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P/N:PM0439 REV. 1.9 , APR. 03, 2002
MX29F400T/B
4M-BIT [512Kx8/256Kx16] CMOS FLASH MEMORY
erase cycle completion.
• Ready/Busy pin (RY/BY)
- Provides a hardware method of detecting program or
erase cycle completion.
- Sector protect/unprotect for 5V only system or 5V/
12V system.
• Sector protection
- Hardware method to disable any combination of
sectors from program or erase operations
• 100,000 minimum erase/program cycles
• Latch-up protected to 100mA from -1V to VCC+1V
• Boot Code Sector Architecture
- T = Top Boot Sector
- B = Bottom Boot Sector
• Low VCC write inhibit is equal to or less than 3.2V
• Package type:
- 44-pin SOP
- 48-pin TSOP
• Compatibility with JEDEC standard
- Pinout and software compatible with single-power
supply Flash
• 20 years data retention
FEATURES
• 524,288 x 8/262,144 x 16 switchable
• Single power supply operation
- 5.0V only operation for read, erase and program
operation
• Fast access time: 55/70/90/120ns
• Low power consumption
- 40mA maximum active current(5MHz)
- 1uA typical standby current
• Command register architecture
- Byte/word Programming (7us/12us typical)
- Sector Erase (Sector structure 16K-Bytex1, 8K-
Bytex2, 32K-Bytex1, and 64K-Byte x7)
• Auto Erase (chip & sector) and Auto Program
- Automatically erase any combination of sectors with
Erase Suspend capability.
- Automatically program and verify data at specified
address
• Erase suspend/Erase Resume
- Suspends an erase operation to read data from, or
program data to, another sector that is not being
erased, then resumes the erase.
• Status Reply
- Data polling & Toggle bit for detection of program and
GENERAL DESCRIPTION
The MX29F400T/B is a 4-mega bit Flash memory orga-
nized as 512K bytes of 8 bits or 256K words of 16 bits.
MXIC's Flash memories offer the most cost-effective
and reliable read/write non-volatile random access
memory . The MX29F400T/B is packaged in 44-pin SOP,
48-pin TSOP. It is designed to be reprogrammed and
erased in system or in standard EPROM programmers.
The standard MX29F400T/B offers access time as fast
as 55ns, allowing operation of high-speed microproces-
sors without wait states. To eliminate bus contention,
the MX29F400T/B has separate chip enable (CE) and
output enable (OE) controls.
MXIC's Flash memories augment EPROM functionality
with in-circuit electrical erasure and programming. The
MX29F400T/B uses a command register to manage this
functionality. The command register allows for 100%
TTL level control inputs and fixed power supply levels
during erase and programming, while maintaining maxi-
mum EPR OM compatibility.
MXIC Flash technology reliably stores memory contents
even after 100,000 erase and program cycles. The MXIC
cell is designed to optimize the erase and programming
mechanisms. In addition, the combination of advanced
tunnel oxide processing and low internal electric fields
for erase and program operations produces reliable cy-
cling. The MX29F400T/B uses a 5.0V±10% VCC sup-
ply to perform the High Reliability Erase and auto Pro-
gram/Erase algorithms.
The highest degree of latch-up protection is achieved
with MXIC's proprietary non-epi process. Latch-up pro-
tection is proved for stresses up to 100 milliamps on
address and data pin from -1V to VCC + 1V.
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MX29F400T/B
REV. 1.9, APR. 03, 2002
PIN CONFIGURATIONS
44 SOP(500 mil)
PIN DESCRIPTION
SYMBOL PIN NAME
A0~A17 Address Input
Q0~Q14 Data Input/Output
Q15/A-1 Q15(Word mode)/LSB addr(Byte mode)
CE Chip Enable Input
WE Write Enable Input
BYTE Word/Byte Selection input
RESET Hardware Reset Pin/Sector Protect Unlock
OE Output Enable Input
RY/BY Ready/Busy Output
VC C Power Supply Pin (+5V)
GND Ground Pin
48 TSOP (Standard Type) (12mm x 20mm)
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
NC
RY/BY
A17
A7
A6
A5
A4
A3
A2
A1
A0
CE
GND
OE
Q0
Q8
Q1
Q9
Q2
Q10
Q3
Q11
RESET
WE
A8
A9
A10
A11
A12
A13
A14
A15
A16
BYTE
GND
Q15/A-1
Q7
Q14
Q6
Q13
Q5
Q12
Q4
VCC
MX29F400T/B
A15
A14
A13
A12
A11
A10
A9
A8
NC
NC
WE
RESET
NC
NC
RY/BY
NC
A17
A7
A6
A5
A4
A3
A2
A1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
A16
BYTE
GND
Q15/A-1
Q7
Q14
Q6
Q13
Q5
Q12
Q4
VCC
Q11
Q3
Q10
Q2
Q9
Q1
Q8
Q0
OE
GND
CE
A0
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
MX29F400T/B
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MX29F400T/B
REV. 1.9, APR. 03, 2002
Sector Size Address Range (in hexadecimal)
(Kbytes/ (x8) (x16)
Sector A17 A16 A15 A14 A13 A12 Kwords) Address Range Address Range
SA0 0 0 0 X X X 64/32 00000h-0FFFFh 00000h-07FFFh
SA1 0 0 1 X X X 64/32 10000h-1FFFFh 08000h-0FFFFh
SA2 0 1 0 X X X 64/32 20000h-2FFFFh 10000h-17FFFh
SA3 0 1 1 X X X 64/32 30000h-3FFFFh 18000h-1FFFFh
SA4 1 0 0 X X X 64/32 40000h-4FFFFh 20000h-27FFFh
SA5 1 0 1 X X X 64/32 50000h-5FFFFh 28000h-2FFFFh
SA6 1 1 0 X X X 64/32 60000h-6FFFFh 30000h-37FFFh
SA7 1 1 1 0 X X 32/16 70000h-77FFFh 38000h-3BFFFh
SA81111008/4 78000h-79FFFh 3C000h-3CFFFh
SA91111018/4 7A000h-7BFFFh 3D000h-3DFFFh
SA10 1 1111X16/8 7C000h-7FFFFh 3E000h-3FFFFh
Sector Size Address Range (in hexadecimal)
(Kbytes/ (x8) (x16)
Sector A17 A16 A15 A14 A13 A12 Kwords) Address Range Address Range
SA000000X16/8 00000h-03FFFh 00000h-01FFFh
SA10000108/4 04000h-05FFFh 02000h-02FFFh
SA20000118/4 06000h-07FFFh 03000h-03FFFh
SA3 0 0 0 1 X X 32/16 08000h-0FFFFh 04000h-07FFFh
SA4 0 0 1 X X X 64/32 10000h-1FFFFh 08000h-0FFFFh
SA5 0 1 0 X X X 64/32 20000h-2FFFFh 10000h-17FFFh
SA6 0 1 1 X X X 64/32 30000h-3FFFFh 18000h-1FFFFh
SA7 1 0 0 X X X 64/32 40000h-4FFFFh 20000h-27FFFh
SA8 1 0 1 X X X 64/32 50000h-5FFFFh 28000h-2FFFFh
SA9 1 1 0 X X X 64/32 60000h-6FFFFh 30000h-37FFFh
SA10 1 1 1 X X X 64/32 70000h-7FFFFh 38000h-3FFFFh
Note: Address range is A17~A-1 in byte mode and A17~A0 in word mode.
