used for
confirming the drive status. It is recommended that this register is not mapped into the host’s I/O space because
of potential conflicts on Bit 7. The bits are defined as follows:
9.11.1 Bit 7
This bit is don’t care.
9.11.2 Bit 6 (-WTG)
This bit is ‘0’ when a write operation is in progress; otherwise, it is ‘1’.
9.11.3 Bit 5 (-HS3)
This bit is the negation of bit 3 in the Drive/Head register.
9.11.4 Bit 4 (-HS2)
This bit is the negation of bit 2 in the Drive/Head register.
9.11.5 Bit 3 (-HS1)
This bit is the negation of bit 1 in the Drive/Head register.
9.11.6 Bit 2 (-HS0)
This bit is the negation of bit 0 in the Drive/Head register.
9.11.7 Bit 1 (-nDS1)
This bit is ‘0’ when drive 1 is active and selected.
9.11.8 Bit 0 (-nDS0)
This bit is ‘0’ when the drive 0 is active and selected.
Table 53: Card (Drive) Address Register
D7
D6
D5
D4
D3
D2
D1
D0
X
-WTG
-HS3
-HS2
-HS1
-HS0
-nDS1
-nDS0
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10 CF-ATA command description
This section defines the software requirements and the format of the commands the Host sends to the Card.
Commands are issued to the Card by loading the required registers in the command block with the supplied
parameters, and then writing the command code to the Command Register. There are three classes of command
acceptance, all dependent on the host not issuing commands unless the Card is not busy (BSY is ‘0’).
Class 1: Upon receipt of a Class 1 command, the Card sets BSY within 400ns.
Class 2: Upon receipt of a Class 2 command, the Card sets BSY within 400ns, sets up the sector buffer for a
write operation, sets DRQ within 700µs, and clears BSY within 400ns of setting DRQ.
Class 3:Upon receipt of a Class 3 command, the Card sets BSY within 400ns, sets up the sector buffer for a
write operation, sets DRQ within 20ms (assuming no re-assignments), and clears BSY within 400ns of
setting DRQ.
For reasons of backward compatibility some commands are implemented as ‘no operation’ NOP.
Table 54
summarizes the CF-ATA command set with the paragraphs that follow describing the individual
commands and the task file for each.
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Table 54: CF-ATA Command Set (1)
Class
Command
Code
FR(1)
SC(2)
SN(3)
CY(5:4)
DH(6)
LBA(5:3)
1
Check Power Mode
E5h or 98h
D
2
Data Set Management
06h
YY
D
YY
1
Erase Sector(s)
C0h
Y
Y
Y
Y
Y
1
Execute Drive Diagnostic
90h
D
1
Flush cache
E7h
D
1
Flush cache Ext
EAh
D
2
Format track
50h
Y
Y
Y
Y
1
Identify Drive
ECh
D
1
Idle
E3h or 97h
Y
D
1
Idle Immediate
E1h or 95h
D
1
Initialize Drive Parameters
91h
Y
Y
1
Media Lock
DEh
D
1
Media Unlock
DFh
D
1
NOP
00h
D
1
Read Buffer
E4h
D
1
Read DMA
C8h
Y
Y
Y
Y
Y
1
Read DMA Ext
25h
YY
YY
YY
D
YY
1
Read Multiple
C4h
Y
Y
Y
Y
Y
1
Read Multiple Ext
29h
YY
YY
YY
D
YY
1
Read Sector(s)
20h or 21h
Y
Y
Y
Y
Y
1
Read Sector(s) Ext
24h
YY
YY
YY
D
YY
1
Read Verify Sector(s)
40h
Y
Y
Y
Y
Y
1
Read Verify Sector(s) Ext
42h
YY
YY
YY
D
YY
1
Recalibrate
1Xh
D
1
Request Sense
03h
D
1
Security Disable Password
F6h
D
1
Security Erase Prepare
F3h
D
1
Security Erase Unit
F4h
D
1
Security Freeze Lock
F5h
D
1
Security Set Password
F1h
D
1
Security Unlock
F2h
D
1
Seek
7Xh
Y
Y
Y
Y
1
Set Features
EFh
Y
D
1
Set Multiple Mode
C6h
Y
D
1
Set Sleep Mode
E6h or 99h
D
1
S.M.A.R.T.
B0h
Y
Y
Y
D
1
Stand By
E2h or 96h
D
1
Stand By Immediate
E0h or 94h
D
1
Translate Sector
87h
Y
Y
Y
Y
Y
2
Write Buffer
E8h
D
2
Write DMA
CAh
Y
Y
Y
Y
Y
2
Write DMA Ext
35h
YY
YY
YY
D
YY
3
Write Multiple
C5h
Y
Y
Y
Y
Y
3
Write Multiple Ext
39h
YY
YY
YY
D
YY
3
Write Multiple w/o Erase
CDh
Y
Y
Y
Y
Y
2
Write Sector(s)
30h or 31h
Y
Y
Y
Y
Y
2
Write Sector(s) Ext
34h
YY
YY
YY
D
YY
2
Write Sector(s) w/o Erase
38h
Y
Y
Y
Y
Y
3
Write Verify
3Ch
Y
Y
Y
Y
Y
1. FR = Features Register (1), SC = Sector Count Register (2), SN = Sector Number Register (3), CY = Cylinder Registers (5:4),
DH = Card/Drive/Head Register (6), LBA = Logical Block Address Mode Supported (see command descriptions for use),
Y – The register contains a valid parameter for this command. For the Drive/Head Register Y means both the CompactFlashTM
Memory Card and head parameters are used.
YY – registers must be written twice for 48bit LBA commands
D – only the Compact Flash Memory Card parameter is valid and not the head parameter C – the register contains command
specific data (see command descriptors for use).
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10.1 Check Power Mode (98h or E5h)
This command checks the power mode.
Issuing the command while the Card is in Standby mode, is about to enter Standby, or is exiting Standby, the
command will set BSY, set the Sector Count Register to 00h, clear BSY and generate an interrupt.
Issuing the command when the Card is in Idle mode will set BSY, set the Sector Count Register to FFh, clear BSY
and generate an interrupt.
Table 55
defines the Byte sequence of the Check Power Mode command.
Table 55: Check Power Mode
Task File Register
7
6
5
4
3
2
1
0
COMMAND
E5h (or Legacy 98h)
DRIVE/HEAD
nu
nu
nu
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
10.2 Data Set Management (06h) TRIM
This 48-bit command is optional for ATA devices. The DATA SETMANAGEMENT command is not part of any feature
set.
The DATA SET MANAGEMENT command provides information for device optimization (e.g., file system information).
See Table 56 for the DATA SET MANAGEMENT command inputs.
Table 56: Data Set Management
register write
previous
current
Task File Register
15:8
7
6
5
4
3
2
1
0
COMMAND
nu
06h
DRIVE/HEAD
nu
nu
L
nu
Transport
dependent
Reserved
LBA High
Reserved
LBA Mid
Reserved
LBA Low
Reserved
SECTOR COUNT
15:8
7:0 Number of 512-byte blocks to be transferred; the value of zero is reserved.
FEATURES
Reserved
TRIM
Currently this command is specified only for the TRIM command.
Currently only one 512-byte block can be transferred with one command (see Identify Device word 169).
Detailed information about the TRIM command is available in the ATA/ATAPI Command Set-2 (ACS-2) at
www.t13.org
10.3 Erase Sector(s) (C0h)
This command is used to pre-erase and condition data sectors prior to a Write Sector without Erase command or a
Write Multiple Without Erase command. There is no data transfer associated with this command but a Write Fault
error status can occur. Table 57
defines the Byte sequence of the Erase Sector command.
Table 57: Erase Sector(s)
Task File Register
7
6
5
4
3
2
1
0
COMMAND
C0h
DRIVE/HEAD
nu
L
nu
D
H[3:0] or LBA[27:24] of the starting
sector/LBA
CYLINDER HI
Cylinder[15:8] or LBA[23:16] of the first sector/LBA to erase
CYLINDER LOW
Cylinder[7:0] or LBA[15:8] of the first sector/LBA to erase
SECTOR NUM
Sector[7:0] or LBA[7:0] of the first sector/LBA to erase
SECTOR COUNT
The number of sectors/logical blocks to erase
FEATURES
nu
10.4 Execute Drive Diagnostic (90h)
This command performs the internal diagnostic tests implemented by the Card.
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In PCMCIA configuration, this command only runs on the Card which is addressed by the Drive/Head register when
the command is issued. This is because PCMCIA Card interface does not allow for direct inter-drive
communication.
In True IDE Mode, the Drive bit is ignored and the diagnostic command is executed by both the Master and the
Slave with the Master responding with the status for both devices.
Table 58
defines the Execute Drive Diagnostic command Byte sequence. The Diagnostic codes shown in Table 59
are returned in the Error Register at the end of the command.
Table 58: Execute Drive Diagnostic
Task File Register
7
6
5
4
3
2
1
0
COMMAND
90h
DRIVE/HEAD
nu
nu
nu
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
Table 59: Diagnostic Codes
Code
Error Type
01h
No Error Detected
02h
Formatter Device Error
03h
Sector Buffer Error
04h
ECC Circuitry Error
05h
Controlling Microprocessor Error
8Xh
Slave Error in True IDE Mode
10.5 Flush Cache (E7h)
This command causes the card to complete writing data from its cache. The card returns status with RDY=1 and
DSC=1 after the data in the write cache buffer is written to the media. If the Compact Flash Storage Card does not
support the Flush Cache command, the Compact Flash Storage Card shall return command aborted.
Table 60: Flush Cache
Task File Register
7
6
5
4
3
2
1
0
COMMAND
E7h
DRIVE/HEAD
nu
nu
nu
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
10.6 Flush Cache Ext (EAh) 48bit LBA
This command causes the card to complete writing data from its volatile cache into non-volatile memory. The BSY
bit shall remain set to one until all data has been successfully written or an error occurs. The card returns status
with RDY=1 and DSC=1 after the data in the write cache buffer is written to the media. If the Compact Flash
Storage Card does not support the Flush Cache Ext command, the Compact Flash Storage Card shall return
command aborted. See Table 61 for the DATA SET MANAGEMENT command inputs.
Table 61: Flush cache Ext
register write
previous
current
Task File Register
15:8
7
6
5
4
3
2
1
0
COMMAND
-
EAh
DRIVE/HEAD
-
1
1
1
Drive
Reserved
LBA High
nu
nu
LBA Mid
nu
nu
LBA Low
nu
nu
SECTOR COUNT
nu
nu
FEATURES
nu
nu
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An unrecoverable error encountered while writing data results in aborting the command and the Command Block
registers contain the 48 –bit sector address of the sector where the first unrecoverable error occurred. Subsequent
FLUSH CACHE EXT commands continue the process of flushing the cache starting with the first sector after the
sector in error.
This command is used by the host to request the device to flush the write cache. If there is data in the write
cache, that data shall be written to the media. The BSY bit shall remain set to one until all data has been
successfully written or an error occurs.
10.7 Format track (50h)
This command writes the desired head and cylinder of the selected drive with a vendor unique data pattern
(typically FFh or 00h). To remain host backward compatible, the CompactFlashTM Storage Card expects a sector
buffer of data from the host to follow the command with the same protocol as the Write Sector(s) command
although the information in the buffer is not used by the CompactFlashTM Storage Card. If LBA=1 then the number
of sectors to format is taken from the Sec Cnt register (0=256). The use of this command is not recommended.
Table 62: Format track
Task File Register
7
6
5
4
3
2
1
0
COMMAND
50h
DRIVE/HEAD
nu
L
nu
D
H[3:0] or LBA[27:24] of the starting
sector/LBA
CYLINDER HI
Cylinder[15:8] or LBA[23:16] of the first sector/LBA
CYLINDER LOW
Cylinder[7:0] or LBA[15:8] of the first sector/LBA
SECTOR NUM
nu
SECTOR COUNT
Sector Count (LBA only)
FEATURES
nu
10.8 Identify Device (ECh)
The Identify Device command enables the host to receive parameter information from the Card. This command
has the same protocol as the Read Sector(s) command. Table 63
defines the Identify Device command Byte
sequence. All reserved bits or Words are zero.
Identify Device table shows the definition of each field in the Identify Drive Information.
Table 63: Identify Device
Task File Register
7
6
5
4
3
2
1
0
COMMAND
ECh
DRIVE/HEAD
nu
nu
nu
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
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Table 64: Identify Device Information
Word
Address
Default
Value
Total
Bytes
Data Field Type Information
0
848Ah*
2
General Configuration (REMOVABLE, signature of the CompactFlashTM Memory Card) In
PC card mode the HxBU cards have normally the value 848Ah
but other configurations are possible
045Ah*
2
Alternate Configuration FIX,
In IDE mode the HxBU cards have normally the value 045Ah
but other configurations are possible
1
XXXXh
2
Default number of cylinders
2
0000h
2
Reserved
3
00XXh
2
Default number of heads
4
0000h
2
Obsolete
5
0200h
2
Obsolete
6
XXXXh
2
Default number of sectors per track
7-8
XXXXh
4
Number of sectors per Card (Word 7 = MSW, Word 8 = LSW)
9
0000h
2
Obsolete
10-19
aaaa
20
Serial number in ASCII (right justified)
20
0002h
2
Buffer type
21
0001h
2
Buffer size
22
0004h
2
Reserved
23-26
aaaa*
8
Firmware revision in ASCII. Big Endian Byte Order in Word
27-46
aaaa*
40
Model number in ASCII (right justified) Big Endian Byte Order in Word
(“SFCFxxxxHxBUxTO-x-xx-xxx-xxx”)
47
8001h
2
Maximum number of sectors on Read/Write Multiple command
48
0000h
2
Reserved
49
0F00h*
0E00h*
2
Capabilities with DMA
without DMA
50
4001h
2
Capabilities: device specific standby timer minimum
51
0200h
2
PIO data transfer cycle timing mode
52
0000h
2
Obsolete
53
0007h*
2
Field validity
54
XXXXh
2
Current numbers of cylinders
55
XXXXh
2
Current numbers of heads
56
XXXXh
2
Current sectors per track
57-58
XXXXh
4
Current capacity in sectors (cylinders*heads*sectors)(Word 57 = LSW, Word 58 = MSW)
59
010Xh
2
Multiple sector setting is valid
60-61
XXXXh
4
Total number of sectors addressable in LBA Mode
62
0000h
2
Single-Word DMA not implemented
63
0007h*
0000h*
2
Multi-Word DMA transfer Mode 0, 1, 2
for In PC card mode, this value is ‘0000h’.
64
0003h
2
Advanced PIO modes supported
65
0078h*
0000h*
2
Minimum Multi-Word DMA transfer cycle time per Word.
66
0078h*
0000h*
2
Recommended Multi-Word DMA transfer cycle time.
