Publication Number CFI_V1.4_VendorSpecificExtensions Revision A Amendment 0 Issue Date March 22, 2004
Common Flash Interface Version 1.4
Vendor Specific Extensions
Application Note
Introduction
This application note provides an overview of the changes implemented between
versions 1.3 and 1.4 of the SpansionTM Flash memory Common Flash Interface
(CFI) implementation.
CFI is a JEDEC standard database that may be read from a Flash memory. It al-
lows Flash driver software to query the installed device to determine the proper
configuration, e.g. memory size, speed, special features, and other
characteristics.
The JEDEC CFI standard provides for vendor specific extensions to the basic de-
vice information. These extensions provide information about optional device
features. As successive device generations add new features new fields are added
to the vendor specific extensions area.
2 Common Flash Interface Version 1.4 Vendor Specific Extensions
Application Note
Benefit
There are two main benefits of using CFI
Ease of upgrading memory density or features
Second source availability
CFI-compliant Flash allows the system designer to add and upgrade memory
without the inconvenience of modifying Flash driver software to adapt to each
new device in a product family. This holds true for new devices of higher density
or different sector architecture than available at the time of initial system and
driver development.
CFI Data Structure
From the CFI mode the user can access the following information (Note, the
subsequent CFI data tables are provided as examples only. For product-
specific CFI data, refer to the Spansion Datasheet):
1. CFI Identification String - A standard string of characters that any
CFI compliant device will display so that Flash driver software can
confirm that a CFI device is in use. See Table 1.
2. System Interface String - Information on device voltage and timing
parameter. See Table 2.
3. Device Geometry Definition - Information on command protocol, de-
vice size, and sector sizes. See Table 3.
4. Primary Vendor-Specific Extended Query - Information on vendor or
device specific features that are supported. See Table 4.
Ta b l e 1 . CFI Query Identification String
Addresses (x16) Data Description
10h
11h
12h
0051h
0052h
0059h
Query Unique ASCII String “QRY”
13h
14h
0002h
0000h Primary OEM Command Set
15h
16h
0040h
0000h Address for Primary Extended Table
17h
18h
0000h
0000h Alternate OEM Command Set (00h = none exists)
19h
1Ah
0000h
0000h Address for Alternate OEM Extended Table (00h = none exists)
Ta bl e 2 . System Interface String
Addresses (x16) Data Description
1Bh 0027h V
CC
Min. (Write/Erase)
D7-D4: volt, D3-D0: mV
1Ch 0036h V
CC
Max. (Write/Erase)
D7-D4: volt, D3-D0: mV
March 22, 2004 CFI_V1.4_VendorSpecificExtensionsA0Common Flash Interface Version 1.4 Vendor Specific Extensions 3
Application Note
1Dh 0000h V
PP
Min. voltage (00h = no V
PP
pin present)
1Eh 0000h V
PP
Max. voltage (00h = no V
PP
pin present)
1Fh 0007h Typical timeout per single byte/word 2
N
µs
20h 0007h Typical timeout for Min. size buffer write 2
N
µs (00h = not supported)
21h 0000h Typical timeout per individual block erase 2
N
ms
22h 0000h Typical timeout for full chip erase 2
N
ms (00h = not supported)
23h 0001h Max. timeout for byte/word write 2
N
times typical
24h 0005h Max. timeout for buffer write 2
N
times typical
25h 0004h Max. timeout per individual block erase 2
N
times typical
26h 0000h Max. timeout for full chip erase 2
N
times typical (00h = not supported)
Ta b l e 3 . CFI Device Geometry Definition
Addresses (x16) Data Description
27h 0018h Device size = 2
N
byte
28h
29h
0002h
0000h Flash device interface description (refer to CFI publication 100)
2Ah
2Bh
0005h
0000h Max. number of bye in multi-byte write = 2
N
(00h = not supported)
2Ch 0001h Number of erase block regions within device
(01h = uniform device, 02h = boot device)
2Dh
2Eh
2Fh
30h
00FFh
0000h
0000h
0001h
Erase block region 1 information
(refer to the CFI specification or CFI publication 100)