SECTOR STRUCTURE
MX29F400T TOP BOOT SECTOR ADDRESS TABLE
MX29F400B BOTTOM BOOT SECTOR ADDRESS TABLE
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MX29F400T/B
REV. 1.9, APR. 03, 2002
BLOCK DIAGRAM
CONTROL
INPUT
LOGIC
PROGRAM/ERASE
HIGH V OLTA GE
WRITE
STATE
MACHINE
(WSM)
STATE
REGISTER
MX29F400T/B
FLASH
ARRAY
X-DECODER
ADDRESS
LATCH
AND
BUFFER
Y-PASS GATE
Y-DECODER
ARRAY
SOURCE
HV
COMMAND
DATA
DECODER
COMMAND
DATA LATCH
I/O BUFFER
PGM
DATA
HV
PROGRAM
DATA LATCH
SENSE
AMPLIFIER
Q0-Q15/A-1
A0-A17
CE
OE
WE
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MX29F400T/B
REV. 1.9, APR. 03, 2002
AUTOMATIC PROGRAMMING
The MX29F400T/B is byte programmable using the Au-
tomatic Programming algorithm. The Automatic Pro-
gramming algorithm makes the external system do not
need to have time out sequence nor to verify the data
programmed. The typical chip programming time at room
temperature of the MX29F400T/B is less than 4 sec-
onds.
AUTOMATIC CHIP ERASE
The entire chip is bulk erased using 10 ms erase pulses
according to MXIC's Automatic Chip Erase algorithm.
Typical erasure at room temperature is accomplished in
less than 4 second. The Automatic Erase algorithm au-
tomatically programs the entire array prior to electrical
erase. The timing and verification of electrical erase are
controlled internally within the device.
AUTOMATIC SECTOR ERASE
The MX29F400T/B is sector(s) erasable using MXIC's
Auto Sector Erase algorithm. Sector erase modes allow
sectors of the array to be erased in one erase cycle.
The Automatic Sector Erase algorithm automatically pro-
grams the specified sector(s) prior to electrical erase.
The timing and verification of electrical erase are con-
trolled internally within the device.
AUTOMATIC PROGRAMMING ALGORITHM
MXIC's Automatic Programming algorithm requires the
user to only write program set-up commands (including
2 unlock write cycle and A0H) and a program command
(progr am data and address). The de vice automatically
times the programming pulse width, provides the pro-
gram verification, and counts the number of sequences.
A status bit similar to D ATA polling and a status bit tog-
gling between consecutive read cycles, provide feed-
back to the user as to the status of the programming
operation.
AUTOMATIC ERASE ALGORITHM
MXIC's Automatic Erase algorithm requires the user to
write commands to the command register using stan-
dard microprocessor write timings. The device will auto-
matically pre-program and v erify the entire arra y. Then
the device automatically times the erase pulse width,
provides the erase verification, and counts the number
of sequences. A status bit toggling between consecu-
tive read cycles provides feedback to the user as to the
status of the programming operation.
Register contents serve as inputs to an internal state-
machine which controls the erase and programming cir-
cuitry . During write cycles, the command register inter-
nally latches address and data needed for the program-
ming and erase operations. During a system write cycle,
addresses are latched on the falling edge, and data are
latched on the rising edge of WE or CE, whichever hap-
pens first .
MXIC's Flash technology combines years of EPROM
e xperience to produce the highest le vels of quality, reli-
ability, and cost effectiveness. The MX29F400T/B elec-
trically erases all bits simultaneously using Fowler-
Nordheim tunneling. The bytes are programmed by us-
ing the EPROM programming mechanism of hot elec-
tron injection.
During a program cycle, the state-machine will control
the program sequences and command register will not
respond to any command set. During a Sector Erase
cycle, the command register will only respond to Erase
Suspend command. After Erase Suspend is completed,
the device stays in read mode. After the state machine
has completed its task, it will allow the command regis-
ter to respond to its full command set.
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MX29F400T/B
REV. 1.9, APR. 03, 2002
First Bus Second Bus Third Bus Fourth Bus Fifth Bus Sixth Bus
Command Bus Cycle Cycle Cycle Cycle Cycle Cycle
Cycle Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data
Reset 1 XXXH F0H
Read 1 RA RD
Read Silicon ID Word 4 555H AAH 2AAH 55H 555H 90H ADI DDI
Byte 4 AAAH AAH 555H 55H AAAH 90H ADI DDI
Sector Protect Word 4 555H AAH 2AAH 55H 555H 90H (SA) XX00H
Verify x02H XX01H
Byte 4 AAAH AAH 555H 55H AAAH 90H (SA) 00H
x04H 01H
Program Word 4 555H AAH 2AAH 55H 555H A0H PA PD
Byte 4 AAAH AAH 555H 55H AAAH A0H PA PD
Chip Erase Word 6 555H AAH 2AAH 55H 555H 80H 555H AAH 2AAH 55H 555H 10H
Byte 6 AAAH AAH 555H 55H AAAH 80H AAAH AAH 555H 55H AAAH 10H
Sector Erase Word 6 555H AAH 2AAH 55H 555H 80H 555H AAH 2AAH 55H SA 30H
Byte 6 AAAH AAH 555H 55H AAAH 80H AAAH AAH 555H 55H SA 30H
Sector Erase Suspend 1 XXXH B0H
Sector Erase Resume 1 XXXH 3 0H
Unlock for sector 6 555H AAH 2AAH 55H 555H 80H 555H AAH 2AAH 55H 555H 20H
protect/unprotect
T ABLE1. SOFTW ARE COMMAND DEFINITIONS
Note:
1. ADI = Address of Device identifier; A1=0, A0 = 0 for manufacture code,A1=0, A0 = 1 for device code, A2~A17=do not care.
(Refer to table 3)
DDI = Data of Device identifier : C2H for manufacture code, 23H/ABH (x8) and 2223H/22ABH (x16) for device code.
X = X can be VIL or VIH
RA=Address of memory location to be read.
RD=Data to be read at location RA.
2.PA = Address of memor y location to be programmed.
PD = Data to be programmed at location PA.
SA = Address to the sector to be erased.
3.The system should generate the following address patterns: 555H or 2AAH to Address A10~A0 in word mode/AAAH or
555H to Address A10~A-1 in byte mode.
Address bit A11~A17=X=Don't care for all address commands except for Program Address (PA) and Sector
Address (SA). Write Sequence may be initiated with A11~A17 in either state.
4. F or Sector Protect Verify operation:If read out data is 01H, it means the sector has been protected. If read out data is 00 H, it
means the sector is still not being protected.
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MX29F400T/B
REV. 1.9, APR. 03, 2002
Pins CE OE WE A0 A1 A6 A9 Q0 ~ Q 15
Mode
Read Silicon ID L L H L L X VID(2) C2H (Byte mode)
Manufacture Code(1) 00C2H (Word mode)
Read Silicon ID L L H H L X VID(2) 23H/ABH (Byte mode)
Device Code(1) 2223H/22ABH (Word mode)
Read L L H A0 A1 A6 A9 DOUT
Standby H XXXXXX HIGH Z
Output Disable L H H XXXX HIGH Z
Write L H L A0 A1 A6 A9 DIN(3)
Sector Protect with 12V L VID(2) L X X L VID(2) X
system(6)
Chip Unprotect with 12V L VID(2) L X X H VID(2) X
system(6)
Verify Sector Protect L L H X H X VID(2) Code(5)
with 12V system
Sector Protect without 12V L H L X X L H X
system (6)
Chip Unprotect without 12V L H L X X H H X
system (6)
Verify Sector Protect/Unprotect L L H X H X H Code(5)
without 12V system (7)
Reset X XXXXXX HIGH Z
T ABLE 2. MX29F400T/B BUS OPERA TION
NOTES:
1. Manufacturer and device codes may also be accessed via a command register write sequence. Refer to Table 1.
2. VID is the Silicon-ID-Read high voltage, 11.5V to 12.5V.
3. Refer to Table 1 for valid Data-In during a write operation.
4. X can be VIL or VIH.
5. Code=00H/XX00H means unprotected.
Code=01H/XX01H means protected.