67
0078h*
2
Minimum PIO transfer cycle time without flow control
68
0078h*
2
Minimum PIO transfer cycle time with IORDY flow control
69-79
0000h
22
Reserved
80-81
01E0h
0000h
4
ATA version 5,6,7,8
82 -84
702Bh*
7405h*
4020h*
6
Features/command sets supported
85-87
7009h*
3405h*
4000h*
6
Features/command sets enabled
88
207Fh*
2
Ultra DMA Mode 0,1,2,3,4,5,6 Supported and Selected (changes in operation)
89
0000h
2
Time required for Security erase unit completion
90
0000h
2
Time required for Enhanced security erase unit completion
91
0000h
2
Current Advanced power mana9ementvalue
92
FFFEh*
2
Master Password Revision Code
93
XXXXh*
0000h
2
Hardware reset result, 0000h in PC card mode
94-99
0000h
12
Reserved
100-103
XXXXh
8
Total number of sectors addressable in LBA48 mode
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Word
Address
Default
Value
Total
Bytes
Data Field Type Information
104
0000h
2
Reserved
105
0001h
2
Number of sectors per Data Set Management command
106-107
0000h
4
Reserved
108-111
0000h*
8
World Wide Name
112-127
0000h*
36
Reserved
128
0XXXh*
2
Security status
129
XX00h
2
Write Protect Status
130-159
0000h
60
vendor unique bytes
160
A064h*
2
Power requirement description (100mA)*
161
0000h
2
Reserved for assignment by the CFA
162
0000h
2
Key management schemes not supported
163
0012h*
2
CF Advanced True lDE Timing Mode Capability and Setting (PIO6/MDMA4)*
164
001Bh*
8D9Bh*
2
CF Advanced PC card I/O and Memory Timing Mode Capability
165-168
0000h
8
Reserved
169
0001h
2
Trim bit in Data Set Management supported
170-216
0000h
94
Reserved
217
0001h
2
Solid State Device (non-rotating media)
218-254
0000h
74
Reserved
255
XXA5
2
Integrity Word
* Standard values for full functionality, depending on configuration
XXXX Depending on Card capacity and drive geometry
10.8.1 Word 0: General Configuration
This field indicates the general characteristics of the device.
The default value for Word 0 is set to 848Ah. It is recommended that PC card modes of operation report only the
848Ah value as they are always intended as removable devices.
Alternate Configuration Values for Word 0 is 045Ah.
Some operating systems require Bit 6 of Word 0 to be set to ‘1’ (Non-removable device) to use the Card as the root
storage device. The Card must be the root storage device when a host completely replaces conventional disk
storage with a CompactFlashTM Card in True IDE mode. To support this requirement and provide capability for any
future removable media cards, alternate value of Word 0 is set in True IDE Mode of operation.
10.8.2 Word 1: Default Number of Cylinders
This field contains the number of translated cylinders in the default translation mode. This value will be the same
as the number of cylinders.
10.8.3 Word 3: Default Number of Heads
This field contains the number of translated heads in the default translation mode.
10.8.4 Word 6: Default Number of Sectors per Track
This field contains the number of sectors per track in the default translation mode.
10.8.5 Word 7-8: Number of Sectors per Card
This field contains the number of sectors per Card. This double Word value is also the first invalid address in LBA
translation mode.
10.8.6 Word 10-19: Memory Card Serial Number
The contents of this field are right justified and padded without spaces (20h).
10.8.7 Word 23-26: Firmware Revision
This field contains the revision of the firmware for this product.
10.8.8 Word 27-46: Model Number
This field contains the model number for this product and is left justified and padded with spaces (20h).
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10.8.9 Word 47: Read/Write Multiple Sector Count
This field contains the maximum number of sectors that can be read or written per interrupt using the Read
Multiple or Write Multiple commands.
10.8.10 Word 49: Capabilities
Bit 13 Standby Timer: is set to ’0’ to indicate that the Standby timer operation is defined by the
manufacturer.
Bit 11: IORDY Supported
If bit 11 is set to 1 then this CompactFlashTM Storage Card supports IORDY operation.
If bit 11 is set to 0 then this CompactFlashTM Storage Card may support IORDY operation.
Bit 10: IORDY may be disabled
Bit 10 shall be set to 0, indicating that IORDY may not be disabled.
Bit 9 LBA support: CompactFlashTM Memory Cards support LBA mode addressing.
Bit 8 DMA Support: Read/Write DMA commands are supported.
10.8.11 Word 51: PIO Data Transfer Cycle Timing Mode
This field defines the mode for PIO data transfer. For backward compatibility with BIOSs written before Word 64
was defined for advanced modes, a device reports in Word 51, the highest original PIO mode it can support (PIO
mode 0, 1 or 2). Bits 15:8: are set to 02H.
10.8.12 Word 53: Translation Parameter Valid
Bit 0: is set to ‘1’ to indicate that Words 54 to 58 are valid
Bit 1: is set to ‘1’ to indicate that Words 64 to 70 are valid
Bit 2 shall be set to 1 indicating that word 88 is valid and reflects the supported True IDE UDMA
10.8.13 Word 54-56: Current Number of Cylinders, Heads, Sectors/Track
These fields contain the current number of user addressable Cylinders, Heads, and Sectors/Track in the current
translation mode.
10.8.14 Word 57-58: Current Capacity
This field contains the product of the current cylinders, heads and sectors.
10.8.15 Word 59: Multiple Sector Setting
Bits 15-9 are reserved and must be set to ‘0’.
Bit 8 is set to ‘1’, to indicate that the Multiple Sector Setting is valid.
Bits 7-0 are the current setting for the number of sectors to be transferred for every interrupt, on
Read/Write Multiple commands; the only values returned are ‘00h’ or ‘01h’.
10.8.16 Word 60-61: Total Sectors Addressable in LBA Mode
This field contains the number of sectors addressable for the Card in LBA mode only.
10.8.17 Word 63: Multi-Word DMA transfer
Bits 15 through 8 of word 63 of the Identify Device parameter information is defined as the Multiword DMA mode
selected field. If this field is supported, bit 1 of word 53 shall be set to one. This field is bit significant. Only one of
bits may be set to one in this field by the CompactFlashTM Storage Card to indicate the multiword DMA mode which
is currently selected.
Of these bits, bits 15 through 11 are reserved. Bit 8, if set to one, indicates that Multiword DMA mode 0 has been
selected. Bit 9, if set to one, indicates that Multiword DMA mode 1 has been selected. Bit 10, if set to one,
indicates that Multiword DMA mode 2 has been selected.
Selection of Multiword DMA modes 3 and above are specific to CompactFlashTM are reported in word 163 as
described in Word 163.
Bits 7 through 0 of word 63 of the Identify Device parameter information is defined as the Multiword DMA data
transfer supported field. If this field is supported, bit 1 of word 53 shall be set to one. This field is bit significant.
Any number of bits may be set to one in this field by the CompactFlashTM Storage Card to indicate the Multiword
DMA modes it is capable of supporting.
Of these bits, bits 7 through 2 are reserved. Bit 0, if set to one, indicates that the CompactFlashTM Storage Card
supports Multiword DMA mode 0. Bit 1, if set to one, indicates that the CompactFlashTM Storage Card supports
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Multiword DMA modes 1 and 0. Bit 2, if set to one, indicates that the CompactFlashTM Storage Card supports
Multiword DMA modes 2, 1 and 0.
Support for Multiword DMA modes 3 and above are specific to CompactFlashTM are reported in word 163 as
described in Word 163.
10.8.18 Word 64: Advanced PIO transfer modes supported
This field is bit significant. Any number of bits may be set to ‘1’ in this field by the CompactFlashTM Memory Card to
indicate the advanced PIO modes it is capable of supporting.
3 Bits 7-2 are reserved for future advanced PIO modes.
4 Bit 1 is set to ‘1’, indicates that the CompactFlashTM Memory Card supports PIO mode 4.
5 Bit 0 is set to ‘1’ to indicate that the CompactFlashTM Memory Card supports PIO mode 3.
Support for PIO modes 5 and above are specific to CompactFlashTM are reported in word 163 as described in Word
163.
10.8.19 Word 65: Minimum Multi-Word DMA transfer cycle time
Word 65 of the parameter information of the Identify Device command is defined as the minimum Multiword DMA
transfer cycle time. This field defines, in nanoseconds, the minimum cycle time that, if used by the host, the
CompactFlashTM Storage Card guarantees data integrity during the transfer.
If this field is supported, bit 1 of word 53 shall be set to one. The value in word 65 shall not be less than the
minimum cycle time for the fastest DMA mode supported by the device. This field shall be supported by all
CompactFlashTM Storage Cards supporting DMA modes 1 and above. If bit 1 of word 53 is set to one, but this field is
not supported, the Card shall return a value of zero in this field.
10.8.20 Word 66: Recommended Multi-Word DMA transfer cycle time
Word 66 of the parameter information of the Identify Device command is defined as the recommended Multiword
DMA transfer cycle time. This field defines, in nanoseconds, the cycle time that, if used by the host, may optimize
the data transfer from by reducing the probability that the CompactFlashTM Storage Card will need to negate the
DMARQ signal during the transfer of a sector.
If this field is supported, bit 1 of word 53 shall be set to one. The value in word 66 shall not be less than the value
in word 65. This field shall be supported by all CompactFlashTM Storage Cards supporting DMA modes 1 and above.
If bit 1 of word 53 is set to one, but this field is not supported, the Card shall return a value of zero in this field.
10.8.21 Word 67: Minimum PIO transfer cycle time without flow control
Word 67 of the parameter information of the Identify Device command is defined as the minimum PIO transfer
without flow control cycle time. This field defines, in nanoseconds, the minimum cycle time that, if used by the
host, the CompactFlashTM Storage Card guarantees data integrity during the transfer without utilization of flow
control.
If this field is supported, Bit 1 of word 53 shall be set to one.
Any CompactFlashTM Storage Card that supports PIO mode 3 or above shall support this field, and the value in word
67 shall not be less than the value reported in word 68.
If bit 1 of word 53 is set to one because a CompactFlashTM Storage Card supports a field in words 64-70 other than
this field and the CompactFlashTM Storage Card does not support this field, the CompactFlashTM Storage Card shall
return a value of zero in this field.
10.8.22 Word 68: Minimum PIO transfer cycle time with IORDY
Word 68 of the parameter information of the Identify Device command is defined as the minimum PIO transfer
with IORDY flow control cycle time. This field defines, in nanoseconds, the minimum cycle time that the
CompactFlashTM Storage Card supports while performing data transfers while utilizing IORDY flow control.
If this field is supported, Bit 1 of word 53 shall be set to one.
Any CompactFlashTM Storage Card that supports PIO mode 3 or above shall support this field, and the value in word
68 shall be the fastest defined PIO mode supported by the CompactFlashTM Storage Card.
If bit 1 of word 53 is set to one because a CompactFlashTM Storage Card supports a field in words 64-70 other than
this field and the CompactFlashTM Storage Card does not support this field, the CompactFlashTM Storage Card shall
return a value of zero in this field.
10.8.23 Words 82-84: Features/command sets supported
Words 82, 83, and 84 shall indicate features/command sets supported. The value 0000h or FFFFh was placed in
each of these words by CompactFlashTM Storage Cards prior to ATA-3 and shall be interpreted by the host as
meaning that features/command sets supported are not indicated. Bits 1 through 13 of word 83 and bits 0 through
13 of word 84 are reserved. Bit 14 of word 83 and word 84 shall be set to one and bit 15 of word 83 and word 84
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shall be cleared to zero to provide indication that the features/command sets supported words are valid. The
values in these words should not be depended on by host implementers.
If bit 0 of word 82 is set to one, the SMART feature set is supported.
If bit 1 of word 82 is set to one, the Security Mode feature set is supported.
Bit 2 of word 82 shall be set to zero; the Removable Media feature set is not supported.
Bit 3 of word 82 shall be set to one; the Power Management feature set is supported.
Bit 4 of word 82 shall be set to zero; the Packet Command feature set is not supported.
If bit 5 of word 82 is set to one, write cache is supported.
If bit 6 of word 82 is set to one, look-ahead is supported.
Bit 7 of word 82 shall be set to zero; release interrupt is not supported.
Bit 8 of word 82 shall be set to zero; Service interrupt is not supported.
Bit 9 of word 82 shall be set to zero; the Device Reset command is not supported.
Bit 10 of word 82 shall be set to zero; the Host Protected Area feature set is not supported.
Bit 11 of word 82 is obsolete.
Bit 12 of word 82 shall be set to one; the CompactFlashTM Storage Card supports the Write Buffer command.
Bit 13 of word 82 shall be set to one; the CompactFlashTM Storage Card supports the Read Buffer command.
Bit 14 of word 82 shall be set to one; the CompactFlashTM Storage Card supports the NOP command.
Bit 15 of word 82 is obsolete.
Bit 0 of word 83 shall be set to zero; the CompactFlashTM Storage Card does not support the Download
Microcode command.
Bit 1 of word 83 shall be set to zero; the CompactFlashTM Storage Card does not support the Read DMA
Queued and Write DMA Queued commands.
Bit 2 of word 83 shall be set to one; the CompactFlashTM Storage Card supports the CFA feature set.
If bit 3 of word 83 is set to one, the CompactFlashTM Storage Card supports the Advanced Power
Management feature set.
Bit 4 of word 83 shall be set to zero; the CompactFlashTM Storage Card does not support the Removable
Media Status feature set.
Bit 5 of Word 83 shall be cleared to zero; the Power Up in Standby feature set is not supported.
Bit 6 of Word 83 shall be cleared to zero; Set Features subcommand requirement to spin-up after power-
up is not supported.
Bit 7 of Word 83 shall be cleared to zero
Bit 8 of Word 83 shall be cleared to zero; the SET MAX security extension is not supported.
Bit 9 of Word 83 shall be cleared to zero; automatic acoustic management is not supported.
Bit 10 of word 83 shall be set to one, the 48-bit Address feature is supported,
Bit 11 of Word 83 shall be cleared to zero; the DCO feature set is not supported.
Bit 12 of Word 83 shall be set to one; the Flush Cache command is supported.
Bit 13 of Word 83 shall be set to one, the 48-bit Address feature including the Flush Cache Ext command is
supported.
Bit 14 of Word 83 shall be set to one.
Bit 15 of Word 83 shall be cleared to zero.
Bit 0 of Word 84 shall be cleared to zero; SMART error logging is not supported.
Bit 1 of Word 84 shall be cleared to zero; SMART self-test is not supported.
Bit 2 of Word 84 shall be cleared to zero; Media serial number is not supported.
Bit 3 of Word 84 shall be cleared to zero; Media Card Pass Through feature set not supported.
Bit 4 of Word 84 shall be cleared to zero.
Bit 5 of Word 84 shall be set to one if General Purpose Logging feature set is supported, or cleared to zero
if the General Purpose Logging feature is not supported.
Bit 6 of word 84 shall be set to one if the WRITE DMA FUA EXT and WRITE MULTIPLE FUA EXT commands are
supported, or cleared to zero if they are not supported.
Bit 7 of word 84 shall be cleared to zero. The CompactFlashTM Storage Card does not support the WRITE DMA
QUEUED FUA EXT command.
Bit 8 of word 84 shall be cleared to zero. The CompactFlashTM Storage Card does not support a world-wide
name.
Bit 9 of word 84 shall be cleared to zero. The CompactFlashTM Storage Card does not support the Streaming
feature set.
Bit 10 of word 84 shall be cleared to zero. The CompactFlashTM Storage Card does not support the
Streaming feature set.
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Bit 11 of word 84 is reserved.
Bit 12 of word 84 is reserved.
Bit 13 of word 84 shall be cleared to zero. The CompactFlashTM Storage Card does not support IDLE
IMMEDIATE with UNLOAD FEATURE.
Bit 14 of Word 84 shall be set to one.
Bit 15 of Word 84 shall be cleared to zero.