31h
32h
33h
34h
0000h
0000h
0000h
0000h
Erase block region 2 information
(refer to CFI publication 100)
35h
36h
37h
38h
0000h
0000h
0000h
0000h
Erase block region 3 information
(refer to CFI publication 100)
39h
3Ah
3Bh
3Ch
0000h
0000h
0000h
0000h
Erase block region 4 information
(refer to CFI publication 100)
Table 2. System Interface String (Continued)
Addresses (x16) Data Description
4 Common Flash Interface Version 1.4 Vendor Specific Extensions
Application Note
Changes
The major difference between SpansionTM memory specific CFI extensions version
1.3 and version 1.4 are the addition of these features in the Primary Vendor-Spe-
cific Extended Query section:
Unlock Bypass
SecSi Sector size
Hardware Reset Low Time-out during an embedded algorithm
Ta b l e 4 . Primary Vendor-Specific Extended Query
Addresses (x16) Data Description
40h
41h
42h
0050h
0052h
0049h
Query-unique ASCII string “PRI”
43h 0031h Major version number, ASCII
44h 0033h Minor version number, ASCII
45h 0004h
Address Sensitive Unlock (Bits 1-0)
0 = Required, 1 = Not Required
Silicon Technology (bits 5-2) 0001 = 0.17 µm
46h 0002h Erase Suspend
0 = Not Supported, 1 = To Read Only, 2 = To Read & Write
47h 0001h Sector Protect
00 = Not Supported, x = Number of sectors per group
48h 0000h Sector Temporary Unprotect
00 = Not Supported, 01 = Supported
49h 0005h Sector Protect / Unprotect scheme
04 = 29LV800 mode
4Ah 0063h Simultaneous Operation
Number of sectors in all banks except boot block
4Bh 0001h Burst Mode Type
00 = Not Supported, 01 = Supported
4Ch 0000h Page Mode Type
00 = Not Supported, 01 = 4 Word Page, 02 = 8 Word Page
4Dh 0085h ACC (Acceleration) Supply Minimum
00h = Not Supported, D7-D4: Volt, D3-D0: 100mV
4Eh 00C5h ACC (Acceleration) Supply Maximum
00h = Not Supported, D7-D4: Volt, D3-D0: 100mV
4Fh 00xxh Top/Bottom Boot Sector Flag
02h = Bottom Boot Device, 03h = Top Boot Device
50h 0000h Program Suspend. 00h = not supported
57h 0004h Bank Organization: x = Number of Banks
58h 0023h Bank A Region Information. x = Number of sectors in bank
59h 0020h Bank B Region Information. x = Number of sectors in bank
5Ah 0020h Bank C Region Information. x = Number of sectors in bank
5Bh 0023h Bank D Region Information. x = Number of sectors in bank
March 22, 2004 CFI_V1.4_VendorSpecificExtensionsA0Common Flash Interface Version 1.4 Vendor Specific Extensions 5
Application Note
Hardware Reset Low Time-out not during an embedded algorithm
Erase Suspend Time-out Maximum
Program Suspend Time-out Maximum
Increased Bank region information from four bank to thirty-two bank
These changes will be implemented in new SpansionTM Flash devices. The added
features are highlighted in Table 5. New Features are highlighted in bold face
type.
Ta b l e 5 . Updated Primary Vendor-Specific Extended Query
Address (byte mode) Data Description
40h
41h
42h
50h
52h
49h
query-unique ASCII string “PRI”
43h 31h Major version number ASCII
44h
34h Minor version ASCII
45h
Address Sensitive Unlock (DQ1,DQ0)
0000 (Hex) = required, 0001 (Hex) = NOT Required
Process Technology (
DQ5
-DQ2)
0001 (Hex) = 170-nm Floating Gate technology
0010 (Hex) = 230-nm MirrorBit
TM
technology
0011 (Hex) = 130-nm Floating Gate technology
0100 = 110-nm MirrorBit
TM
technology
0101 = 90-nm Floating Gate technology
0110 = 90-nm MirrorBit
TM
technology
46h Erase Suspend
00 = Not Supported, 01 = To read only, 02 = To read and write
47h Sector Protect
00 = Not Supported, X = Number of sectors per group
48h Sector Temporary Unprotect
00 = Not Supported, 01 = Supported
49h
Sector Protect/Unprotect scheme
01 = 29F040 mode
02 = 29F016 mode
03 = 29F400 mode
04 = 29LV800 mode -> RESET# or A9 =Vid
05 = Software command sector locking
06 = New Sector Protect
07 = RESET# or A9 =Vid + New Sector Protect
08 = Advanced Sector Protect
4Ah Simultaneous Operation
00 = Not Supported, X = Total number of sectors in all banks except BOOT BANK
4Bh
Burst Mode Type
00 = Not Supported, 01=Supported
4Ch Page Mode Type
00 = Not Supported, 01 = 4 word Page, 02 = 8 word Page, 03 = 16 word Page