A17~A12=Sector address for sector protect.
6. Refer to sector protect/unprotect algorithm and waveform.
Must issue "unlock for sector protect/unprotect" command before "sector protect/unprotect without 12V system" command.
7. The "verify sector protect/unprotect without 12V system" is only following "Sector protect/unprotect without 12V system"
command.
Note that the Erase Suspend (B0H) and Erase Resume
(30H) commands are valid only while the Sector Erase
operation is in progress. Either of the two reset com-
mand sequences will reset the device(when applicable).
COMMAND DEFINITIONS
Device operations are selected by writing specific address
and data sequences into the command register. Writing
incorrect address and data values or writing them in the
improper sequence will reset the device to the read mode.
Table 1 defines the valid register command sequences.
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MX29F400T/B
REV. 1.9, APR. 03, 2002
READ/RESET COMMAND
The read or reset operation is initiated by writing the
read/reset command sequence into the command reg-
ister. Microprocessor read cycles retrieve array data.
The device remains enabled for reads until the command
register contents are altered.
If program-fail or erase-fail happen, the write of F0H will
reset the device to abor t the operation. A valid com-
mand must then be written to place the device in the
desired state.
SILICON-ID-READ COMMAND
Flash memories are intended for use in applications where
the local CPU alters memory contents. As such, manu-
facturer and device codes must be accessible while the
device resides in the target system. PROM program-
mers typically access signature codes by raising A9 to
a high voltage. However, multiplexing high voltage onto
address lines is not generally desired system design
practice.
The MX29F400T/B contains a Silicon-ID-Read opera-
tion to supplement traditional PROM programming meth-
odology. The operation is initiated by writing the read
silicon ID command sequence into the command regis-
ter. Following the command write, a read cycle with
A1=VIL,A0=VIL retrieves the manufacturer code of C2H/
00C2H. A read cycle with A1=VIL, A0=VIH returns the
device code of 23H/2223H for MX29F400T, ABH/22ABH
for MX29F400B.
SET-UP AUTOMATIC CHIP/SECTOR ERASE
Pins A0 A1 Q15~Q8 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 Code(Hex)
Manufacture code Word VIL VIL 00H 1 1 0 0 0 0 1 0 00C2H
Byte VIL VIL X 1 1 0 0 0 0 1 0 C2H
Device code Word VIH VIL 22H 0 0 1 0 0 0 1 1 2223H
for MX29F400T Byte VIH VIL X 0 0 1 0 0 0 1 1 2 3 H
Device code Word VIH VIL 22H 1 0 1 0 1 0 1 1 22ABH
for MX29F400B Byte VIH VIL X 1 0 1 0 1 0 1 1 ABH
Sector Protection X VIH X 0 0 0 0 0 0 0 1 01H (Protected)
Verification X VIH X 0 0 0 0 0 0 0 0 00H (Unprotected)
T ABLE 3. EXPANDED SILICON ID CODE
COMMANDS
Chip erase is a six-b us cycle oper ation. There are two
"unlock" write cycles. These are followed b y writing the
"set-up" command 80H. Two more "unlock" wr ite cy-
cles are then followed by the chip erase command 10H.
The Automatic Chip Erase does not require the device
to be entirely pre-programmed prior to executing the Au-
tomatic Chip Erase. Upon executing the Automatic Chip
Erase, the device will automatically program and verify
the entire memory for an all-zero data pattern. When the
device is automatically verified to contain an all-zero
pattern, a self-timed chip erase and verify begin. The
erase and verify operations are completed when the data
on Q7 is "1" at which time the device returns to the
Read mode. The system is not required to provide any
control or timing during these operations.
When using the Automatic Chip Erase algorithm, note
that the erase automatically terminates when adequate
erase margin has been achieved for the memory array(no
erase verification command is required).
If the Erase operation was unsuccessful, the data on
Q5 is "1"(see Table 4), indicating the erase operation
exceed internal timing limit.
The automatic erase begins on the rising edge of the
last WE or CE, whichever happens later, pulse in the
command sequence and terminates when the data on
Q7 is "1" and the data on Q6 stops toggling for two con-
secutive read cycles, at which time the device returns
to the Read mode.
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MX29F400T/B
REV. 1.9, APR. 03, 2002
Status Q7 Q6 Q5 Q3 Q2 RY/BY
Note1 Note2
Byte Program in Auto Program Algorithm Q7 Toggle 0 N/A No 0
Toggle
Auto Erase Algorithm 0 Toggle 0 1 Toggle 0
Erase Suspend Read 1 No 0 N/A Toggle 1
(Erase Suspended Sector) Toggle
In Progress Erase Suspended Mode Erase Suspend Read Data Data Data Data Data 1
(Non-Erase Suspended Sector)
Erase Suspend Program Q7 Toggle 0 N/A N/A 0
Byte Program in Auto Program Algorithm Q7 Toggle 1 N/A No 0
Toggle
Exceeded
Time Limits Auto Erase Algorithm 0 Toggle 1 1 Toggle 0
Erase Suspend Program Q7 Toggle 1 N/A N/A 0
erase margin has been achieved for the memory array
(no erase verification command is required). Sector
erase is a six-bus cycle operation. There are two "un-
lock" write cycles. These are followed by writing the set-
up command 80H. Two more "unlock" write cycles are
then followed by the sector erase command 30H. The
sector address is latched on the falling edge of WE or
CE, whichever happens later , while the command(data)
is latched on the rising edge of WE or CE, whichever
happens first. Sector addresses selected are loaded
into internal register on the sixth falling edge of WE or
CE, whichever happens later. Each successive sector
load cycle started by the falling edge of WE or CE, which-
ever happens later, must begin within 30us from the
rising edge of the preceding WE or CE, whiche v er hap-
pens First, otherwise, the loading period ends and inter-
nal auto sector erase cycle starts. (Monitor Q3 to deter-
mine if the sector erase timer window is still open, see
section Q3, Sector Erase Timer.) Any command other
than Sector Erase(30H) or Erase Suspend(B0H) during
the time-out period resets the device to read mode.
SECTOR ERASE COMMANDS
The Automatic Sector Erase does not require the de-
vice to be entirely pre-programmed prior to executing
the Automatic Set-up Sector Erase command and Auto-
matic Sector Erase command. Upon executing the Au-
tomatic Sector Erase command, the device will auto-
matically program and verify the sector(s) memory for
an all-zero data pattern. The system is not required to
provide any control or timing during these operations.
When the sector(s) is automatically verified to contain
an all-zero pattern, a self-timed sector erase and verify
begin. The erase and verify operations are complete
when the data on Q7 is "1" and the data on Q6 stops
toggling for two consecutive read cycles, at which time
the device returns to the Read mode. The system is not
required to provide any control or timing during these
operations.
When using the Automatic Sector Erase algorithm, note
that the erase automatically terminates when adequate
T able 4. Write Operation Status
Note:
1. Q7 and Q2 require a valid address when reading status information. Refer to the appropriate subsection for further
details.