10.8.24 Words 85-87: Features/command sets enabled
Words 85, 86, and 87 shall indicate features/command sets enabled. The value 0000h or FFFFh was placed in
each of these words by CompactFlashTM Storage Cards prior to ATA-4 and shall be interpreted by the host as
meaning that features/command sets enabled are not indicated. Bits 1 through 15 of word 86 are reserved. Bits 0-
13 of word 87 are reserved. Bit 14 of word 87 shall be set to one and bit 15 of word 87 shall be cleared to zero to
provide indication that the features/command sets enabled words are valid. The values in these words should not
be depended on by host implementers.
If bit 0 of word 85 is set to one; the SMART feature set is enabled.
Bit 0 can be changed by the host and is not reset after power cycle
If bit 1 of word 85 is set to one, the Security Mode feature set has been enabled via the Security
Set Password command.
Bit 2 of word 85 shall be set to zero; the Removable Media feature set is not supported.
Bit 3 of word 85 shall be set to one; the Power Management feature set is supported.
Bit 4 of word 85 shall be set to zero; the Packet Command feature set is not enabled.
If bit 5 of word 85 is set to one, write cache is enabled.
If bit 6 of word 85 is set to one, look-ahead is enabled.
Bit 7 of word 85 shall be set to zero; release interrupt is not enabled.
Bit 8 of word 85 shall be set to zero; Service interrupt is not enabled.
Bit 9 of word 85 shall be set to zero; the Device Reset command is not supported.
Bit 10 of word 85 shall be set to zero; the Host Protected Area feature set is not supported.
Bit 11 of word 85 is obsolete.
Bit 12 of word 85 shall be set to one; the CompactFlashTM Storage Card supports the Write Buffer command.
Bit 13 of word 85 shall be set to one; the CompactFlashTM Storage Card supports the Read Buffer command.
Bit 14 of word 85 shall be set to one; the CompactFlashTM Storage Card supports the NOP command.
Bit 15 of word 85 is obsolete.
Bit 0 of word 86 shall be set to zero; the CompactFlashTM Storage Card does not support the Download
Microcode command.
Bit 1 of word 86 shall be set to zero; the CompactFlashTM Storage Card does not support the Read DMA
Queued and Write DMA Queued commands.
If bit 2 of word 86 shall be set to one, the CompactFlashTM Storage Card supports the CFA feature set.
If bit 3 of word 86 is set to one, the Advanced Power Management feature set has been enabled via the
Set Features command.
Bit 4 of word 86 shall be set to zero; the CompactFlashTM Storage Card does not support the Removable
Media Status feature set.
Bit 5 of word 86 shall be cleared to zero. The PUIS feature set is not supported.
Bit 6 of word 86 shall be cleared to zero. The PUIS feature set is not supported.
Bit 7 of word 86 is reserved for ATA.
Bit 8 of word 86 shall be cleared to zero. The ATA Security Extension is not supported.
Bit 9 of word 86 shall be cleared to zero. The AAM feature set is not supported.
Bit 10 of word 86 is set to one, the 48-bit Address feature set is supported.
Bit 11 of word 86 shall be cleared to zero. The DCO feature set is not supported.
If bit 12 is set to one, the Flush Cache command is supported.
If bit 13 is set to one, the Flush Cache Ext command is supported.
Bit 14 of word 86 is reserved for ATA.
Bit 15 of word 86 shall be set to one indicating that words 119 and 120 are valid.
Bit 0 of word 87 shall be cleared to zero. The CompactFlashTM Card does not support SMART error logging.
Bit 1 of word 87 shall be cleared to zero. The CompactFlashTM Card does not support SMART self-test.
Bit 2 of word 87 shall be cleared to zero. The CompactFlashTM Card does not support the media serial
number field in words (205:176).
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Bit 3 of word 87 shall be cleared to zero. The CompactFlashTM Card does not support the Media Card Pass
Through feature.
Bit 4 of word 87 shall be cleared to zero. The CompactFlashTM Card does not support the Streaming feature
set.
Bit 5 of word 87 shall be set to one if the CompactFlashTM Storage Card supports the General Purpose
Logging feature set, or cleared to zero if the General Purpose Logging feature is not supported.
Bit 6 of word 87 shall be set to one if the WRITE DMA FUA EXT and WRITE MULTIPLE FUA EXT commands are
supported, or cleared to zero if they are not supported.
Bit 7 of word 87 shall be cleared to zero. The CompactFlashTM Card does not support the WRITE DMA QUEUED
FUA EXT command.
Bit 8 of word 87 shall be cleared to zero. The CompactFlashTM Card does not support a world wide name.
Bit 9 of word 87 shall be cleared to zero. The CompactFlashTM Card does not support the Streaming feature
set.
Bit 10 of word 87 shall be cleared to zero. The CompactFlashTM Card does not support the Streaming feature
set.
Bit 11 of word 87 is reserved.
Bit 12 of word 87 is reserved.
Bit 13 of word 87 shall be cleared to zero. The CompactFlashTM Card does not support IDLE IMMEDIATE with
UNLOAD FEATURE.
Bit 14 of word 87 shall be set to one and bit 15 of word 87 shall be cleared to zero to provide indication
that the features/command sets enabled words are valid.
10.8.25 Word 88: True IDE Ultra DMA Modes Supported and Selected
Word 88 identifies the Ultra DMA transfer modes supported by the device and indicates the mode that is currently
selected. Only one DMA mode shall be selected at any given time. If an Ultra DMA mode is selected, then no
Multiword DMA mode shall be selected. If a Multiword DMA mode is selected, then no Ultra DMA mode shall be
selected. Support of this word is mandatory if Ultra DMA is supported. Word 88 shall return a value of 0 if the
device is not in True IDE mode or if it does not support UDMA in True IDE Mode.
Bit 15: Reserved
Bit 14: 1 = Ultra DMA mode 6 is selected 0 = Ultra DMA mode 6 is not selected
Bit 13: 1 = Ultra DMA mode 5 is selected 0 = Ultra DMA mode 5 is not selected
Bit 12: 1 = Ultra DMA mode 4 is selected 0 = Ultra DMA mode 4 is not selected
Bit 11: 1 = Ultra DMA mode 3 is selected 0 = Ultra DMA mode 3 is not selected
Bit 10: 1 = Ultra DMA mode 2 is selected 0 = Ultra DMA mode 2 is not selected
Bit 9: 1 = Ultra DMA mode 1 is selected 0 = Ultra DMA mode 1 is not selected
Bit 8: 1 = Ultra DMA mode 0 is selected 0 = Ultra DMA mode 0 is not selected
Bit 7: Reserved
Bit 6: 1 = Ultra DMA mode 6 and below are supported. Bits 0-5 shall be set to 1.
Bit 5: 1 = Ultra DMA mode 5 and below are supported. Bits 0-4 shall be set to 1.
Bit 4: 1 = Ultra DMA mode 4 and below are supported. Bits 0-3 shall be set to 1.
Bit 3: 1 = Ultra DMA mode 3 and below are supported, Bits 0-2 shall be set to 1.
Bit 2: 1 = Ultra DMA mode 2 and below are supported. Bits 0-1 shall be set to 1.
Bit 1: 1 = Ultra DMA mode 1 and below are supported. Bit 0 shall be set to 1.
Bit 0: 1 = Ultra DMA mode 0 is supported
10.8.26 Word 92: Master Password Revision Code
Word 92 contains the value of the Master Password Revision Code set when the Master Password was last
changed. Valid values are 0001h through FFFEh. A value of 0000h or FFFFh indicates that the Master Password
Revision is not supported. Support of this word is mandatory if the Security feature set is supported.
10.8.27 Words 100-103: Maximum user LBA for 48-bit address feature set
Words (103-100) contain a value that is one greater than the maximum LBA in user addressable space using 48-bit
Addressing. The maximum value that shall be placed in this field is 0000FFFFFFFFFFFFh. Support of these words is
mandatory.
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10.8.28 Word 105: Maximum number of 512-byte blocks of LBA Range Entries used by the Trim feature of
the Data Set Management command
Word 105 contains the maximum number of 512-byte blocks of LBA Range Entries included with the Trim feature of
the Data Set Management command that the CompactFlashTM device shall accept. A value of 0000h indicates that
the maximum number of 512-byte blocks is not specified.
10.8.29 Word 128: Security Status
Bit 8: Security Level
If set to one indicates that security mode is enabled and the security level is maximum. If cleared to zero
and security mode is enabled, indicates that the security level is high.
Bit 5: Enhanced security erase unit feature supported
If set to one, indicates that the Enhanced security erase unit feature set is supported.
Bit 4: Expire
If set to one, indicates that the security count has expired and Security Unlock and Security Erase Unit are
command aborted until a power-on reset or hard reset.
Bit 3: Freeze
If set to one, indicates that the security is Frozen.
Bit 2: Lock
If set to one, indicates that the security is locked.
Bit 1: Enable/Disable
If set to one, indicates that the security is enabled. If cleared to zero, indicates that the security is
disabled.
Bit 0: Capability
If set to one, indicates that CompactFlashTM Storage Card supports security mode feature set. If cleared to
zero, indicates that CompactFlashTM Card does not support security mode feature set.
10.8.30 Word 160: Power Requirement Description
This word is required for CompactFlashTM Storage Cards that support power mode 1.
Bit 15: VLD
If set to 1, indicates that this word contains a valid power requirement description.
If set to 0, indicates that this word does not contain a power requirement description.
Bit 14: RSV
This bit is reserved and shall be 0.
Bit 13: -XP
If set to 1, indicates that the CompactFlashTM Storage Card does not have Power Level 1 commands.
If set to 0, indicates that the CompactFlashTM Storage Card has Power Level 1 commands
Bit 12: -XE
If set to 1, indicates that Power Level 1 commands are disabled.
If set to 0, indicates that Power Level 1 commands are enabled.
Bit 0-11: Maximum current
This field contains the CompactFlashTM Storage Card’s maximum current in mA.
10.8.31 Word 163: Advanced True IDE Timing mode capabilities and settings
This word describes the capabilities and current settings for CFA defined advanced timing modes using the True
IDE interface.
Notice! The use of True IDE PIO Modes 5 and above or of Multiword DMA Modes 3 and
above impose significant restrictions on the implementation of the host as indicated in
section 5.3 : Additional Requirements for CF Advanced Timing Modes.
There are four separate fields defined that describe support and selection of Advanced PIO timing modes and
Advanced Multiword DMA timing modes. The older modes are reported in words 63 and 64.
Bits 2-0: Advanced True IDE PIO Mode Support
Indicates the maximum True IDE PIO mode supported by the card.
0 Specified in word 64
1 PIO Mode 5
2 PIO Mode 6
3-7 Reserved
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Bits 5-3: Advanced True IDE Multiword DMA Mode Support
indicates the maximum True IDE Multiword DMA mode supported by the card.
0 Specified in word 63
1 Multiword DMA Mode 3
2 Multiword DMA Mode 4
3-7 Reserved
Bits 8-6: Advanced True IDE PIO Mode Selected
indicates the current True IDE PIO mode selected on the card.
0 Specified in word 64
1 PIO Mode 5
2 PIO Mode 6
3-7 Reserved
Bits 11-9: Advanced True IDE Multiword DMA Mode Selected
indicates the current True IDE Multiword DMA Mode Selected on the card.
0 Specified in word 63
1 Multiword DMA Mode 3
2 Multiword DMA Mode 4
3-7 Reserved
Bits 15-12 are reserved.
10.8.32 Word 164: Advanced PC card I/O and Memory Timing modes capabilities and settings
This word describes the capabilities and current settings for CFA defined advanced timing modes using the
Memory and PC Card I/O interface.
Notice! The use of PC Card I/O or Memory modes that are 100ns or faster impose
significant restrictions on the implementation of the host as indicated in
section 5.3 : Additional Requirements for CF Advanced Timing Modes.
Bits 2-0: Maximum Advanced PC Card I/O Mode Support
Indicates the maximum I/O timing mode supported by the card.
0 255 ns Cycle PC Card I/O Mode
1 120 ns Cycle PC Card I/O Mode
2 100 ns Cycle PC Card I/O Mode
3 80 ns Cycle PC Card I/O Mode
4-7 Reserved
Bits 5-3: Maximum Memory timing mode supported
Indicates the Maximum Memory timing mode supported by the card.
0 250 ns Cycle Memory Mode
1 120 ns Cycle Memory Mode
2 100 ns Cycle Memory Mode
3 80 ns Cycle Memory Mode
4-7 Reserved
Bits 8-6: Maximum PC Card I/O UDMA timing mode supported
Indicates the Maximum PC Card I/O UDMA timing mode supported by the card when bit 15 is set.
0 PC Card I/O UDMA mode 0 supported
1 PC Card I/O UDMA mode 1 supported
2 PC Card I/O UDMA mode 2 supported
3 PC Card I/O UDMA mode 3 supported
4 PC Card I/O UDMA mode 4 supported
5 PC Card I/O UDMA mode 5 supported
6 PC Card I/O UDMA mode 6 supported
7 Reserved
Bits 11-9: Maximum PC Card Memory UDMA timing mode supported
Indicates the Maximum PC Card Memory UDMA timing mode supported by the card when bit 15 is set.
0 PC Card Memory UDMA mode 0 supported
1 PC Card Memory UDMA mode 1 supported
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2 PC Card Memory UDMA mode 2 supported
3 PC Card Memory UDMA mode 3 supported
4 PC Card Memory UDMA mode 4 supported
5 PC Card Memory UDMA mode 5 supported
6 PC Card Memory UDMA mode 6 supported
7 Reserved
Bits 14-12: PC Card Memory or I/O UDMA timing mode selected
Indicates the PC Card Memory or I/O UDMA timing mode selected by the card.
0 PC Card I/O UDMA mode 0 selected
1 PC Card I/O UDMA mode 1 selected
2 PC Card I/O UDMA mode 2 selected
3 PC Card I/O UDMA mode 3 selected
4 PC Card I/O UDMA mode 4 selected
5 PC Card I/O UDMA mode 5 selected
6 PC Card I/O UDMA mode 6 selected
7 Reserved
Bit 15: PC Card Memory and IO Modes Supported
10.8.33 Word 169: Data Set Management Support
Bits 15-1: reserved
Bit 0: shall be set to one to indicate support of the Trim bit of the Data Set Management command.
10.9 Idle (97h or E3h)
This command causes the Card to set BSY, enter the Idle mode, clear BSY and generate an interrupt. If the sector
count is non-zero, it is interpreted as a timer count (each count is 5ms) and the automatic power down mode is
enabled. If the sector count is zero, the automatic power down mode is disabled. Note that this time base (5ms)
is different from the ATA specification. If no Idle command is performed, the card goes to sleep mode after 20ms.
Table 65
defines the Byte sequence of the Idle command.
Table 65: Idle
Task File Register
7
6
5
4
3
2
1
0
COMMAND
97h or E3h
DRIVE/HEAD
nu
nu
nu
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
Timer Count (5ms increments)
FEATURES
nu
10.10 Idle Immediate (95h or E1h)
This command causes the Card to set BSY, enter the Idle mode, clear BSY and generate an interrupt. Table 66
defines the Idle Immediate command Byte sequence.
Table 66: Idle Immediate
Task File Register
7
6
5
4
3
2
1
0
COMMAND
95h or E1h
DRIVE/HEAD
nu
nu
nu
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
10.11 Initialize Drive Parameters (91h)
This command enables the host to set the number of sectors per track and the number of heads per cylinder. Only
the Sector Count and the Card/Drive/Head registers are used by this command. Table 67 defines the Initialize Drive
Parameters command Byte sequence.