4Dh
ACC (Acceleration) Supply Minimum
Bit 7-4 = Hex Value in Volts
Bit 3-0 = BCD Value in 100 Millivolts
6 Common Flash Interface Version 1.4 Vendor Specific Extensions
Application Note
4Eh
ACC (Acceleration) Supply Maximum
Bit 7-4 = Hex Value in Volts
Bit 3-0 = BCD Value in 100 Millivolts
4Fh
Top/Bottom Sector Flag
00 = No Boot
01 = 8x8kb, Sectors at TOP and Bottom
02 = Bottom Boot Device
03 = Top Boot Device
04 = Uniform Bottom Boot Device
0 5 = U n i f o r m To p B o o t D e v i c e
50h Program Suspend
00 = Not Supported, 01=Supported
51h
Unlock Bypass
00 = Not Supported, 01 = Supported
52h
SecSi Sector (Customer OTP Area) Size 2
N
(Bytes)
53h
Embedded Hardware Reset Timeout Maximum < 2
N
(ns)
54h
Non-Embedded Hardware Reset Timeout Maximum < 2
N
(ns)
55h
Erase Suspend Timeout Maximum < 2
N
(us)
56h
Program Suspend Timeout Maximum < 2
N
(us)
57h
Bank Organization
00 = If data at 4Ah is Zero
XX = Number of banks
58h Bank1 Region Information
= Number of sectors in Bank 1
59h Bank2 Region Information
= Number of sectors in Bank 2
5Ah Bank3 Region Information
= Number of sectors in Bank 3
5Bh Bank4 Region Information
= Number of sectors in Bank 4
5Ch
Bank5 Region Information
= Number of sectors in Bank 5
5Dh
Bank6 Region Information
= Number of sectors in Bank 6
5Eh
Bank7 Region Information
= Number of sectors in Bank 7
5Fh
Bank8 Region Information
= Number of sectors in Bank 8
60h
Bank9 Region Information
= Number of sectors in Bank 9
61h
Bank10 Region Information
= Number of sectors in Bank 10
62h
Bank11 Region Information
= Number of sectors in Bank 11
Table 5. Updated Primary Vendor-Specific Extended Query (Continued)
Address (byte mode) Data Description
March 22, 2004 CFI_V1.4_VendorSpecificExtensionsA0Common Flash Interface Version 1.4 Vendor Specific Extensions 7
Application Note
63h
Bank12 Region Information
= Number of sectors in Bank 12
64h
Bank13 Region Information
= Number of sectors in Bank 13
65h
Bank14 Region Information
= Number of sectors in Bank 14
66h
Bank15 Region Information
= Number of sectors in Bank 15
67h
Bank16 Region Information
= Number of sectors in Bank 16
68h
Bank17 Region Information
= Number of sectors in Bank 17
69h
Bank18 Region Information
= Number of sectors in Bank 18
6Ah
Bank19 Region Information
= Number of sectors in Bank 19
6Bh
Bank20 Region Information
= Number of sectors in Bank 20
6Ch
Bank21 Region Information
= Number of sectors in Bank 21
6Dh
Bank22 Region Information
= Number of sectors in Bank 22
6Eh
Bank23 Region Information
= Number of sectors in Bank 23
6Fh
Bank24 Region Information
= Number of sectors in Bank 24
70h
Bank25 Region Information
= Number of sectors in Bank 25
71h
Bank26 Region Information
= Number of sectors in Bank 26
72h
Bank27 Region Information
= Number of sectors in Bank 27
73h
Bank28 Region Information
= Number of sectors in Bank 28
74h
Bank29 Region Information
= Number of sectors in Bank 29
75h
Bank30 Region Information
= Number of sectors in Bank 30
76h
Bank31 Region Information
= Number of sectors in Bank 31
77h
Bank32 Region Information
= Number of sectors in Bank 32
Table 5. Updated Primary Vendor-Specific Extended Query (Continued)
Address (byte mode) Data Description
8 Common Flash Interface Version 1.4 Vendor Specific Extensions
Application Note
Conclusion
These changes enable updated Flash driver software to recognize and make use
of new device features.
March 22, 2004 CFI_V1.4_VendorSpecificExtensionsA0Common Flash Interface Version 1.4 Vendor Specific Extensions 9
Application Note
Revision Summary
Revision A (March 22, 2004)
Initial Release.
Trademarks and Notice
This document contains FASL confidential information. The contents of this document may not be copied nor duplicated in any form, in whole or in part,
without prior written consent from FASL. The information in this document is subject to change without notice. Product and Company names are trademarks
or registered trademarks of their respective owners
Copyright 2004 FASL LLC. All rights reserved.