2. Q5 switches to '1' when an Auto Program or Auto Erase operation has exceeded the maximum timing limits.
See "Q5:Exceeded Timing Limits " for more information.
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MX29F400T/B
REV. 1.9, APR. 03, 2002
ERASE SUSPEND
This command only has meaning while the state ma-
chine is executing Automatic Sector Erase operation,
and therefore will only be responded during Automatic
Sector Erase operation. When the Erase Suspend com-
mand is written during a sector erase operation, the de-
vice requires a maximum of 100us to suspend the erase
operations. However, When the Erase Suspend command
is written during the sector erase time-out, the device
immediately terminates the time-out period and suspends
the erase operation. After this command has been ex-
ecuted, the command register will initiate erase suspend
mode. The state machine will return to read mode auto-
matically after suspend is ready. At this time, state ma-
chine only allows the command register to respond to
the Read Memor y Array, Erase Resume and program
commands.
The system can determine the status of the program
operation using the Q7 or Q6 status bits, just as in the
standard program operation. After an erase-suspend pro-
gram operation is complete, the system can once again
read array data within non-suspended sectors.
ERASE RESUME
This command will cause the command register to clear
the suspend state and return back to Sector Erase mode
but only if an Erase Suspend command was previously
issued. Erase Resume will not have any effect in all
other conditions. Another Erase Suspend command can
be written after the chip has resumed erasing.
SET-UP AUTOMATIC PROGRAM
COMMANDS
To initiate Automatic Program mode, A three-cycle com-
mand sequence is required. There are two "unlock" write
cycles. These are followed by writing the Automatic Pro-
gram command A0H.
Once the Automatic Program command is initiated, the
next WE or CE, pulse causes a transition to an active
programming operation. Addresses are latched on the
falling edge, and data are internally latched on the
rising edge of the WE or CE, whichever happens first,
pulse. The rising edge of WE or CE, whichever happens
first, also begins the programming oper ation. The sys-
tem is not required to provide further controls or timings.
The device will automatically provide an adequate inter-
nally generated program pulse and verify margin.
If the program operation was unsuccessful, the data on
Q5 is "1"(see Table 4), indicating the program operation
exceed internal timing limit. The automatic programming
operation is completed when the data read on Q6 stops
toggling for two consecutive read cycles and the data
on Q7 and Q6 are equivalent to data written to these two
bits, at which time the device returns to the Read mode(no
program verify command is required).
DATA POLLING-Q7
The MX29F400T/B also features Data Polling as a
method to indicate to the host system that the Auto-
matic Program or Erase algorithms are either in progress
or completed.
While the Automatic Programming algorithm is in opera-
tion, an attempt to read the device will produce the
complement data of the data last written to Q7. Upon
completion of the Automatic Program Algorithm an at-
tempt to read the device will produce the true data last
written to Q7. The Data P olling feature is v alid after the
rising edge of the fourth WE or CE, whichev er happens
first, pulse of the four write pulse sequences for auto-
matic program.
While the Automatic Erase algorithm is in operation, Q7
will read "0" until the erase operation is competed. Upon
completion of the erase operation, the data on Q7 will
read "1". The Data Polling feature is valid after the rising
edge of the sixth WE or CE, whichever happens first
pulse of six write pulse sequences for automatic chip/
sector erase.
The Data Polling feature is active during Automatic Pro-
gram/Erase algorithm or sector erase time-out. (see sec-
tion Q3 Sector Erase Timer)
RY/BY:Ready/Busy
The RY/BY is a dedicated, open-drain output pin that
indicates whether an Automatic Erase/Program algorithm
is in progress or complete. The RY/BY status is valid
after the rising edge of the final WE or CE, whichever
happens first, pulse in the command sequence. Since
R Y/BY is an open-drain output, several R Y/BY pins can
be tied together in parallel with a pull-up resistor to Vcc.
11
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MX29F400T/B
REV. 1.9, APR. 03, 2002
Q2:Toggle Bit II
The "Toggle Bit II" on Q2, when used with Q6, indicates
whether a par ticular sector is actively erasing (that is,
the Automatic Erase algorithm is in process), or whether
that sector is erase-suspended. Toggle Bit I is v alid af-
ter the rising edge of the final WE or CE, whichever hap-
pens first, pulse in the command sequence.
Q2 toggles when the system reads at addresses within
those sectors that have been selected for erasure. (The
system may use either OE or CE to control the read
cycles.) But Q2 cannot distinguish whether the sector
is actively erasing or is erase-suspended. Q6, by com-
parison, indicates whether the device is actively eras-
ing, or is in Erase Suspend, but cannot distinguish which
sectors are selected f or erasure. Thus , both status bits
are required for sectors and mode information. Refer to
Table 4 to compare outputs f or Q2 and Q6.
Reading Toggle Bits Q6/ Q2
Whenever the system initially begins reading toggle bit
status, it must read Q7-Q0 at least twice in a row to
determine whether a toggle bit is toggling. T ypically, the
system would note and store the value of the toggle bit
after the first read. After the second read, the system
would compare the new value of the toggle bit with the
first. If the toggle bit is not toggling, the device has
completed the program or erase operation. The system
can read array data on Q7-Q0 on the following read cycle.
How ev er, if after the initial tw o read cycles , the system
determines that the toggle bit is still toggling, the sys-
tem also should note whether the value of Q5 is high
(see the section on Q5). If it is, the system should then
determine again whether the toggle bit is toggling, since
the toggle bit may have stopped toggling just as Q5 went
high. If the toggle bit is no longer toggling, the device
has successfully completed the program or erase op-
eration. If it is still toggling, the device did not complete
the operation successfully, and the system must wr ite
the reset command to return to reading array data.
The remaining scenario is that system initially determines
that the toggle bit is toggling and Q5 has not gone high.
The system may continue to monitor the toggle bit and
Q5 through successive read cycles, determining the sta-
tus as described in the previous paragraph. Alterna-
tively, it may choose to perform other system tasks. In
this case, the system must start at the beginning of the
algorithm when it returns to determine the status of the
operation.
Q6:Toggle BIT I
Toggle Bit I on Q6 indicates whether an A utomatic Pro-
gram or Erase algorithm is in progress or complete, or
whether the device has entered the Erase Suspend mode.
Toggle Bit I may be read at any address, and is valid
after the rising edge of the final WE or CE, whichever
happens first, pulse in the command sequence (prior to
the program or erase operation), and during the sector
time-out.
During an Automatic Program or Erase algorithm opera-
tion, successive read cycles to any address cause Q6
to toggle. The system ma y use either OE or CE to con-
trol the read cycles. When the operation is complete, Q6
stops toggling.
After an erase command sequence is written, if all sec-
tors selected for erasing are protected, Q6 toggles and
returns to reading array data. If not all selected sectors
are protected, the Automatic Erase algorithm erases the
unprotected sectors, and ignores the selected sectors
that are protected.
The system can use Q6 and Q2 together to determine
whether a sector is actively erasing or is erase sus-
pended. When the device is actively erasing (that is, the
Automatic Erase algorithm is in progress), Q6 toggling.
When the device enters the Erase Suspend mode, Q6
stops toggling. Howe v er, the system must also use Q2
to determine which sectors are erasing or erase-sus-
pended. Alternativ ely, the system can use Q7.
If a program address f alls within a protected sector, Q6
toggles for approximately 2 us after the program com-
mand sequence is written, then returns to reading array
data.
Q6 also toggles during the erase-suspend-program mode,
and stops toggling once the Automatic Program algo-
rithm is complete.