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Table 67: Initialize Drive Parameters
Task File Register
7
6
5
4
3
2
1
0
COMMAND
91h
DRIVE/HEAD
nu
nu
nu
D
Number of Heads minus 1
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
Number of Sectors per Track
FEATURES
nu
10.12 NOP (00h)
This command always fails with the CompactFlashTM Memory Card returning command aborted. Table 68
defines
the Byte sequence of the NOP command.
Table 68: NOP
Task File Register
7
6
5
4
3
2
1
0
COMMAND
00h
DRIVE/HEAD
nu
nu
nu
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
10.13 Read Buffer (E4h)
The Read Buffer command enables the host to read the current contents of the Card’s sector buffer. This command
has the same protocol as the Read Sector(s) command. Table 69 defines the Read Buffer command Byte sequence.
Table 69: Read buffer
Task File Register
7
6
5
4
3
2
1
0
COMMAND
E4h
DRIVE/HEAD
nu
nu
nu
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
10.14 Read DMA (C8h)
This command uses DMA mode to read from 1 to 256 sectors as specified in the Sector Count register. A sector
count of 0 requests 256 sectors. The transfer begins at the sector specified in the Sector Number Register. When
this command is issued the CompactFlashTM Storage Card sets BSY, puts all or part of the sector of data in the
buffer. The Card is then permitted, although not required, to set DRQ, clear BSY. The Card asserts DMAREQ while
data is available to be transferred. The Card asserts DMAREQ while data is available to be transferred. The host
then reads the (512 * sector-count) bytes of data from the Card using DMA. While DMAREQ is asserted by the Card,
the Host asserts –DMACK while it is ready to transfer data by DMA and asserts –IORD once for each 16 bit word to
be transferred to the Host.
Interrupts are not generated on every sector, but upon completion of the transfer of the entire number of sectors
to be transferred or upon the occurrence of an unrecoverable error.
At command completion, the Command Block Registers contain the cylinder, head and sector number of the last
sector read. If an error occurs, the read terminates at the sector where the error occurred. The Command Block
Registers contain the cylinder, head, and sector number of the sector where the error occurred. The amount of
data transferred is indeterminate.
When a Read DMA command is received by the Card and 8 bit transfer mode has been enabled by the Set Features
command, the Card shall return the Aborted error.
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Table 70: Read DMA
Task File Register
7
6
5
4
3
2
1
0
COMMAND
C8h
DRIVE/HEAD
LBA
D
Head (LBA 27:24)
CYLINDER HI
Cylinder High (LBA23:16)
CYLINDER LOW
Cylinder Low (LBA15:8)
SECTOR NUM
Sector Number (LBA7:0)
SECTOR COUNT
Sector Count
FEATURES
nu
10.15 Read DMA Ext (25h) 48bit LBA
This command uses DMA mode to read from 1 to 65536 sectors as specified in the Sector Count Register. A sector
count of 0 requests 65536 sectors. The transfer begins at the sector specified in the Sector Number Register. When
this command is issued the CompactFlashTM Storage Card sets BSY, puts all or part of the sector of data in the
buffer. The Card is then permitted, although not required, to set DRQ, clear BSY. The Card asserts DMARQ while
data is available to be transferred. The Card asserts DMARQ while data is available to be transferred. The host then
reads the (512 * sector-count) bytes of data from the Card using DMA. While DMARQ is asserted by the Card, the
Host asserts -DMACK while it is ready to transfer data by DMA and asserts -IORD once for each 16 bit word to be
transferred to the Host.
Interrupts are not generated on every sector, but upon completion of the transfer of the entire number of sectors
to be transferred or upon the occurrence of an unrecoverable error.
At command completion, the Command Block Registers contain the LBA of the last sector read. If an error occurs,
the read terminates at the sector where the error occurred. The Command Block Registers contain the LBA of the
sector where the error occurred. The amount of data transferred is indeterminate.
When a Read DMA Ext command is received by the Card and 8 bit transfer mode has been enabled by the Set
Features command, the Card shall return the Aborted error.
Table 71: Read DMA Ext
register write
previous
current
Task File Register
15:8
7
6
5
4
3
2
1
0
COMMAND
-
25h
DRIVE/HEAD
-
1
1
1
Drive
Reserved
LBA High
LBA (47:40)
LBA (23:16)
LBA Mid
LBA (39:32)
LBA (15:8)
LBA Low
LBA (31:24)
LBA (7:0)
SECTOR COUNT
15:8
7:0
FEATURES
nu
nu
10.16 Read Multiple (C4h)
The Read Multiple command performs similarly to the Read Sectors command. Interrupts are not generated on
every sector, but on the transfer of a block which contains the number of sectors defined by a Set Multiple
command.
Command execution is identical to the Read Sectors operation except that the number of sectors defined by a Set
Multiple command is transferred without intervening interrupts. DRQ qualification of the transfer is required only
at the start of the data block, not on each sector.
The block count of sectors to be transferred without intervening interrupts is programmed by the Set Multiple
Mode command, which must be executed prior to the Read Multiple command. When the Read Multiple
command is issued, the Sector Count Register contains the number of sectors (not the number of blocks or the
block count) requested. If the number of requested sectors is not evenly divisible by the block count, as many full
blocks as possible are transferred, followed by a final, partial block transfer. The partial block transfer is for n
sectors, where:
n = (sector count) module (block count).
If the Read Multiple command is attempted before the Set Multiple Mode command has been executed or when
Read Multiple commands are disabled, the Read Multiple operation is rejected with an Aborted Command error.
Disk errors encountered during Read Multiple commands are posted at the beginning of the block or partial block
transfer, but DRQ is still set and the data transfer will take place as it normally would, including transfer of
corrupted data, if any.
Interrupts are generated when DRQ is set at the beginning of each block or partial block. The error reporting is the
same as that on a Read Sector(s) Command. This command reads from 1 to 256 sectors as specified in the Sector
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Count register. A sector count of 0 requests 256 sectors. The transfer begins at the sector specified in the Sector
Number Register.
If an error occurs, the read terminates at the sector where the error occurred. The Command Block Registers
contain the cylinder, head and sector number of the sector where the error occurred. The flawed data are
pending in the sector buffer.
Subsequent blocks or partial blocks are transferred only if the error was a correctable data error. All other errors
cause the command to stop after transfer of the block which contained the error.
Table 72
defines the Read Multiple command Byte sequence.
Table 72: Read Multiple
Task File Register
7
6
5
4
3
2
1
0
COMMAND
C4h
DRIVE/HEAD
1
LBA
1
D
Head (LBA 27:24)
CYLINDER HI
Cylinder High (LBA23:16)
CYLINDER LOW
Cylinder Low (LBA15:8)
SECTOR NUM
Sector Number (LBA7:0)
SECTOR COUNT
Sector Count
FEATURES
nu
10.17 Read Multiple Ext (29h) 48bit LBA
The Read Multiple Ext command performs similarly to the Read Sectors Ext command. Interrupts are not generated
on every sector, but on the transfer of a block, which contains the number of sectors defined by a Set Multiple
command.
Command execution is identical to the Read Sectors Ext operation except that the number of sectors defined by a
Set Multiple command is transferred without intervening interrupts. DRQ qualification of the transfer is required
only at the start of the data block, not on each sector.
The block count of sectors to be transferred without intervening interrupts is programmed by the Set Multiple
Mode command, which shall be executed prior to the Read Multiple command. When the Read Multiple
command is issued, the Sector Count Register contains the number of sectors (not the number of blocks or the
block count) requested. If the number of requested sectors is not evenly divisible by the block count, as many full
blocks as possible are transferred, followed by a final, partial block transfer. The partial block transfer is for n
sectors, where n = (sector count) modulo (block count).
If the Read Multiple Ext command is attempted before the Set Multiple Mode command has been executed, or
when Read Multiple Ext command is disabled, the Read Multiple Ext operation is rejected with an Aborted
Command error. Disk errors encountered during a Read Multiple Ext command are posted at the beginning of the
block or partial block transfer, but DRQ is still set and the data transfer shall take place as it normally would,
including transfer of corrupted data, if any.
Interrupts are generated when DRQ is set at the beginning of each block or partial block. The error reporting is the
same as that on a Read Sector(s) Command. This command reads from 1 to 65536 sectors as specified in the Sector
Count Register. A sector count of 0 requests 65536 sectors. The transfer begins at the sector specified in the Sector
Number Register.
At command completion, the Command Block Registers contain the LBA of the last sector read.
If an error occurs, the read terminates at the sector where the error occurred. The Command Block Registers
contain the LBA of the sector where the error occurred. The flawed data is pending in the sector buffer.
Subsequent blocks or partial blocks are transferred only if the error was a correctable data error. All other errors
cause the command to stop after transfer of the block that contained the error.
Table 73: Read Multiple Ext
register write
previous
current
Task File Register
15:8
7
6
5
4
3
2
1
0
COMMAND
-
29h
DRIVE/HEAD
-
1
1
1
Drive
Reserved
LBA High
LBA (47:40)
LBA (23:16)
LBA Mid
LBA (39:32)
LBA (15:8)
LBA Low
LBA (31:24)
LBA (7:0)
SECTOR COUNT
15:8
7:0
FEATURES
nu
nu
Note: This specification requires that CompactFlashTM Cards support a multiple block count of 1 and permits larger
values to be supported.
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10.18 Read Sector(s) (20h or 21h)
This command reads from 1 to 256 sectors as specified in the Sector Count register. A sector count of 0 requests 256
sectors. The transfer begins at the sector specified in the Sector Number Register. When this command is issued
and after each sector of data (except the last one) has been read by the host, the Card sets BSY, puts the sector of
data in the buffer, sets DRQ, clears BSY, and generates an interrupt. The host then reads the 512 Bytes of data
from the buffer.
If an error occurs, the read terminates at the sector where the error occurred. The Command Block Registers
contain the cylinder, head, and sector number of the sector where the error occurred. The flawed data are
pending in the sector buffer. Table 74
defines the Read Sector command Byte sequence.
Table 74: Read sector(s)
Task File Register
7
6
5
4
3
2
1
0
COMMAND
20h (or 21h Legacy)
DRIVE/HEAD
1
LBA
1
D
Head (LBA 27:24)
CYLINDER HI
Cylinder High (LBA23:16)
CYLINDER LOW
Cylinder Low (LBA15:8)
SECTOR NUM
Sector Number (LBA7:0)
SECTOR COUNT
Sector Count
FEATURES
nu
10.19 Read Sectors Ext (24h) 48bit LBA
This command reads from 1 to 65536 sectors as specified in the Sector Count Register. A sector count of 0 requests
65536 sectors. The transfer begins at the specified LBA. When this command is issued and after each sector of
data (except the last one) has been read by the host, the CompactFlashTM Storage Card sets BSY, puts the sector of
data in the buffer, sets DRQ, clears BSY, and generates an interrupt. The host then reads the 512 bytes of data
from the buffer.
At command completion, the Command Block Registers contain the LBA of the last sector read. If an error occurs,
the read terminates at the sector where the error occurred. The Command Block Registers contain the LBA of the
sector where the error occurred. The flawed data is pending in the sector buffer.
Table 75: Read Multiple Ext
register write
previous
current
Task File Register
15:8
7
6
5
4
3
2
1
0
COMMAND
-
24h
DRIVE/HEAD
-
1
1
1
Drive
Reserved
LBA High
LBA (47:40)
LBA (23:16)
LBA Mid
LBA (39:32)
LBA (15:8)
LBA Low
LBA (31:24)
LBA (7:0)
SECTOR COUNT
15:8
7:0
FEATURES
nu
nu
10.20 Read Verify Sector(s) (40h)
This command is identical to the Read Sectors command, except that DRQ is never set and no data is transferred
to the host. When the command is accepted, the Card sets BSY. When the requested sectors have been verified,
the Card clears BSY and generates an interrupt.
If an error occurs, the verify terminates at the sector where the error occurs. The Command Block Registers contain
the cylinder, head and sector number of the sector where the error occurred. The Sector Count Register contains
the number of sectors not yet verified.
Table 76
defines the Read Verify Sector command Byte sequence.
Table 76: Read Verify Sector(s)
Task File Register
7
6
5
4
3
2
1
0
COMMAND
40h
DRIVE/HEAD
1
LBA
1
D
Head (LBA 27:24)
CYLINDER HI
Cylinder High (LBA23:16)
CYLINDER LOW
Cylinder Low (LBA15:8)
SECTOR NUM
Sector Number (LBA7:0)
SECTOR COUNT
Sector Count
FEATURES
nu
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10.21 Read Verify Ext (42h) 48bit LBA
This command is identical to the Read Sector(s) Ext command, except that DRQ is never set and no data is
transferred to the host. When the command is accepted, the CompactFlashTM Storage Card sets BSY.
When the requested sectors have been verified, the CompactFlashTM Storage Card clears BSY and generates an
interrupt. Upon command completion, the Command Block Registers contain the LBA of the last sector verified.
If an error occurs, the Read Verify Command terminates at the sector where the error occurs. The Command Block
Registers contain the LBA of the sector where the error occurred. The Sector Count Register contains the number of
sectors not yet verified.
Table 77: Read Multiple Ext
register write
previous
current
Task File Register
15:8
7
6
5
4
3
2
1
0
COMMAND
-
42h
DRIVE/HEAD
-
1
1
1
Drive
Reserved
LBA High
LBA (47:40)
LBA (23:16)
LBA Mid
LBA (39:32)
LBA (15:8)
LBA Low
LBA (31:24)
LBA (7:0)
SECTOR COUNT
15:8
7:0
FEATURES
nu
nu
10.22 Recalibrate (1Xh)
This command is effectively a NOP command to the Card and is provided for compatibility purposes. Table 78
defines the Recalibrate command Byte sequence.
Table 78: Recalibrate
Task File Register
7
6
5
4
3
2
1
0
COMMAND
1Xh
DRIVE/HEAD
1
LBA
1
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
10.23 Request Sense (03h)
This command requests extended error information for the previous command. Table 79
defines the Request
Sense command Byte sequence. Table 80
defines the valid extended error codes. The extended error code is
returned to the host in the Error Register.
Table 79: Request sense
Task File Register
7
6
5
4
3
2
1
0
COMMAND
03h
DRIVE/HEAD
1
LBA
1
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
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Table 80: Extended Error Codes
Extended Error Code
Description
00h
No Error Detected
01h
Self Test OK (No Error)
09h
Miscellaneous Error
21h
Invalid Address (Requested Head or Sector Invalid)
2Fh
Address Overflow (Address Too Large)
35h, 36h
Supply or generated Voltage Out of Tolerance
11h
Uncorrectable ECC Error
18h
Corrected ECC Error
05h, 30-34h, 37h, 3Eh
Self Test or Diagnostic Failed
10h, 14h
ID Not Found
3Ah
Spare Sectors Exhausted
1Fh
Data Transfer Error / Aborted Command
0Ch, 38h, 3Bh, 3Ch, 3Fh
Corrupted Media Format
03h
Write / Erase Failed
10.24 Seek (7Xh)
This command is effectively a NOP command to the Card although it does perform a range check of cylinder and
head or LBA address and returns an error if the address is out of range. Table 81
shows the Seek command Byte
sequence.
Table 81: Seek
Task File Register
7
6
5
4
3
2
1
0
COMMAND
7Xh
DRIVE/HEAD
1
LBA
1
D
Head (LBA 27:24)
CYLINDER HI
Cylinder High (LBA23:16)
CYLINDER LOW
Cylinder Low (LBA15:8)
SECTOR NUM
nu (LBA7:0)
SECTOR COUNT
nu
FEATURES
nu
10.25 Security Disable Password (F6h)
This command requests a transfer of a single sector of data from the host. Table 82 defines the content of this
sector of information. If the password selected by word 0 matches the password previously saved by the device,
the device disables the lock mode. This command does not change the Master password that may be reactivated
later by setting a User password.