Table 4 sho ws the outputs for Toggle Bit I on Q6.
If the output is low (Busy), the device is actively erasing
or programming. (This includes programming in the Erase
Suspend mode.) If the output is high (Ready), the de-
vice is ready to read array data (including during the
Erase Suspend mode), or is in the standby mode.
Tab le 4 shows the outputs f or R Y/BY.
12
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MX29F400T/B
REV. 1.9, APR. 03, 2002
Q5
Exceeded Timing Limits
Q5 will indicate if the program or erase time has ex-
ceeded the specified limits (internal pulse count). Under
these conditions Q5 will produce a "1". This time-out
condition indicates that the program or erase cycle was
not successfully completed. Data Polling and Toggle Bit
are the only operating functions of the device under this
condition.
If this time-out condition occurs during sector erase op-
eration, it specifies that a particular sector is bad and it
may not be reused. Howev er, other sectors are still func-
tional and may be used for the program or erase opera-
tion. The device must be reset to use other sectors.
Write the Reset command sequence to the device, and
then execute program or erase command sequence. This
allows the system to continue to use the other active
sectors in the device.
If this time-out condition occurs during the chip erase
operation, it specifies that the entire chip is bad or com-
bination of sectors are bad.
If this time-out condition occurs during the byte program-
ming operation, it specifies that the entire sector con-
taining that byte is bad and this sector maynot be re-
used, (other sectors are still functional and can be re-
used).
The time-out condition may also appear if a user tries to
program a non blank location without erasing. In this
case the device locks out and never completes the Au-
tomatic Algorithm operation. Hence, the system never
reads a valid data on Q7 bit and Q6 never stops tog-
gling. Once the Device has exceeded timing limits, the
Q5 bit will indicate a "1". Please note that this is not a
device failure condition since the device was incorrectly
used.
DATA PROTECTION
The MX29F400T/B is designed to offer protection against
accidental erasure or programming caused by spurious
system level signals that may exist during power transi-
tion. During power up the device automatically resets
the state machine in the Read mode. In addition, with
its control register architecture, alteration of the memory
contents only occurs after successful completion of spe-
cific command sequences. The device also incorpo-
rates several features to prevent inadvertent write cycles
TEMPORARY SECTOR UNPROTECT
This feature allows temporary unprotection of previously
protected sector to change data in-system. The Tempo-
rary Sector Unprotect mode is activated by setting the
RESET pin to VID(11.5V -12.5V). During this mode, for-
merly protected sectors can be programmed or erased
as un-protected sector. Once VID is remove from the
RESET pin, all the previously protected sectors are pro-
tected again.
Q3
Sector Erase Timer
After the completion of the initial sector erase command
sequence, the sector erase time-out will begin. Q3 will
remain low until the time-out is complete. Data P olling
and T oggle Bit are valid after the initial sector erase com-
mand sequence.
If Data P olling or the Toggle Bit indicates the de vice has
been written with a valid erase command, Q3 may be
used to determine if the sector erase timer window is
still open. If Q3 is high ("1") the internally controlled
erase cycle has begun; attempts to write subsequent
commands to the device will be ignored until the erase
operation is completed as indicated by Data Polling or
Toggle Bit. If Q3 is low ("0"), the device will accept
additional sector erase commands. To insure the com-
mand has been accepted, the system software should
check the status of Q3 prior to and following each sub-
sequent sector erase command. If Q3 were high on the
second status check, the command may not have been
accepted.
WRITE PULSE "GLITCH" PROTECTION
Noise pulses of less than 5ns(typical) on CE or WE will
not initiate a write cycle.
LOGICAL INHIBIT
Writing is inhibited by holding an y one of OE = VIL, CE
= VIH or WE = VIH. To initiate a write cycle CE and WE
must be a logical zero while OE is a logical one.
POWER SUPPLY DECOUPLING
In order to reduce power switching effect, each device
should have a 0.1uF ceramic capacitor connected be-
tween its VCC and GND .
resulting from VCC power-up and power-down transition
or system noise.
13
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
Temporary Sector Unprotect Operation
Start
RESET = VID (Note 1)
Perform Erase or Program Operation
RESET = VIH
Temporary Sector Unprotect Completed(Note 2)
Operation Completed
2. All previously protected sectors are protected again.
Note : 1. All protected sectors are temporary unprotected.
VID=11.5V~12.5V
14
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
RESET
CE
WE
RY/BY
tVIDR tVIDR
Program or Erase Command Sequence
12V
0 or 5V 0 or 5V
tRSP
TEMPORARY SECTOR UNPROTECT
Parameter Std. Description Test Setup All Speed Options Unit
tVIDR VID Rise and F all Time (See Note) Mi n 5 00 ns
tRSP RESET Setup Time for Temporary Sector Unprotect Min 4 us
Note:
Not 100% tested
Temporary Sector Unprotect Timing Diagram
15
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
RESET TIMING WAVEFORM
AC CHARACTERISTICS
Parameter Std Description Test Setup All Speed Options Unit
tREAD Y1 RESET PIN Low (During Automatic Algorithms) MAX 2 0 us
to Read or Write (See Note)
tREAD Y2 RESET PIN Low (NOT During A utomatic MAX 5 00 ns
Algorithms) to Read or Write (See Note)
tRP1 RESET Pulse Width (During Automatic Algorithms) MIN 1 0 us
tRP2 RESET Pulse Width (NOT During Automatic Algorithms) MIN 500 ns
tRH RESET High Time Before Read(See Note) MIN 0 ns
tRB1 RY/BY Recov ery Time(to CE, OE go low) MI N 0 ns
tRB2 RY/BY Recovery Time(to WE go low) MIN 50 ns
Note:Not 100% tested
tRH
tRB1
tRB2
tReady1
tRP2
tRP1
tReady2
RY/BY
CE, OE
RESET
Reset Timing NOT during Automatic Algorithms
Reset Timing during Automatic Algorithms
RY/BY
CE, OE
RESET
WE
16
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MX29F400T/B
REV. 1.9, APR. 03, 2002
SECTOR PROTECTION WITH 12V SYSTEM
The MX29F400T/B features hardware sector protection.
This feature will disable both program and erase opera-
tions for these sectors protected. T o activ ate this mode,
the programming equipment must force VID on address
pin A9 and control pin OE, (suggest VID = 12V) A6 =
VIL and CE = VIL.(see Table 2) Programming of the
protection circuitry begins on the falling edge of the WE
pulse and is terminated on the rising edge. Please refer
to sector protect algorithm and waveform.
To verify programming of the protection circuitry , the pro-
gramming equipment must force VID on address pin A9
( with CE and OE at VIL and WE at VIH). When A1=1, it
will produce a logical "1" code at device output Q0 for a
protected sector. Otherwise the device will produce 00H
for the unprotected sector. In this mode, the addresses,
except for A1, are don't care. Address locations with A1
= VIL are reserved to read manufacturer and device
codes.(Read Silicon ID)
It is also possible to determine if the sector is protected
in the system by writing a Read Silicon ID command.
P erforming a read operation with A1=VIH, it will produce
a logical "1" at Q0 f or the protected sector.
CHIP UNPROTECT WITH 12V SYSTEM
The MX29F400T/B also features the chip unprotect
mode, so that all sectors are unprotected after chip
unprotect is completed to incorporate any changes in the
code. It is recommended to protect all sectors before
activating chip unprotect mode.