Table 82: Security Disable Password
Task File Register
7
6
5
4
3
2
1
0
COMMAND
F6h
DRIVE/HEAD
1
LBA
1
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
Table 83: Security Password Data Content
Word
Content
0
Control word
Bit 0: identifier
0=compare User password
1=compare Master password
Bit 1-15: Reserved
1-16
Password (32 bytes)
17-255
Reserved
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10.26 Security Erase Prepare (F3h)
This command shall be issued immediately before the Security Erase Unit command to enable device erasing and
unlocking. This command prevents accidental erase of the CF card.
Table 84: Security Erase Prepare
Task File Register
7
6
5
4
3
2
1
0
COMMAND
F3h
DRIVE/HEAD
1
LBA
1
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
10.27 Security Erase Unit (F4h)
This command requests transfer of a single sector of data from the host. Table 83 defines the content of this
sector of information. If the password does not match the password previously saved by the CF card, the CF card
rejects the command with command aborted. The Security Erase Prepare command shall be completed
immediately prior to the Security Erase Unit command. If the CF Card receives a Security Erase Unit command
without an immediately prior Security Erase Prepare command, the CF card aborts the Security Erase Unit
command.
Table 85: Security Erase Unit
Task File Register
7
6
5
4
3
2
1
0
COMMAND
F4h
DRIVE/HEAD
1
LBA
1
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
10.28 Security Freeze Lock (F5h)
The Security Freeze Lock command sets the CF card to Frozen mode. After command completion, any other
commands that update the CF card Lock mode are rejected. Frozen mode is disabled by power off or hardware
reset. If Security Freeze Lock is issued when the CF card is in Frozen mode, the command executes and the CF card
remains in Frozen mode. After command completion, the Sector Count Register shall be set to 0.
Commands disabled by Security Freeze Lock are:
� Security Set Password
� Security Unlock
� Security Disable Password
� Security Erase Unit
If security mode feature set is not supported, this command shall be handled as Wear Level command.
Table 86: Security Freeze Lock
Task File Register
7
6
5
4
3
2
1
0
COMMAND
F5h
DRIVE/HEAD
1
LBA
1
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
10.29 Security Set Password (F1h)
This command requests a transfer of a single sector of data from the host. Table 88 defines the content of the
sector of information. The data transferred controls the function of this command.
Table 89 defines the interaction of the identifier and security level bits.
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Table 87: Security Set Password
Task File Register
7
6
5
4
3
2
1
0
COMMAND
F1h
DRIVE/HEAD
1
LBA
1
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
Table 88: Security Set Password Data Content
Word
Content
0
Control word
Bit 0: identifier
0=set User password
1=set Master password
Bit 1-7: Reserved
Bit 8: Security level
0=High
1=Maximum
Bits 9-15: Reserved
1-16
Password (32 bytes)
17-255
Reserved
Table 89: Identifier and Security Level Bit Interaction
Identifier
Level
Command result
User
High
The password supplied with the command shall be saved as the new User password. The lock mode
shall be enabled from the next power-on or hardware reset. The CF card shall then be unlocked by
either the User password or the previously set Master password.
User
Maximum
The password supplied with the command shall be saved as the new User password. The lock mode
shall be enabled from the next power-on or hardware reset. The CF card shall then be unlocked by
only the User password.
The Master password previously set is still stored in the CF card shall not be used to unlock the CF
card.
Master
High or
Maximum
This combination shall set a Master password but shall not enable or disable the Lock mode. The
security level is not changed.
10.30 Security Unlock (F2h)
This command requests transfer of a single sector of data from the host. Table 83 defines the content of this
sector of information. If the identifier bit is set to Master and the device is in high security level, then the
password supplied shall be compared with the stored Master password. If the device is in the maximum security
level, then the unlock command shall be rejected. If the identifier bit is set to user, then the device compares the
supplied password with the stored User password. If the password compare fails then the device returns
command aborted to the host and decrements the unlock counter. This counter is initially set to five and is
decremented for each password mismatch when Security Unlock is issued and the device is locked. Once this
counter reaches zero, the Security Unlock and Security Erase Unit commands are command aborted until after a
power-on reset or a hardware reset is received. Security Unlock commands issued when the device is unlocked
have no effect on the unlock counter.
Table 90: Security Unlock
Task File Register
7
6
5
4
3
2
1
0
COMMAND
F2h
DRIVE/HEAD
1
LBA
1
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
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10.31 Set Features (EFh)
Table 91: Set Features
Task File Register
7
6
5
4
3
2
1
0
COMMAND
EFh
DRIVE/HEAD
nu
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
Config
FEATURES
Feature
Table 92: Features Supported
Feature
Operation
01h/81h
Enable/Disable 8-bit data transfers.
02h/82h
Enable/Disable write cache.
03h
Set transfer mode based on value in Sector Count register.
05h/85h
Enable/Disable advance power management.
09h/89h
Enable/Disable extended power operations.
0Ah/8Ah
Enable/Disable power level 1 commands.
55h/AAh
Disable/Enable Read Look Ahead.
66h/CCh
Disable/Enable Power On Reset (POR) established of defaults at Soft Reset.
69h
NOP Accepted for backward compatibility.
96h
NOP Accepted for backward compatibility.
97h
Accepted for backward compatibility. Use of this Feature is not recommended.
9Ah
Set the host current source capability.
Allows trade-off between current drawn and read/write speed.
BBh
4 bytes of data apply on Read/Write Long commands
Features 01h and 81h are used to enable and clear 8 bit data transfer modes in True IDE Mode. If the 01h feature
command is issued all data transfers shall occur on the low order D[7:0] data bus and the –IOIS16 signal shall not
be asserted for data register accesses. The host shall not enable this feature for DMA transfers.
Features 02h and 82h allow the host to enable or disable write cache in CompactFlashTM Storage Cards that
implement write cache. When the subcommand disable write cache is issued, the CompactFlashTM Storage Card
shall initiate the sequence to flush cache to non-volatile memory before command completion.
Feature 03h allows the host to select the PIO or Multiword DMA transfer mode by specifying a value in the Sector
Count register. The upper 5 bits define the type of transfer and the low order 3 bits encode the mode value. One
PIO mode shall be selected at all times. For Cards which support DMA, one DMA mode shall be selected at all
times. The host may change the selected modes by the Set Features command.
Table 93: Transfer Mode Values
Mode
Bits (7:3)
Bits (2:0)
PIO default mode
00000b
000b
PIO default mode, disable IORDY
00000b
001b
PIO flow control transfer mode
00001b
Mode(1)
Reserved
00010b
N/A
Multi-Word DMA mode
00100b
Mode(1)
Ultra DMA mode
01000b
Mode(1)
Reserved
1000b
N/A
(1)Mode = transfer mode number
Notes: Multiword DMA is not permitted for devices configured in the PC Card Memory or the PC Card I/O interface
mode.
If a CompactFlashTM Storage Card supports PIO modes greater than 0 and receives a Set Features command with a
Set Transfer Mode parameter and a Sector Count register value of “00000000b”, it shall set its default PIO mode.
If the value is “00000001b” and the CompactFlashTM Storage Card supports disabling of IORDY, then the
CompactFlashTM Storage Card shall set its default PIO mode and disable IORDY. A CompactFlashTM Storage Card shall
support all PIO modes below the highest mode supported, e.g., if PIO mode 1 is supported PIO mode 0 shall be
supported.
Support of IORDY is mandatory when PIO mode 3 or above is the current mode of operation.
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A CompactFlashTM Storage Card reporting support for Multiword DMA modes shall support all Multiword DMA modes
below the highest mode supported. For example, if Multiword DMA mode 2 support is reported, then modes 1 and
0 shall also be supported. Note that Multiword DMA shall not be supported while PC Card interface modes are
selected.
A CompactFlash Storage Card reporting support for Ultra DMA modes shall support all Ultra DMA modes below the
highest mode supported. For example, if Ultra DMA mode 2 support is reported then modes 1 and 0 shall also be
supported.
If an Ultra DMA mode is enabled, any previously enabled Multiword DMA mode shall be disabled by the device. If
a Multiword DMA mode is enabled any previously enabled Ultra DMA mode shall be disabled by the device.
Feature 05h allows the host to enable Advanced Power Management. To enable Advanced Power Management,
the host writes the Sector Count register with the desired advanced power management level and then executes a
Set Features command with subcommand code 05h. The power management level is a scale from the lowest
power consumption setting of 01h to the maximum performance level of FEh.
Table 94: Advanced power management levels shows these values.
Table 94: Advanced power management levels
Level
Sector Count Value
Maximum performance
FEh
Intermediate power management levels without Standby
81h-FDh
Minimum power consumption without Standby
80h
Intermediate power management levels with Standby
02h-7Fh
Minimum power consumption with Standby
01h
Reserved
FFh
Reserved
00h
In the current version the advanced power management levels are accepted, but don’t influence performance
and power consumption.
Device performance may increase with increasing power management levels. Device power consumption may
increase with increasing power management levels. The power management levels may contain discrete bands.
For example, a device may implement one power management method from 80h to A0h and a higher
performance, higher power consumption method from level A1h to FEh. Advanced power management levels 80h
and higher do not permit the device to spin down to save power.
Feature 85h disables Advanced Power Management. Subcommand 85h may not be implemented on all devices
that implement Set Features subcommand 05h.
Features 0Ah and 8Ah are used to enable and disable Power Level 1 commands. Feature 0Ah is the default feature
for the CF+ CompactFlashTM Storage Card with extended power as they require Power Level 1 to perform their full
set of functions.
Power Enhanced CF Storage Cards are required to power up and execute all supported commands and protocols in
Power Level 0, their default feature shall be 8Ah: Disable Power Level 1 Commands. No commands are actually
excluded for such cards in Power Level 0 because no commands require Power Level 1. The 8Ah default allows the
cards to restrict their operating power to Power Level 0 limits for compatibility with hosts that do not recognize or
support the extended power capabilities of Power Enhanced CF Storage Cards. It also allows hosts that support
extended power to take advantage of it by setting the feature to 0Ah: Enable Power Level 1 Commands.
Features 55h and BBh are the default features for the CompactFlashTM Storage Card; thus, the host does not have
to issue this command with these features unless it is necessary for compatibility reasons.
Feature code 9Ah enables the host to configure the card to best meet the host system’s power requirements. The
host sets a value in the Sector Count register that is equal to one-fourth of the desired maximum average current
(in mA) that the card should consume. For example, if the Sector Count register were set to 6, the card would be
configured to provide the best possible performance without exceeding 24 mA. Upon completion of the
command, the card responds to the host with the range of values supported by the card. The minimum value is
set in the Cylinder Low register, and the maximum value is set in the Cylinder Hi register. The default value, after
a power on reset, is to operate at the highest performance and therefore the highest current mode. The card shall
accept values outside this programmable range, but shall operate at either the lowest power or highest
performance as appropriate.
Features 66h and CCh can be used to enable and disable whether the Power On Reset (POR) Defaults shall be set
when a soft reset occurs. The default setting is to revert to the POR defaults when a soft reset occurs.
10.32 Set Multiple Mode (C6h)
This command enables the Card to perform Read and Write Multiple operations and establishes the block count
for these commands. The Sector Count Register is loaded with the number of sectors per block. Upon receipt of the
command, the Card sets BSY and checks the Sector Count Register.
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If the Sector Count Register contains a valid value and the block count is supported, the value is loaded for all
subsequent Read Multiple and Write Multiple commands and execution is enabled. If a block count is not
supported, an Aborted Command error is posted, and Read Multiple and Write Multiple commands are disabled. If
the Sector Count Register contains ‘0’ when the command is issued, Read and Write Multiple commands are
disabled. At power on the default mode is Read and Write Multiple disabled, unless it is disabled by a Set Feature
command. Table 95
defines the Set Multiple Mode command Byte sequence.
Table 95: Set Multiple Mode
Task File Register
7
6
5
4
3
2
1
0
COMMAND
C6h
DRIVE/HEAD
nu
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
Sector Count
FEATURES
nu
10.33 Set Sleep Mode (99h or E6)
This command causes the CompactFlashTM Memory Card to set BSY, enter the Sleep mode, clear BSY and generate
an interrupt. Recovery from sleep mode is accomplished by simply issuing another command. Sleep mode is also
entered when internal timers expire so the host does not need to issue this command except when it wishes to
enter Sleep mode immediately. The default value for the timer is 20 milliseconds. Note that this time base (5ms)
is different from the ATA Specification. Table 96
defines the Set Sleep Mode command Byte sequence.
Table 96: Set Sleep Mode
Task File Register
7
6
5
4
3
2
1
0
COMMAND
99h or E6h
DRIVE/HEAD
nu
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
10.34 S.M.A.R.T. (B0h)
The intent of self-monitoring, analysis, and reporting technology (the SMART feature set) is to protect user data
and minimize the likelihood of unscheduled system downtime that may be caused by predictable degradation
and/or fault of the device. By monitoring and storing critical performance and calibration parameters, SMART
feature set devices attempt to predict the likelihood of near-term degradation or fault condition. Providing the
host system the knowledge of a negative reliability condition allows the host system to warn the user of the
impending risk of a data loss and advise the user of appropriate action. Support of this feature set is indicated in
the IDENTIFY DEVICE data (Word 82 bit 0).
Table 97: S.M.A.R.T. Features
Task File Register
7
6
5
4
3
2
1
0
COMMAND
B0h
DRIVE/HEAD
1
1
1
D
nu
CYLINDER HI
C2h
CYLINDER LOW
4Fh
SECTOR NUM
nu
SECTOR COUNT
XXh
FEATURES
Feature
Details of S.M.A.R.T. features are described in Section 11.
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10.35 Standby (96h or E2)
This command causes the Card to set BSY, enter the Sleep mode (which corresponds to the ATA ‘Standby’ Mode),
clear BSY and return the interrupt immediately. Recovery from Sleep mode is accomplished by issuing another
command. Table 98
defines the Standby command Byte sequence.
Table 98: Standby
Task File Register
7
6
5
4
3
2
1
0
COMMAND
96h or E2h
DRIVE/HEAD
nu
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
10.36 Standby Immediate (94h or E0h)
This command causes the Card to set BSY, enter the Sleep mode (which corresponds to the ATA Standby Mode),
clear BSY and return the interrupt immediately.
Recovery from Sleep mode is accomplished by issuing another command. Table 99
defines the Standby Immediate
Byte sequence.
Table 99: Standby Immediate
Task File Register
7
6
5
4
3
2
1
0
COMMAND
94h or E0h
DRIVE/HEAD
nu
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
10.37 Translate Sector (87h)
This command is effectively a NOP command and only implemented for backward compatibility. The Sector Count
Register will always be returned with a ‘00h’ indicating Translate Sector is not needed.
Table 100 defines the Translate Sector command Byte sequence.
Table 100: Translate Sector
Task File Register
7
6
5
4
3
2
1
0
COMMAND
87h
DRIVE/HEAD
1
LBA
1
D
Head (LBA 27:24)
CYLINDER HI
Cylinder High (LBA23:16)
CYLINDER LOW
Cylinder Low (LBA15:8)
SECTOR NUM
nu (LBA7:0)
SECTOR COUNT
nu
FEATURES
nu
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10.38 Write Buffer (E8h)
The Write Buffer command enables the host to overwrite contents of the Card’s sector buffer with any data
pattern desired. This command has the same protocol as the Write Sector(s) command and transfers 512 Bytes.