To activate this mode, the programming equipment must
force VID on control pin OE and address pin A9. The CE
pins must be set at VIL. Pins A6 must be set to VIH.(see
Table 2) Refer to chip unprotect algorithm and waveform
for the chip unprotect algorithm. The unprotection
mechanism begins on the falling edge of the WE pulse
and is terminated on the rising edge.
It is also possible to determine if the chip is unprotected
in the system by writing the Read Silicon ID command.
Performing a read operation with A1=VIH, it will produce
00H at data outputs(Q0-Q7) for an unprotected sector. It
is noted that all sectors are unprotected after the chip
unprotect algorithm is completed.
POWER-UP SEQUENCE
The MX29F400T/B powers up in the Read only mode.
In addition, the memory contents may only be altered
after successful completion of the predefined command
sequences.
ABSOLUTE MAXIMUM RATINGS
RATING VALUE
Ambient Operating Temperature -40oC to 125oC
Ambient Temperature with Power -55oC to 125oC
Applied
Storage T emperature -65oC to 125oC
Applied Input Voltage -0.5V to 7.0V
Applied Output Voltage -0.5V to 7.0V
VCC to Ground Potential -0.5V to 7.0V
A9 & OE -0.5V to 13.5V
NOTICE:
Stresses greater than those listed under ABSOLUTE MAXI-
MUM RATINGS may cause permanent damage to the de-
vice. This is a stress rating only and functional operational
sections of this specification is not implied. Exposure to ab-
solute maximum rating conditions for extended period may
affect reliability.
NOTICE:
Specifications contained within the following tables are sub-
ject to change.
SECTOR PROTECTION WITHOUT 12V
The MX29F400T/B also feature a hardware sector
protection method in a system without 12V power suppply.
The programming equipment do not need to supply 12
volts to protect sectors. The details are shown in sector
protect algorithm and waveform.
CHIP UNPROTECT WITHOUT 12V SYSTEM
The MX29F400T/B also feature a hardware chip
unprotection method in a system without 12V power
supply. The programming equipment do not need to
supply 12 volts to unprotect all sectors. The details are
shown in chip unprotect algorithm and waveform.
SYSTEM
17
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
CAPACITANCE TA = 25oC, f = 1.0 MHz
SYMBOL PARAMETER MIN. TYP MAX. UNIT CONDITIONS
CIN1 Input Capacitance 8 pF VIN = 0V
CIN2 Control Pin Capacitance 12 pF VIN = 0V
COUT Output Capacitance 12 pF VOUT = 0V
DC CHARACTERISTICS TA = 0oC to 70oC, -40oC to 125oC, VCC = 5V ±±
±±
±10%
SYMBOL PARAMETER MIN. TYP MAX. UNIT CONDITIONS
IL I Input Leakage Current 1 uA VIN = GND to VCC
ILO Output Leakage Current 10 uA V OUT = GND to VCC
ISB1 Standby VCC current 1 mA CE = VIH
ISB2 1(Note3) 5(Note3) uA CE = VCC ± 0.3V
ICC1 Operating VCC current 40 m A IOUT = 0mA, f=5MHz
ICC2 50 mA IOUT= 0mA, f=10MHz
VIL Input Low Voltage -0.3(NOTE 1) 0.8 V
VIH Input High Voltage(NOTE 2) 2. 0 VCC + 0.3 V
VOL Output Low Voltage 0.45 V IOL = 2.1mA
VOH1 Output High V oltage(TTL) 2.4 V IOH = -2mA
VOH2 Output High Voltage(CMOS) VCC-0.4 V IOH = -100uA,VCC=VCC MIN
NOTES:
1.VIL min. = -1.0V for pulse width is equal to or less than 50 ns.
VIL min. = -2.0V for pulse width is equal to or less than 20 ns.
2.VIH max. = VCC + 1.5V for pulse width is equal to or less than 20 ns
If VIH is over the specified maximum value, read operation cannot be guaranteed.
3.ISB2 20uA max. for Automotive grade.
READ OPERATION
18
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MX29F400T/B
REV. 1.9, APR. 03, 2002
AC CHARACTERISTICS TA = 0oC to 70oC, -40oC to 125oC, VCC = 5V ± ±
± ±
± 10%
29F400T/B-55 (Note2) 29F400T/B-70
SYMBOL PARAMETER MIN. MAX. MIN. MAX. UNIT Conditions
tACC Address to Output Delay 5 5 7 0 ns CE=OE=VIL
tCE CE to Output Delay 5 5 70 ns OE=VIL
tOE OE to Output Delay 1 5 40 ns CE=VIL
tDF OE High to Output Float (Note1) 0 2 0 0 3 0 ns CE=VIL
tO H Address to Output hold 0 0 ns CE=OE=VIL
NOTE:
1. tDF is defined as the time at which the output achieves
the open circuit condition and data is no longer driven.
2.VCC=5V±10%,CL=50pF,VIH/VIL=3.0V/0V,
V OH/V OL=1.5V/1.5V, IOL=2mA,IOH=-2mA.
3. Automotive grade is only provided for MX29F400T/B-
90 & MX29F400T/B-12
TEST CONDITIONS:
• Input pulse levels: 0.45V/2.4V
• Input rise and fall times is equal to or less than 10ns
• Output load: 1 TTL gate + 100pF (Including scope and
jig)
• Reference levels for measuring timing: 0.8V, 2.0V
29F400T/B-90 (Note3) 29F400T/B-12(Note3)
SYMBOL PARAMETER MIN. MAX. MIN. MAX. UNIT Conditions
tACC Address to Output Delay 9 0 1 2 0 n s CE=OE=VIL
tCE CE to Output Delay 9 0 1 2 0 ns OE=VIL
tOE OE to Output Delay 4 0 50 ns CE=VIL
tDF OE High to Output Float (Note1) 0 3 0 0 3 0 ns CE=VIL
tO H Address to Output hold 0 0 ns CE=OE=VIL
19
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MX29F400T/B
REV. 1.9, APR. 03, 2002
READ TIMING WAVEFORMS
Addresses
CE
OE
tACC
WE
VIH
VIL
VIH
VIL
VIH
VIL
VIH
VIL
VOH
VOL
HIGH Z HIGH Z
D ATA V alid
tOE tDF
tCE
Outputs
tOH
ADD V alid
COMMAND PROGRAMMING/DATA PROGRAMMING/ERASE OPERATION
NOTES:
1. VIL min. = -0.6V for pulse width is equal to or less
than 20ns.
2. If VIH is over the specified maximum value, program-
ming operation cannot be guaranteed.
3. ICCES is specified with the device de-selected. If
the device is read during erase suspend mode, cur-
rent draw is the sum of ICCES and ICC1 or ICC2.