Table 101
defines the Write Buffer command Byte sequence.
Table 101: Write Buffer
Task File Register
7
6
5
4
3
2
1
0
COMMAND
E8h
DRIVE/HEAD
nu
D
nu
CYLINDER HI
nu
CYLINDER LOW
nu
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
nu
10.39 Write DMA (CAh)
This command uses DMA mode to write from 1 to 256 sectors as specified in the Sector Count register. A sector
count of 0 requests 256 sectors. The transfer begins at the sector specified in the Sector Number Register. When
this command is issued the CompactFlashTM Storage Card sets BSY, puts all or part of the sector of data in the
buffer. The Card is then permitted, although not required, to set DRQ, clear BSY. The Card asserts DMAREQ while
data is available to be transferred. The host then writes the (512 * sector-count) bytes of data to the Card using
DMA. While DMAREQ is asserted by the Card, the Host asserts –DMACK while it is ready to transfer data by DMA and
asserts –IOWR once for each 16 bit word to be transferred from the Host.
Interrupts are not generated on every sector, but upon completion of the transfer of the entire number of sectors
to be transferred or upon the occurrence of an unrecoverable error. At command completion, the Command Block
Registers contain the cylinder, head and sector number of the last sector written. If an error occurs, the write
terminates at the sector where the error occurred. The Command Block Registers contain the cylinder, head, and
sector number of the sector where the error occurred. The amount of data transferred is indeterminate.
When a Write DMA command is received by the Card and 8 bit transfer mode has been enabled by the Set
Features command, the Card shall return the Aborted error.
Table 102: Write DMA
Task File Register
7
6
5
4
3
2
1
0
COMMAND
CAh
DRIVE/HEAD
LBA
D
Head (LBA 27:24)
CYLINDER HI
Cylinder High (LBA23:16)
CYLINDER LOW
Cylinder Low (LBA15:8)
SECTOR NUM
Sector number (LBA7:0)
SECTOR COUNT
Sector Count
FEATURES
nu
10.40 Write DMA Ext (35h) 48bit LBA
This command uses DMA mode to write from 1 to 65536 sectors as specified in the Sector Count Register. A sector
count of 0 requests 65536 sectors. The transfer begins at the sector specified in the Sector Number Register. When
this command is issued the CompactFlashTM Storage Card sets BSY, puts all or part of the sector of data in the
buffer. The Card is then permitted, although not required, to set DRQ, clear BSY. The Card asserts DMARQ while
data is available to be transferred. The host then writes the (512 * sector-count) bytes of data to the Card using
the DMA protocol. While DMARQ is asserted by the Card, the Host asserts -DMACK while it is ready to transfer data
by DMA and asserts -IOWR once for each 16 bit word to be transferred from the Host.
Interrupts are not generated on every sector, but upon completion of the transfer of the entire number of sectors
to be transferred or upon the occurrence of an unrecoverable error.
At command completion, the Command Block Registers contain the LBA of the last sector written. If an error
occurs, the write terminates at the sector where the error occurred. The Command Block Registers contain the LBA
of the sector where the error occurred. The amount of data transferred is indeterminate.
When a Write DMA command is received by the Card and 8 bit transfer mode has been enabled by the Set
Features command, the Card shall return the Aborted error.
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Table 103: Write DMA Ext
register write
previous
current
Task File Register
15:8
7
6
5
4
3
2
1
0
COMMAND
-
35h
DRIVE/HEAD
-
1
1
1
Drive
Reserved
LBA High
LBA (47:40)
LBA (23:16)
LBA Mid
LBA (39:32)
LBA (15:8)
LBA Low
LBA (31:24)
LBA (7:0)
SECTOR COUNT
15:8
7:0
FEATURES
nu
nu
10.41 Write Multiple Command (C5h)
This command is similar to the Write Sectors command. The Card sets BSY within 400ns of accepting the
command. Interrupts are not presented on each sector but on the transfer of a block which contains the number
of sectors defined by Set Multiple. Command execution is identical to the Write Sectors operation except that the
number of sectors defined by the Set Multiple command is transferred without intervening interrupts.
DRQ qualification of the transfer is required only at the start of the data block, not on each sector. The block
count of sectors to be transferred without intervening interrupts is programmed by the Set Multiple Mode
command, which must be executed prior to the Write Multiple command.
When the Write Multiple command is issued, the Sector Count Register contains the number of sectors (not the
number of blocks or the block count) requested. If the number of requested sectors is not evenly divisible by the
sector/block, as many full blocks as possible are transferred, followed by a final, partial block transfer. The partial
block transfer is for n sectors, where:
n = (sector count) module (block count).
If the Write Multiple command is attempted before the Set Multiple Mode command has been executed or when
Write Multiple commands are disabled, the Write Multiple operation will be rejected with an aborted command
error.
Errors encountered during Write Multiple commands are posted after the attempted writes of the block or partial
block transferred. The Write command ends with the sector in error, even if it is in the middle of a block.
Subsequent blocks are not transferred in the event of an error. Interrupts are generated when DRQ is set at the
beginning of each block or partial block.
The Command Block Registers contain the cylinder, head and sector number of the sector where the error
occurred and the Sector Count Register contains the residual number of sectors that need to be transferred for
successful completion of the command. For example, each block has 4 sectors, a request for 8 sectors is issued
and an error occurs on the third sector. The Sector Count Register contains 6 and the address is that of the third
sector.
Note: The current revision of the CompactFlashTM Memory Card only supports a block count of 1 as indicated in the
Identify Drive Command information. The Write Multiple command is provided for compatibility with future
products which may support a larger block count.
Table 104
defines the Write Multiple command Byte sequence.
Table 104: Write Multiple
Task File Register
7
6
5
4
3
2
1
0
COMMAND
C5h
DRIVE/HEAD
1
LBA
1
D
Head (LBA 27:24)
CYLINDER HI
Cylinder High (LBA23:16)
CYLINDER LOW
Cylinder Low (LBA15:8)
SECTOR NUM
Sector number (LBA7:0)
SECTOR COUNT
Sector Count
FEATURES
nu
10.42 Write Multiple Ext (39h) 48bit LBA
The Write Multiple Ext command is similar to the Write Multiple command, except that LBA addressing is
mandatory, the LBA associated with this command is a 48 bit address, and the sector count field is a 16 bit field.
The second (lower in the table) part of each 16 bit field can be written to or read from by setting the HOB bit of
the Device Control Register to 1 before reading or writing the field. Reading or writing the task file shall reset the
HOA bit to 0.
Error handling is similar to the Write Multiple command, except that the error sector address is always returned as
a 48 bit address, and the sector count is a 16 bit number.
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Table 105: Write Multiple Ext
register write
previous
current
Task File Register
15:8
7
6
5
4
3
2
1
0
COMMAND
-
39h
DRIVE/HEAD
-
1
1
1
Drive
Reserved
LBA High
LBA (47:40)
LBA (23:16)
LBA Mid
LBA (39:32)
LBA (15:8)
LBA Low
LBA (31:24)
LBA (7:0)
SECTOR COUNT
15:8
7:0
FEATURES
nu
nu
10.43 Write Multiple without Erase (CDh)
This command is similar to the Write Multiple command with the exception that an implied erase before write
operation is not performed. The sectors should be pre-erased with the Erase Sector(s) command before this
command is issued. Table 106
defines the Write Multiple without Erase command Byte sequence.
Table 106: Write Multiple without Erase
Task File Register
7
6
5
4
3
2
1
0
COMMAND
CDh
DRIVE/HEAD
1
LBA
1
D
Head (LBA 27:24)
CYLINDER HI
Cylinder High (LBA23:16)
CYLINDER LOW
Cylinder Low (LBA15:8)
SECTOR NUM
Sector number (LBA7:0)
SECTOR COUNT
Sector Count
FEATURES
nu
10.44 Write Sector(s) (30h or 31h)
This command writes from 1 to 256 sectors as specified in the Sector Count Register. A sector count of zero requests
256 sectors. The transfer begins at the sector specified in the Sector Number Register. When this command is
accepted, the Card sets BSY, sets DRQ and clears BSY, then waits for the host to fill the sector buffer with the data
to be written. No interrupt is generated to start the first host transfer operation. No data should be transferred by
the host until BSY has been cleared by the host.
For multiple sectors, after the first sector of data is in the buffer, BSY will be set and DRQ will be cleared. After the
next buffer is ready for data, BSY is cleared, DRQ is set and an interrupt is generated. When the final sector of
data is transferred, BSY is set and DRQ is cleared. It will remain in this state until the command is completed at
which time BSY is cleared and an interrupt is generated. If an error occurs during a write of more than one sector,
writing terminates at the sector where the error occurred. The Command Block Registers contain the cylinder,
head and sector number of the sector where the error occurred. The host may then read the command block to
determine what error has occurred, and on which sector. Table 107
defines the Write Sector(s) command Byte
sequence.
Table 107: Write Sector(s)
Task File Register
7
6
5
4
3
2
1
0
COMMAND
30h or 31h
DRIVE/HEAD
1
LBA
1
D
Head (LBA 27:24)
CYLINDER HI
Cylinder High (LBA23:16)
CYLINDER LOW
Cylinder Low (LBA15:8)
SECTOR NUM
Sector number (LBA7:0)
SECTOR COUNT
Sector Count
FEATURES
nu
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10.45 Write Sector(s) Ext (34h) 48bit LBA
This is the 48-bit address version of the Write Sector(s) command.
This command writes from 1 to 65,536 sectors as specified in the Sector Count Register. A sector count value of
0000h requests 65,536 sectors. The device shall interrupt for each DRQ block transferred.
If an error occurs during a write of more than one sector, writing terminates at the sector where the error occurs.
The Command Block Registers contain the 48-bit LBA of the sector where the error occurred. The host may then
read the command block to determine what error has occurred, and on which sector.
Table 108: Write Sector(s) Ext
register write
previous
current
Task File Register
15:8
7
6
5
4
3
2
1
0
COMMAND
-
34h
DRIVE/HEAD
-
1
1
1
Drive
Reserved
LBA High
LBA (47:40)
LBA (23:16)
LBA Mid
LBA (39:32)
LBA (15:8)
LBA Low
LBA (31:24)
LBA (7:0)
SECTOR COUNT
15:8
7:0
FEATURES
nu
nu
10.46 Write Sector(s) without Erase (38h)
This command is similar to the Write Sector(s) command with the exception that an implied erase before write
operation is not performed. This command has the same protocol as the Write Sector(s) command. The sectors
should be pre-erased with the Erase Sector(s) command before this command is issued. If the sector is not pre-
erased a normal write sector operation will occur. Table 109
defines the Write Sector(s) without Erase command
Byte sequence.
Table 109: Write Sector(s) without Erase
Task File Register
7
6
5
4
3
2
1
0
COMMAND
38h
DRIVE/HEAD
1
LBA
1
D
Head (LBA 27:24)
CYLINDER HI
Cylinder High (LBA23:16)
CYLINDER LOW
Cylinder Low (LBA15:8)
SECTOR NUM
Sector number (LBA7:0)
SECTOR COUNT
Sector Count
FEATURES
nu
10.47 Write Verify (3Ch)
This command is similar to the Write Sector(s) command, except each sector is verified immediately after being
written. This command has the same protocol as the Write Sector(s) command. Table 110
defines the Write Verify
command Byte sequence.
Table 110: Write Verify
Task File Register
7
6
5
4
3
2
1
0
COMMAND
3Ch
DRIVE/HEAD
1
LBA
1
D
Head (LBA 27:24)
CYLINDER HI
Cylinder High (LBA23:16)
CYLINDER LOW
Cylinder Low (LBA15:8)
SECTOR NUM
Sector number (LBA7:0)
SECTOR COUNT
Sector Count
FEATURES
nu
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11 S.M.A.R.T Functionality
The C-4x0 CF cards support the following SMART commands, determined by the Feature Register value.
Table 111: S.M.A.R.T. Features Supported
Feature
Operation
D0h
SMART Read Data
D1h
SMART Read Attribute Thresholds
D2h
SMART Enable/Disable Attribute
D8h
SMART Enable Operations
D9h
Autosave SMART Disable Operations
DAh
SMART Return Status
SMART commands with Feature Register values not mentioned in the above table are not supported, and will be
aborted.
11.1 S.M.A.R.T. Enable / Disable operations
This command enables / disables access to the SMART capabilities of the CF card.
The state of SMART (enabled or disabled) is preserved across power cycles.
Table 112: S.M.A.R.T. Enable / Disable operations (Feature D8h / D9h)
Task File Register
7
6
5
4
3
2
1
0
COMMAND
B0h
DRIVE/HEAD
1
1
1
D
nu
CYLINDER HI
C2h
CYLINDER LOW
4Fh
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
D8h / D9h
11.2 S.M.A.R.T. Enable / Disable Attribute Autosave
This command is effectively a no-operation as the data for the SMART functionality is always available and kept
current in the CF card.
Table 113: S.M.A.R.T. Enable / Disable Attribute Autosave (Feature D2h)
Task File Register
7
6
5
4
3
2
1
0
COMMAND
B0h
DRIVE/HEAD
1
1
1
D
nu
CYLINDER HI
C2h
CYLINDER LOW
4Fh
SECTOR NUM
nu
SECTOR COUNT
00h or F1h
FEATURES
D2h
11.3 S.M.A.R.T. Read data
This command returns one sector of SMART data.
Table 114: S.M.A.R.T. read data (Feature D0h)
Task File Register
7
6
5
4
3
2
1
0
COMMAND
B0h
DRIVE/HEAD
1
1
1
D
nu
CYLINDER HI
C2h
CYLINDER LOW
4Fh
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
D0h
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The data structure returned is:
Table 115: S.M.A.R.T. Data Structure
Offset
Value
Description
0..1
0010h
SMART structure version for firmware “1”
2..361
Attribute entries 1 to 30 (12 bytes each)
362
00h
Off-line data collection status (no off-line data collection)
363
00h
Self-test execution status byte (self-test completed)
364..365
0000h
Total time to complete off-line data collection
366
00h
-
367
00h
Off-line data collection capability (no off-line data collection)
368..369
0003h
SMART capabilities
370
00h
Error logging capability (no error logging)
371
00h
-
372
00h
Short self-test routine recommended polling time
373
00h
Extended self-test routine recommended polling time
374..385
00h
Reserved
386..387
0004h
SMART Swissbit Structure Version for SMART for firmware “1”
388..391
“Commit” counter
392..395
Wear Level Threshold
396
Global Bad Block Management active
397
Global Wear Leveling active
398..401
Average Flash Block Erase Count
402..405
Number of Flash Blocks involved into the Wear Leveling
406..510
00h
-
511
Data structure checksum
The byte order for the multi-byte values is little Endian (least significant byte first), unless specified otherwise.
There are 12 attributes that are defined in the CF card. These return their data in the attribute section of the SMART
data, using a 12 byte data field.
The field at offset 386 gives a version number for the contents of the SMART data structure.
The byte at offset 396 is 0 if the bad block management is still working chip local, and 1 if the global bad block
management has started. This happens when one of the flash chips runs out of spare blocks, in this case spare
blocks from different flash chips are used.
The byte at offset 397 is 0 if the wear leveling has not yet started its global operation and 1 if the global wear
leveling has started. This happens when the most used chip has reached the erase count threshold defined in the
Erase Count Attribute.