4. All current are in RMS unless otherwise noted.
DC CHARACTERISTICS TA = 0oC to 70oC, -40oC to 125oC, VCC = 5V ±±
±±
± 10%
SYMBOL PARAMETER MIN. TYP MAX. UNIT CONDITIONS
ICC1 (Read) Operating VCC Current 40 mA IOUT=0mA, f=5MHz
ICC2 50 mA IOUT=0mA, F=10MHz
ICC3 (Program) 50 mA In Programming
ICC4 (Erase) 50 mA In Erase
ICCES VCC Erase Suspend Current 2 mA CE=VIH, Erase Suspended
20
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
AC CHARACTERISTICS TA = 0oC to 70oC, VCC = 5V ±±
±±
± 10%
29F400T/B-55(Note2) 29F400T/B-70
Symbol PARAMETER MIN. MAX. MIN. MAX. Unit
tOES OE setup time 50 50 ns
tCWC Command programming cycle 70 70 ns
tCEP WE programming pulse width 45 45 ns
tCEPH1 WE programming pluse width High 20 20 ns
tCEPH2 WE programming pluse width High 20 20 ns
tAS Address setup time 0 0 ns
tAH Address hold time 4 5 4 5 ns
tDS Data setup time 3 0 3 0 ns
tDH Data hold time 0 0 ns
tCESC CE setup time before command write 0 0 ns
tDF Output disable time (Note 1) 2 0 30 ns
tAETC Total erase time in auto chip erase 4(TYP.) 32 4(TYP.) 32 s
tAETB Total erase time in auto sector erase 1.3(TYP.) 10.4 1.3(TYP.) 10.4 s
tAVT Total programming time in auto verify 7/12(TYP.) 210/360 7/12(TYP.) 210/360 us
(byte/ word program time)
tBAL Sector address load time 100 1 0 0 us
tCH CE Hold Time 0 0 ns
tCS CE setup to WE going low 0 0 ns
tVLHT Voltge Transition Time 4 4 us
tOESP OE Setup Time to WE Active 4 4 us
tWPP1 Write pulse width for sector protect 1 0 1 0 us
tWPP2 Write pulse width for sector unprotect 1 2 1 2 ms
NOTES:
1. tDF defined as the time at which the output achieves the open circuit condition and data is no longer driven.
2. Under condition of VCC=5V± 10%, CL=50pF,VIH/VIL=3.0V/0V,VOH/VOL=1.5V/1.5V,IOL=2mA,IOH=-2mA.
21
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
AC CHARACTERISTICS TA = 0oC to 70oC, -40oC to 125oC, VCC = 5V ±±
±±
± 10%
29F400T/B-90 29F400T/B-120
Symbol PARAMETER MIN. MAX. MIN. MAX. Unit
tOES OE setup time 50 50 ns
tCWC Command programming cycle 90 120 ns
tCEP WE programming pulse width 45 45 ns
tCEPH1 WE programming pluse width High 20 20 ns
tCEPH2 WE programming pluse width High 20 20 ns
tAS Address setup time 0 0 ns
tAH Address hold time 4 5 5 0 ns
tDS Data setup time 45 5 0 ns
tDH Data hold time 0 0 ns
tCESC CE setup time before command write 0 0 ns
tDF Output disable time (Note 1) 3 0 3 0 ns
tAETC Total erase time in auto chip erase 4(TYP.) 32 4(TYP.) 32 s
tAETB Total erase time in auto sector erase 1.3(TYP.) 10.4 1.3(TYP.) 10.4 s
tAVT Total programming time in auto verify 7/12(TYP.) 210/360 7/12(TYP.) 210/360 us
(byte/ word program time)
tBAL Sector address load time 1 00 1 00 us
tCH CE Hold Time 0 0 ns
tCS CE setup to WE going low 0 0 ns
tVLHT Voltge Transition Time 4 4 us
tOESP OE Setup Time to WE Active 4 4 us
tWPP1 Write pulse width for sector protect 1 0 1 0 us
tWPP2 Write pulse width for sector unprotect 1 2 1 2 ms
NOTES:
1. tDF defined as the time at which the output achieves the open circuit condition and data is no longer driven.
2. Under condition of VCC=5V± 10%, CL=50pF,VIH/VIL=3.0V/0V,VOH/VOL=1.5V/1.5V,IOL=2mA,IOH=-2mA.
22
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
SWITCHING TEST CIRCUITS
SWITCHING TEST WAVEFORMS
COMMAND WRITE TIMING WAVEFORM
Addresses
CE
OE
WE
DIN
tDS
tAH
Data
tDH
tCS tCH
tCWC
tCEPH1
tCEP
tOES
tAS
VCC
5V
VIH
VIL
VIH
VIL
VIH
VIL
VIH
VIL
VIH
VIL
ADD V alid
DEVICE UNDER
TEST
DIODES=IN3064
OR EQUIVALENT
CL 1.2K ohm
1.6K ohm +5V
CL=100pF Including jig capacitance,
CL=50pF for MX29F400T/B-55
2.0V 2.0V
0.8V
0.8V TEST POINTS
2.4V
0.45V
AC TESTING: Inputs are driven at 2.4V for a logic "1" and 0.45V for a logic "0".
Input pulse rise and fall time are < 20ns.(5ns for MX29F400T/B-55)
Note:VIH/VIL=3.0V/0V, VOH/VOL=1.5V/1.5V, for MX29F400T/B-55.
OUTPUT
INPUT
23
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
AUTOMATIC PROGRAMMING TIMING
AUTOMATIC PROGRAMMING TIMING WAVEFORM (WORD MODE)
WAVEFORM
One byte data is programmed. Verify in fast algorithm
and additional programming by external control are not
required because these operations are executed auto-
matically by internal control circuit. Programming
completion can be verified by DATA polling and toggle
bit checking after automatic verification starts. Device
outputs D ATA during programming and D ATA after pro-
gramming on Q7.(Q6 is for toggle bit; see toggle bit,
DATA polling, timing waveform)
tCWC
tAS
tCEP
tDS tDH tDF
Vcc 5V
CE
OE
Q0,Q1,Q2
Q4(Note 1)
WE
A11~A17
tCEPH1
tAH
ADD V alid
tCESC
Q7
Command In
ADD V alid
A0~A10
Command InCommand In Data In DATA
Command In Command InCommand In Data In DATADATA
tAVT
tOE
DATA polling
2AAH
555H 555H
(Q0~Q7)
Command #55H Command #A0H
Notes:
(1). Q6:Toggle bit, Q5:Timing-limit bit, Q3: Time-out bit
Command #AAH
24
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MX29F400T/B
REV. 1.9, APR. 03, 2002
AUTOMATIC PROGRAMMING ALGORITHM FLOWCHART (WORD MODE)
START
Write Data AAH Address 555H
Write Data 55H Address 2AAH
Write Program Data/Address
Write Data A0H Address 555H
YES
NO
Toggle Bit Checking
Q6 not Toggled
Verify Word Ok
YES
Q5 = 1
Reset
Auto Program Completed
Auto Program Exceed
Timing Limit
NO
Invalid
Command
YES
NO .