In the following sections the Attributes for different SMART structure versions (Byte 0…1) are specified that may
depend on the firmware.
11.3.1 SMART Attributes for SMART structure version 0010h
11.3.1.1 Spare Block Count Attribute
This attribute gives information about the amount of available spare blocks.
Table 116: Spare Block Count Attribute for SMART structure version 0010h
Offset
Value
Description
0
c4h
Attribute ID – Reallocation Count
1..2
0003h
Flags – Pre-fail type, value is updated during normal operation
3
Attribute value. The value returned here is the minimum percentage of remaining
spare blocks over all flash chips, i.e. min over all chips (100 × current spare blocks
/ initial spare blocks)
4
Attribute value (worst value)
5..7
sum of initial number of spare blocks for all flash chips
8..10
sum of the current number of spare blocks for all flash chips
11
00h
Reserved
This attribute is used for the SMART Return Status command. If the attribute value field is less than the spare
block threshold, the SMART Return Status command will indicate a threshold exceeded condition.
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11.3.1.2 Spare Block Count Worst Chip Attribute Threshold
This attribute gives information about the amount of available spare blocks on the flash chip that has the lowest
current number of spare blocks.
Table 117: Spare Block Count Attribute for SMART structure version 0010h
Offset
Value
Description
0
D5h
Attribute ID – Reallocation Count
1..2
0003h
Flags – Pre-fail type, value is updated during normal operation
3
64h
Attribute value. This value is fixed at 100.
4
64h
Attribute value (worst value)
5..7
Initial number of spare blocks of the flash chip with the lowest current number of
spare blocks
8..10
Current number of spare blocks of the flash chip with the lowest current number
of spare blocks
11
00h
Reserved
11.3.1.3 Erase Count Attribute
This attribute gives information about the amount of flash block erases that have been performed.
Table 118: Erase Count Attribute for SMART structure version 0010h
Offset
Value
Description
0
E5h
Attribute ID – Erase Count Usage (vendor specific)
1..2
0003h
Flags – Pre-fail type, value is updated during normal operation
3
Attribute value. The value returned here is an estimation of the remaining card
life, in percent, based on the number of flash block erases compared to the target
number of erase cycles per block.
4
Attribute value (worst value)
5..10
Estimated total number of block erases
11
00h
Reserved
This attribute is used for the SMART Return Status command. If the attribute value field is less than the erase
count threshold, the SMART Return Status command will indicate a threshold exceeded condition.
11.3.1.4 Total ECC Errors Attribute
This attribute gives information about the total number of ECC errors that have occurred on flash read commands.
This attribute is not used for the SMART Return Status command.
Table 119: Total ECC Errors Attribute for SMART structure version 0010h
Offset
Value
Description
0
CBh
Attribute ID – Number of ECC errors
1..2
0002h
Flags – Advisory type, value is updated during normal operation
3
64h
Attribute value. This value is fixed at 100.
4
64h
Attribute value (worst value)
5..8
Total number of ECC errors (correctable and uncorrectable)
9..10
-
11
00h
Reserved
11.3.1.5 Correctable ECC Errors Attribute
This attribute gives information about the total number of correctable ECC errors that have occurred on flash read
commands. This attribute is not used for the SMART Return Status command.
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Table 120: Correctable ECC Errors Attribute for SMART structure version 0010h
Offset
Value
Description
0
CCh
Attribute ID – Number of corrected ECC errors
1..2
0002h
Flags – Advisory type, value is updated during normal operation
3
64h
Attribute value. This value is fixed at 100.
4
64h
Attribute value (worst value)
5..8
Total number of correctable ECC errors
9..10
-
11
00h
Reserved
11.3.1.6 UDMA CRC Errors Attribute
This attribute gives information about the total number of UDMA CRC errors that have occurred on flash read
commands. This attribute is not used for the SMART Return Status command.
Table 121: UDMA CRC Errors Attribute for SMART structure version 0010h
Offset
Value
Description
0
C7h
Attribute ID – UDMA CRC error rate
1..2
0002h
Flags – Advisory type, value is updated during normal operation
3
64h
Attribute value. This value is fixed at 100.
4
64h
Attribute value (worst value)
5..8
Total number of UDMA CRC errors
9..10
-
11
00h
Reserved
11.3.1.7 Total Number of Reads Attribute
This attribute gives information about the total number of flash read commands. This can be useful for the
interpretation of the number of correctable or total ECC errors. This attribute is not used for the SMART Return
Status command.
Table 122: Total Number of Reads Attribute for SMART structure version 0010h
Offset
Value
Description
0
E8h
Attribute ID – Number of Reads (vendor specific)
1..2
0002h
Flags – Advisory type, value is updated during normal operation
3
64h
Attribute value. This value is fixed at 100.
4
64h
Attribute value (worst value)
5..10
Total number of flash read commands
11
00h
Reserved
11.3.1.8 Power On Count Attribute
Table 123: Power On Count Attribute for SMART structure version 0010h
Offset
Value
Description
0
0Ch
Attribute ID – Power On Count
1..2
0002h
Flags – Advisory type, value is updated during normal operation
3
64h
Attribute value. This value is fixed at 100.
4
64h
Attribute value (worst value)
5..8
Number of Power On cycles
9..10
-
11
00h
Reserved
11.3.1.9 Total LBAs Written Attribute
This attribute gives the total amount of data written to the disk, in units of 32MB (65536 sectors). This number can
be converted to Terabytes written (TBW) by dividing the raw attribute value by 231.
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Table 124: Total LBAs Written for SMART structure version 0010h
Offset
Value
Description
0
F1h
Attribute ID – Total LBAs Written (vendor specific)
1..2
0002h
Flags – Advisory type, value is updated during normal operation
3
64h
Attribute value. This value is fixed at 100.
4
64h
Attribute value (worst value)
5..10
Total number of LBAs written to the disk, divided by 65536
11
00h
Reserved
11.3.1.10 Total LBAs Read Attribute
This attribute gives the total amount of data read from the disk, in units of 32MB (65536 sectors). This number can
be converted to Terabytes written (TBW) by dividing the raw attribute value by 231.
Table 125: Total LBAs Written for SMART structure version 0010h
Offset
Value
Description
0
F2h
Attribute ID – Total LBAs Read (vendor specific)
1..2
0002h
Flags – Advisory type, value is updated during normal operation
3
64h
Attribute value. This value is fixed at 100.
4
64h
Attribute value (worst value)
5..10
Total number of LBAs read from the disk, divided by 65536
11
00h
Reserved
11.3.1.11 Anchor Block Status Attribute
This attribute is a placeholder for future use in the firmware, it has no useful data yet.
Table 126: Anchor Block Status for SMART structure version 0010h
Offset
Value
Description
0
D6h
Attribute ID – Anchor Block Status (vendor specific)
1..2
0002h
Flags – Advisory type, value is updated during normal operation
3
64h
Attribute value. This value is fixed at 100.
4
64h
Attribute value (worst value)
5..10
-
11
00h
Reserved
11.3.1.12 Trim Status Attribute
This attribute gives percent ratio for the disk space that is currently in the trimmed state, reported as the
attribute value. The range for the attribute value is 1 to 99, it does not reach 100 even for a fully trimmed card
since the firmware-management blocks are also counted that do not have a trim status.
Table 127: Trim Status for SMART structure version 0010h
Offset
Value
Description
0
D7h
Attribute ID – Trim Status (vendor specific)
1..2
0002h
Flags – Advisory type, value is updated during normal operation
3
64h
Attribute value
4
64h
Attribute value (worst value)
5..10
-
11
00h
Reserved
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11.4 S.M.A.R.T. Read Attribute Thresholds
This command returns one sector of SMART attribute thresholds.
Table 128: S.M.A.R.T. read data (Feature D1h)
Task File Register
7
6
5
4
3
2
1
0
COMMAND
B0h
DRIVE/HEAD
1
1
1
D
nu
CYLINDER HI
C2h
CYLINDER LOW
4Fh
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
D1h
The data structure returned is:
Table 129: S.M.A.R.T. Data Structure
Offset
Value
Description
0..1
0010h
SMART structure version for Firmware “1”
2..361
Attribute threshold entries 1 to 30 (12 bytes each)
362..379
00h
Reserved
380..510
00h
-
511
Data structure checksum
Table 130: Spare Block Count Attribute Threshold
Offset
Value
Description
0
C4h
Attribute ID – Reallocation Count
1
19h*
Spare Block Count Threshold (* typical 25%, could vary)
2..11
00h
Reserved
Table 131: Spare Block Count Worst Chip Attribute Threshold
Offset
Value
Description
0
D5h
Attribute ID – Reallocation Count
1
00h
No threshold
2..11
00h
Reserved
Table 132: Erase Count Attribute Threshold
Offset
Value
Description
0
E5h
Attribute ID – Erase Count Usage (vendor specific)
1
01h*
Erase Count Threshold (* typical 1%, could vary)
2..11
00h
Reserved
Table 133: Total ECC Errors Attribute Threshold
Offset
Value
Description
0
CBh
Attribute ID – Number of ECC errors
1
00h
No threshold for the Total ECC Errors Attribute
2..11
00h
Reserved
Table 134: Correctable ECC Errors Attribute Threshold
Offset
Value
Description
0
CCh
Attribute ID – Number of corrected ECC errors
1
00h
No threshold for the Correctable ECC Errors Attribute
2..11
00h
Reserved
Table 135: UDMA CRC Errors Attribute
Offset
Value
Description
0
C7h
Attribute ID – UDMA CRC error rate
1
00h
No threshold for the UDMA CRC Errors Attribute
2..11
00h
Reserved
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Table 136: Total Number of Reads Attribute
Offset
Value
Description
0
E8h
Attribute ID – Number of Reads (vendor specific)
1
00h
No threshold for the Total Number of Reads Attribute
2..11
00h
Reserved
Table 137: Power On Count Attribute
Offset
Value
Description
0
0Ch
Attribute ID – Power On Count
1
00h
No threshold for the Power On Count Attribute
2..11
00h
Reserved
Table 138: Total LBAs Written Attribute
Offset
Value
Description
0
F1h
Attribute ID – Total LBAs Written (vendor specific)
1
00h
No threshold for the Total LBAs Written Attribute
2..11
00h
Reserved
Table 139: Total LBAs Read Attribute
Offset
Value
Description
0
F2h
Attribute ID – Total LBAs Read (vendor specific)
1
00h
No threshold for the Total LBAs Read Attribute
2..11
00h
Reserved
Table 140: Anchor Block Status Attribute
Offset
Value
Description
0
D6h
Attribute ID – Anchor Block Status (vendor specific)
1
00h
No threshold for the Anchor Block Status Attribute
2..11
00h
Reserved
Table 141: Trim Status Attribute
Offset
Value
Description
0
D7h
Attribute ID – Trim Status (vendor specific)
1
00h
No threshold for the Trim Status Attribute
2..11
00h
Reserved
11.5 S.M.A.R.T. Return Status
This command checks the device reliability status. If a threshold exceeded condition exists for either the Spare
Block Count attribute or the Erase Count attribute, the device will set the Cylinder Low register to F4h and the
Cylinder High register to 2Ch. If no threshold exceeded condition exists, the device will set the Cylinder Low
register to 4Fh and the Cylinder High register to C2h.
Table 142: S.M.A.R.T. read data (Feature D1h)
Task File Register
7
6
5
4
3
2
1
0
COMMAND
B0h
DRIVE/HEAD
1
1
1
D
nu
CYLINDER HI
C2h
CYLINDER LOW
4Fh
SECTOR NUM
nu
SECTOR COUNT
nu
FEATURES
DAh
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12 CIS information (typical)
0000: Code 01, link 03
D9 01 FF
- Device Info Tuple
- Link is 3 bytes
- I/O Device, No WPS, speed=250ns if no wait
- (One) 2 Kilobytes of address space
- End of CISTPL_DEVICE
000A: Code 1C, link 04
02 D9 01 FF
- Other Conditions Info Tuple
- Link is 4 bytes
- Conditions: 3V operation is allowed, and WAIT is used
- I/O Device, No WPS, speed = 250 ns if no wait
- (One) 2 Kilobytes of address space
- End of CISTPL_DEVICE
0016: Code 18, link 02
DF 01
- JEDEC programming info Tuple
- Link is 2 bytes
- Device manufacturer ID
- Manufacturer specific info
001E: Code 20, link 04
00 00 00 00
- Manufacturer ID Tuple
- Link length is 4 bytes
- PC Card manufacturer code
- Manufacturer specific info
002A: Code 21, link 02
04 01
- Function ID Tuple
- Link length is 2 bytes
- Fixed disk drive
- R=0: no expansion ROM; P=1: configure at POST
0032: Code 22, link 02
01 01
- Function Extension Tuple
- Link length is 2 bytes
- Disk interface information
- PC card ATA interface
003A: Code 22, link 03
02 04 07
- Function Extension Tuple
- Link length is 3 bytes
- PC card ATA basic features
- D=0: single drive on card; U=0: no unique serial number; S=1: silicon device; V=0: no VPP required
- I=0: twin IOIS16# unspecified; E=0: index bit not emulated; N=0: I/O includes 0x3F7;
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P=7: sleep, standby, idle supported
0044: Code 1A, link 05
01 07 00 02 07
- Configuration Tuple
- Link length is 5 bytes
- RFS: reserved; RMS: 1 byte register mask; RAS: 2 bytes base address
- Last configuration entry is 07H
- Configuration registers are located at 0200h
- Configuration registers 0 to 2 are present
0052: Code 1B, link 0B
C0 C0 A1 27 55 4D 5D 75 08 00 20
- Configuration Tuple
- Link length is 11 bytes
- Memory mapped configuration, index=0; I=1: Interface byte follows; D=1: Default entry
- W=1: wait required; R=1: ready/busy active; P=0: WP not used; B=0: BVD1, BVD2 not used;
Type=0: Memory interface
- M=1: misc info present; MS=1: 2 byte memory length; IR=0: no interrupt is used;
IO=0: no I/O space is used; T=0: no timing info specified; Power=1: VCC info, no VPP
- DI: no power-down current; PI=1: peak current info; AI: no average current info;
SI: no static current info; HV=1: max voltage info; LV=1: min voltage info; NV=1: nominal voltage info
- Nominal voltage 5.0V
- Minimum voltage 4.5V
- Maximum voltage 5.5V
- Peak current 80 mA
- Length of memory space is 2 Kbyte
- X=0: no more misc fields; P=1: power-down supported; RO=0: read/write media;
A=0: audio not supported; T=0: no twins supported
006C: Code 1B, link 06
00 01 21 B5 1E 4D
- Configuration Tuple
- Link length is 6 bytes
- Memory mapped configuration, index=0
- Power=1: VCC info, no VPP
- PI=1: peak current info; NV=1: nominal voltage info
- X=1: extension byte present
- Nominal voltage 3.30V
- Peak current 45 mA
007C: Code 1B, link 0D
C1 41 99 27 55 4D 5D 75 64 F0 FF FF 20
- Configuration Tuple
- Link length is 11 bytes
- Memory mapped configuration, index=0; I=1: Interface byte follows; D=1: Default entry
- W=1: wait required; R=1: ready/busy active; P=0: WP not used; B=0: BVD1, BVD2 not used;
Type=0: Memory interface
- M=1: misc info present; MS=1: 2 byte memory length; IR=0: no interrupt is used;
IO=0: no I/O space is used; T=0: no timing info specified; Power=1: VCC info, no VPP
- DI: no power-down current; PI=1: peak current info; AI: no average current info;
SI: no static current info; HV=1: max voltage info; LV=1: min voltage info; NV=1: nominal voltage info
- Nominal voltage 5.0V
- Minimum voltage 4.5V
- Maximum voltage 5.5V
- Peak current 80 mA
- Length of memory space is 2 Kbyte
- X=0: no more misc fields; P=1: power-down supported; RO=0: read/write media;
A=0: audio not supported; T=0: no twins supported
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009A: Code 1B, link 06
01 01 21 B5 1E 4D
- Configuration Tuple
- Link length is 6 bytes
- I/O mapped, index=1
- Power=1: VCC info, no VPP
- PI=1: peak current info; NV=1: nominal voltage info
- X=1: extension byte present
- Nominal voltage 3.30V
- Peak current 45 mA
00AA: Code 1B, link 12
C2 41 99 27 55 4D 5D 75 EA 61 F0 01 07 F6 03 01 EE 20
- Configuration Tuple
- Link length is 18 bytes
- I/O mapped, index=2; I=1: Interface byte follows; D=1: Default entry
- W=0: wait not required; R=1: ready/busy active; P=0: WP not used; B=0: BVD1, BVD2 not used;
Type=1: I/O interface
- M=1: misc info present; MS=0: no memory space info; IR=1: interrupt is used; IO=1: I/O space is used;
T=0: no timing info specified; Power=1: VCC info, no VPP
- DI: no power-down current; PI=1: peak current info; AI: no average current info; SI: no static;
current info; HV=1: max voltage info; LV=1: min voltage info; NV=1: nominal voltage info
- Nominal voltage 5.0V
- Minimum voltage 4.5V
- Maximum voltage 5.5V
- Peak current 80 mA
- R=1: range follows; S=1: support 16 bit hosts; E=1: support 8 bit hosts; IO=10: 10 lines decoded
- LS=1: 1 byte length; AS=2: 2 byte address; NR=1: 2 address ranges
- Address range 1 0x1F0 to 0x1F7
- Address range 2 0x3F6 to 0x3F7
- S=1: interrupt sharing logic; P=1: pulse mode supported; L=1: level mode supported;
M=0: masks V..N not present; IRQN=14: use interrupt 14
- X=0: no more misc fields; P=1: power-down supported; RO=0: read/write media;
A=0: audio not supported; T=0: no twins supported
00D2: Code 1B, link 06
02 01 21 B5 1E 4D
- Configuration Tuple
- Link length is 6 bytes
- I/O mapped, index=2
- Power=1: VCC info, no VPP
- PI=1: peak current info; NV=1: nominal voltage info
- X=1: extension byte present
- Nominal voltage 3.30V
- Peak current 45 mA
00E2: Code 1B, link 12
C3 41 99 27 55 4D 5D 75 EA 61 70 01 07 76 03 01 EE 20
- Configuration Tuple
- Link length is 18 bytes
- I/O mapped, index=2; I=1: Interface byte follows; D=1: Default entry
- W=0: wait not required; R=1: ready/busy active; P=0: WP not used; B=0: BVD1, BVD2 not used;
Type=1: I/O interface
- M=1: misc info present; MS=0: no memory space info; IR=1: interrupt is used; IO=1: I/O space is used;
T=0: no timing info specified; Power=1: VCC info, no VPP
- DI: no power-down current; PI=1: peak current info; AI: no average current info; SI: no static;
current info; HV=1: max voltage info; LV=1: min voltage info; NV=1: nominal voltage info
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- Nominal voltage 5.0V
- Minimum voltage 4.5V
- Maximum voltage 5.5V
- Peak current 80 mA
- R=1: range follows; S=1: support 16 bit hosts; E=1: support 8 bit hosts; IO=10: 10 lines decoded
- LS=1: 1 byte length; AS=2: 2 byte address; NR=1: 2 address ranges
- Address range 1 0x170 to 0x177
- Address range 2 0x376 to 0x377
- S=1: interrupt sharing logic; P=1: pulse mode supported; L=1: level mode supported;
M=0: masks V..N not present; IRQN=14: use interrupt 14
- X=0: no more misc fields; P=1: power-down supported; RO=0: read/write media;
A=0: audio not supported; T=0: no twins supported
010A: Code 1B, link 06
03 01 21 B5 1E 4D
- Configuration Tuple
- Link length is 6 bytes
- I/O mapped, index=3
- Power=1: VCC info, no VPP
- PI=1: peak current info; NV=1: nominal voltage info
- X=1: extension byte present
- Nominal voltage 3.30V
- Peak current 45 mA
011A: Code 1B, link 04
07 00 28 D3
- Configuration Tuple
- Link length is 4 bytes
- I/O mapped, index=7
- No feature descriptions follow
- Swissbit specific data
- Swissbit specific data
0126: Code 14, link 00
- No link control Tuple
- Link length is 0 bytes
012A: Code 15, link 14*)
04 01 53 77 69 73 73 62 69 74 00 43 46 20 43 61 72 64 00 FF *)
- Level 1 version/product info
- Link length is 21 bytes
- PCMCIA2.0/JEIDA4.1
- PCMCIA2.0/JEIDA4.1
- Product name: “
Swissbit
” “
CF Card
” *) can vary in different configurations
-
The length of the strings will affect the following start addresses
0156: Code FF, link FF
- End of CISTPL_VERS_1
- End of CIS
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13 Package mechanical
Figure 21: Type I CompactFlashTM Memory Card Dimensions
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14 Declaration of Conformity
We
Manufacturer: Swissbit AG
Industriestrasse 4
CH-9552 Bronschhofen
Switzerland
declare under our sole responsibility that the product
Product Type: CompactFlash™ Card
Brand Name: SWISSMEMORY™ CompactFlash™
Product Series: C-440
Part Number: SFCFxxxxHxxxxxx-x-xx-xxx-xxx
to which this declaration relates is in conformity with the following directives:
EN55022:2006 +A1:r B
FCC47 Part 15 Subpart B §15.111
EN 61000-4-2:2009
EN 61000-4-3:2006+A1:2008+A2:2010
EN 61000-6-2:2005
2002/96/EC Category 3 (WEEE)
following the provisions of Directive
Electromagnetic compatibility 2004/108/EC
Restriction of the use of certain hazardous substances 2011/65/EU
Swissbit AG, October 2013
Manuela Kögel
Head of Quality Management
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15 RoHS and WEEE update from Swissbit
Dear Valued Customer,
We at Swissbit place great value on the environment and thus pay close attention to the diverse aspects of
manufacturing environmentally and health friendly products. The European Parliament and the Council of the
European Union have published two Directives defining a European standard for environmental protection. This
states that CompactFlash Cards must comply with both Directives in order for them to be sold on the European
market:
RoHS – Restriction of Hazardous Substances
WEEE – Waste Electrical and Electronic Equipment
Swissbit would like to take this opportunity to inform our customers about the measures we have implemented to
adapt all our products to the European norms.
What is the WEEE Directive (2002/96/EC)?
The Directive covers the following points:
Prevention of WEEE
Recovery, recycling and other measures leading to a minimization of wastage of electronic and
electrical equipment
Improvement in the quality of environmental performance of all operators involved in the EEE life
cycle, as well as measures to incorporate those involved at the EEE waste disposal points
What are the key elements?
The WEEE Directive covers the following responsibilities on the part of producers:
Producers must draft a disposal or recovery scheme to dispose of EEE correctly.
Producers must be registered as producers in the country in which they distribute the goods.
They must also supply and publish information about the EEE categories.
Producers are obliged to finance the collection, treatment and disposal of WEEE.
Inclusion of WEEE logos on devices
In reference to the Directive, the WEEE logo must be printed directly on all devices that have sufficient space. «In
exceptional cases where this is necessary because of the size of the product, the symbol of the WEEE Directive
shall be printed on the packaging, on the instructions of use and on the warranty»
(WEEE Directive 2002/96/EC)
When does the WEEE Directive take effect?
The Directive came into effect internationally on 13 August, 2005.
What is RoHS (2002/95/EC)?
The goals of the Directive are to:
Place less of a burden on human health and to protect the environment by restricting the use of
hazardous substances in new electrical and electronic devices
To support the WEEE Directive (see above)
RoHS enforces the restriction of the following 6 hazardous substances in electronic and electrical devices:
Lead (Pb) – no more than 0.1% by weight in homogeneous materials
Mercury (Hg) – no more than 0.1% by weight in homogeneous materials
Cadmium (Cd) – no more than 0.01% by weight in homogeneous materials
Chromium (Cr6+) – no more than 0.1% by weight in homogeneous materials
PBB, PBDE – no more than 0.1% by weight in homogeneous materials
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Swissbit is obliged to minimize the hazardous substances in the products.
According to part of the Directive, manufacturers are obliged to make a self-declaration for all devices with RoHS.
Swissbit carried out intensive tests to comply with the self-declaration. We have also already taken steps to have
the analyses of the individual components guaranteed by third-party companies.
Swissbit carried out the following steps during the year with the goal of offering our customers products that are
fully compliant with the RoHS Directive.
Preparing all far-reaching directives, logistical enhancements and alternatives regarding the full
understanding and introduction of the RoHS Directive’s standards
Checking the components and raw materials:
o Replacing non-RoHS-compliant components and raw materials in the supply chain
o Cooperating closely with suppliers regarding the certification of all components and raw
materials used by Swissbit
Modifying the manufacturing processes and procedures
o Successfully adapting and optimizing the new management-free integration process in
the supply chain
o Updating existing production procedures and introducing the new procedures to support
the integration process and the sorting of materials
Carrying out the quality process
o Performing detailed function and safety tests to ensure the continuous high quality of the
Swissbit product line
When does the RoHS Directive take effect?
As of 1 July, 2006, only new electrical and electronic devices with approved quantities of RoHS will be put on the
market.
When will Swissbit be offering RoHS-approved products?
Swissbit’s RoHS-approved products are available now. Please contact your Swissbit contact person to find out
more about exchanging your existing products for RoHS-compliant devices.
For your attention
We understand that packaging and accessories are not EEE material and are therefore not subject to the WEEE or
RoHS Directives.
Contact details:
Swissbit AG
Industriestrasse 4-8
CH 9552 Bronschhofen
Tel: +41 71 913 03 03 – Fax: +41 71 913 03 15
E-mail: info@swissbit.com – Website: www.swissbit.com
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16 Part Number Decoder
S
F
CF
32GB
H
2
B
U
4
TO
-
I
-
Q
T
-
517
-
STD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Manuf.
Option
Memory Type
Configuration
Product Type
Manuf. Code: Flash Mode
Density
Manuf. Code: Flash Package
Form Factor
Temp. Option
Product Generation
Flash vendor Code
Memory Organization
Number of flash chips
Technology
16.1 Manufacturer
Swissbit code
S
16.2 Memory Type
Flash
F
16.3 Product Type
Compact Flash
CF
16.4 Density
2 GByte
2048
4 GByte
4096
8 GByte
8192
16 GByte
16GB
32 GByte
32GB
64GByte
64GB
128 GByte
128G
16.5 Platform
Compact Flash
H
16.6 Product Generation
First generation
1
Second generation
2
16.7 Memory Organization
x8
B
16.8 Controller type
C-400 Series
CF Card
U
16.9 Number of Flash Chip
1 Flash
1
2 Flash
2
4 Flash
4
16.10 Flash Code
Toshiba
TO
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Micron
MT
Samsung
SA
16.11 Temp. Option
Industrial Temp. Range -40°C …+85°C
I
Standard Temp Range 0°C …+70°C
C
16.12 DIE Classification
SLC MONO (single die package)
M
SLC DDP (dual die package)
D
SLC QDP (quad die package)
Q
SLC ODP (Octal die package)
N
16.13 PIN Mode
Normal nCE & R/nB - TSOP
S
Dual nCE & Dual R/nB - TSOP
T
Quad nCE & Quad R/nB - TSOP
U
Normal nCE & R/nB – LGA
A
Dual nCE & Dual R/nB – LGA
B
Quad nCE & Quad R/nB – LGA
C
16.14 Compact Flash XYZ
X CFC Mode
Removable/fix
PIO
DMA
support
X
True IDE
Mode
PC Card
Mode
Removable
yes
yes
1
Fix
yes
yes
2
Fix
yes
-
3
Removable
yes
-
4
Fix
Removable
yes
yes
5*
Fix
Removable
yes
-
6
*default
Y Firmware revision per product generation
FW Revision
Y
First FW Revision
1
Second FW Revision
2
Z
max performance index
Max PIO Mode / CIS
Z
PIO4 (MDMA2 if enabled)
1
PIO6 (MDMA4 if enabled)
2
UDMA4 (PIO6, MDMA4)
3
UDMA6 (MDMA2, PIO4)
6
UDMA6 (MDMA4, PIO6)
7
16.15 Option
Standard
STD
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17 Swissbit CF Label specification
17.1 Front side label
17.2 Back side label
17.2.1 Label content
o Swissbit logo
o CF logo
o Part number (defined by the data sheet)
o Barcode as assembly lot number (Code128)
o Lot number
o CE logo
o RoHS logo
o WEEE logo
o Manufacturing date
o “Made in Germany”
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18 Revision History
Table 143: Document Revision History
Date
Revision
Details
March 28, 2012
1.00
Initial release
December 18, 2012
1.10
New CE Declaration, new picture of the back side label
May 30, 2013
1.20
Added FW 2, PC-Card specification limitation
July 26, 2013
1.21
Added Trim Status attribute
September 25, 2013
1.22
3.3V operating voltage expanded to ±10%
Disclaimer:
No part of this document may be copied or reproduced in any form or by any means, or transferred to any third
party, without the prior written consent of an authorized representative of Swissbit AG (“SWISSBIT”). The
information in this document is subject to change without notice. SWISSBIT assumes no responsibility for any
errors or omissions that may appear in this document, and disclaims responsibility for any consequences resulting
from the use of the information set forth herein. SWISSBIT makes no commitments to update or to keep current
information contained in this document. The products listed in this document are not suitable for use in
applications such as, but not limited to, aircraft control systems, aerospace equipment, submarine cables, nuclear
reactor control systems and life support systems. Moreover, SWISSBIT does not recommend or approve the use of
any of its products in life support devices or systems or in any application where failure could result in injury or
death. If a customer wishes to use SWISSBIT products in applications not intended by SWISSBIT, said customer
must contact an authorized SWISSBIT representative to determine SWISSBIT willingness to support a given
application. The information set forth in this document does not convey any license under the copyrights, patent
rights, trademarks or other intellectual property rights claimed and owned by SWISSBIT. The information set forth
in this document is considered to be “Proprietary” and “Confidential” property owned by SWISSBIT.
ALL PRODUCTS SOLD BY SWISSBIT ARE COVERED BY THE PROVISIONS APPEARING IN SWISSBIT’S TERMS AND CONDITIONS OF
SALE ONLY, INCLUDING THE LIMITATIONS OF LIABILITY, WARRANTY AND INFRINGEMENT PROVISIONS. SWISSBIT MAKES NO
WARRANTIES OF ANY KIND, EXPRESS, STATUTORY, IMPLIED OR OTHERWISE, REGARDING INFORMATION SET FORTH HEREIN OR
REGARDING THE FREEDOM OF THE DESCRIBED PRODUCTS FROM INTELLECTUAL PROPERTY INFRINGEMENT, AND EXPRESSLY
DISCLAIMS ANY SUCH WARRANTIES INCLUDING WITHOUT LIMITATION ANY EXPRESS, STATUTORY OR IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
©2013 SWISSBIT AG All rights reserved.