25
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
All data in chip are erased. External erase verification is
not required because data is erased automatically by
internal control circuit. Erasure completion can be veri-
fied by DATA polling and toggle bit checking after auto-
AUTOMATIC CHIP ERASE TIMING WAVEFORM (WORD MODE)
tCWC
tAS
tCEP
tDS tDH
Vcc 5V
CE
OE
Q0,Q1,
Q4(Note 1)
WE
A11~A17
tCEPH1
tAH
Q7
Command In
A0~A10
Command InCommand In
Command In Command InCommand In
tAETC
DATA polling
2AAH
555H 555H
Command #AAH Command #55H Command #80H
(Q0~Q7)
Notes:
(1). Q6:Toggle bit, Q5:Timing-limit bit, Q3: Time-out bit, Q2: Toggle bit
555H 2AAH 555H
Command In
Command In
Command #AAH
Command In
Command In
Command #55H
Command In
Command In
Command #10H
AUTOMATIC CHIP ERASE TIMING WAVEFORM
matic erase starts. Device outputs 0 during erasure
and 1 after erasure on Q7.(Q6 is for toggle bit; see toggle
bit, D ATA polling, timing waveform)
26
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
AUTOMATIC CHIP ERASE ALGORITHM FLOWCHART (WORD MODE)
START
Write Data AAH Address 555H
Write Data 55H Address 2AAH
Write Data AAH Address 555H
Write Data 80H Address 555H
YES
NO
Toggle Bit Checking
Q6 not Toggled
Write Data 10H Address 555H
Write Data 55H Address 2AAH
Reset
Auto Chip Erase Exceed
Timing Limit
DATA Polling
Q7 = 1 YES
Q5 = 1
Auto Chip Erase Completed
NO
YES
NO
Invalid
Command
27
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
AUTOMATIC SECTOR ERASE TIMING WAVEFORM (WORD MODE)
Sector data indicated by A12 to A17 are erased. Exter-
nal erase verify is not required because data are erased
automatically by internal control circuit. Erasure comple-
tion can be verified by DAT A polling and toggle bit check-
AUTOMATIC SECTOR ERASE TIMING WAVEFORM
ing after automatic erase starts. De vice outputs 0 dur-
ing erasure and 1 after erasure on Q7.(Q6 is for toggle
bit; see toggle bit, D ATA polling, timing wa vef orm)
tAH
Sector
Address0
555H 2AAH 2AAH
555H 555H
Sector
Address1 Sector
Addressn
Vcc 5V
CE
OE
Q0,Q1,
Q4(Note 1)
WE
A12~A17
Q7
A0~A10
Command
In
Command
In Command
In
Command
In Command
In
Command
In Command
In
Command
In Command
In
Command
In Command
In Command
In Command
In
Command
In
Command #30HCommand #30HCommand #30HCommand #55HCommand #AAHCommand #80HCommand #55HCommand #AAH
(Q0~Q7)
Command
In
Command
In
tDH
tDS
tCEP
tCWC
tAETB
tBAL
DATA polling
tCEPH1
tAS
Notes:
(1). Q6:Toggle bit, Q5:Timing-limit bit, Q3: Time-out bit, Q2: Toggle bit
28
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
AUTOMATIC SECTOR ERASE ALGORITHM FLOWCHART (WORD MODE)
START
Write Data AAH Address 555H
Write Data 55H Address 2AAH
Write Data AAH Address 555H
Write Data 80H Address 555H
YES
NO
Toggle Bit Checking
Q6 not Toggled
Write Data 30H Sector Address
Write Data 55H Address 2AAH
Reset
Auto Sector Erase Exceed
Timing Limit
DATA Polling
Q7 = 1
Q5 = 1
Auto Sector Erase Completed
Load Other Sector Addrss If Necessary
(Load Other Sector Address)
YES
NO
Last Sector
to Erase
Time-out Bit
Checking Q3=1 ?
Toggle Bit Checking
Q6 Toggled ? Invalid Command
NO
YES
YES
NO
YES
NO
29
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
ERASE SUSPEND/ERASE RESUME FLOWCHART
START
Write Data B0H
Toggle Bit checking Q6
not toggled
YES
NO
Write Data 30H
Continue Erase
Reading or
Programming End
Read Array or
Program
Another
Erase Suspend ? NO
YES
YES
NO
30
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
TIMING WAVEFORM FOR SECTOR PROTECTION FOR SYSTEM WITH 12V
tOE
Data
OE
WE
12V
5V
12V
5V
CE
A9
A1
A6
tOESP
tWPP 1
tVLHT
tVLHT
tVLHT
Verify
01H F0H
A17-A12 Sector Address
31
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
tOE
Data
OE
WE
12V
5V
12V
5V
CE
A9
A1
tOESP
tWPP 2
tVLHT
tVLHT
tVLHT
Verify
00H
A6
F0H
TIMING WAVEFORM FOR CHIP UNPROTECTION FOR SYSTEM WITH 12V
32
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
SECTOR PROTECTION ALGORITHM FOR SYSTEM WITH 12V
START
Set Up Sector Addr
(A17,A16,A15,A14,A13,A12)
PLSCNT=1
Sector Protection
Complete
Data=01H?
Yes
Yes
OE=VID,A9=VID,CE=VIL
A6=VIL
Activate WE Pulse
Time Out 10us
Set WE=VIH, CE=OE=VIL
A9 should remain VID
Read from Sector
Addr=SA, A1=1
Protect Another
Sector?
Remove VID from A9
Write Reset Command
Device Failed
PLSCNT=32?
Yes
No
No
No
33
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
CHIP UNPROTECTION ALGORITHM FOR SYSTEM WITH 12V
START
Protect All Sectors
PLSCNT=1
Chip Unprotect
Complete
Data=00H?
Yes
Set OE=A9=VID
CE=VIL,A6=1
Activate WE Pulse
Time Out 12ms
Set OE=CE=VIL
A9=VID,A1=1
Set Up First Sector Addr
All sectors have
been verified?
Remove VID from A9
Write Reset Command
Device Failed
PLSCNT=1000?
No
Increment
PLSCNT
No
Read Data from Device
Yes
Yes
No
Increment
Sector Addr
* It is recommended before unprotect whole chip, all sectors should be protected in advance.
34
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
TIMING WAVEFORM FOR SECTOR PROTECTION FOR SYSTEM WITHOUT 12V
tOE
Data
OE
WE
CE
A1
A6
* See the following Note!
Verify
01H
A18-A16 Sector Address
5V
Note1: Must issue "unlock for sector protect/unprotect" command before sector protection
for a system without 12V provided.
Note2: Except F0H
Toggle bit polling
Don't care
(Note 2)
tCEP
F0H
35
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
TIMING WAVEFORM FOR CHIP UNPROTECTION FOR SYSTEM WITHOUT 12V
tOE
Data
WE
CE
A1
Verify
00H
A6
Note1: Must issue "unlock for sector protect/unprotect" command before sector unprotection
for a system without 12V provided.
OE
tCEP
5V
Toggle bit polling
Don't care
(Note 2)
* See the following Note!
F0H
Note2: Except F0H
36
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
SECTOR PROTECTION ALGORITHM FOR SYSTEM WITHOUT 12V
START
Set Up Sector Addr
(A17,A16,A15,A14,A13,A12)
PLSCNT=1
Sector Protection
Complete
Data=01H?
Yes
Yes
OE=VIH,A9=VIH
CE=VIL,A6=VIL
Activate WE Pulse to start
Data don't care
Set CE=OE=VIL
A9=VIH
Read from Sector
Addr=SA, A1=1
Protect Another
Sector?
Write Reset Command
Device Failed
PLSCNT=32?
Yes
No
No
Increment PLSCNT
No
Write "unlock for sector protect/unprotect"
Command(Table1)
Toggle bit checking
Q6 not Toggled No
Yes
37
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
CHIP UNPROTECTION ALGORITHM FOR SYSTEM WITHOUT 12V
START
Protect All Sectors
PLSCNT=1
Chip Unprotect
Complete
Data=00H?
Yes
Set OE=A9=VIH
CE=VIL,A6=1
Activate WE Pulse to start
Data don't care
Set OE=CE=VIL
A9=VIH,A1=1
Set Up First Sector Addr
All sectors have
been verified?
Write Reset Command
Device Failed
PLSCNT=1000?
No
Increment
PLSCNT
No
Read Data from Device
Yes
Yes
No
Increment
Sector Addr
* It is recommended before unprotect whole chip, all sectors should be protected in advance.
Write "unlock for sector protect/unprotect"
Command (Table 1)
Toggle bit checking
Q6 not Toggled
Yes
No
38
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
ID CODE READ TIMING WAVEFORM
tACC
tCE
tACC
tOE
tOH tOH
tDF
DATA OUT
C2H/00C2H 23H/ABH (Byte)
2223H/22ABH (Word)
VID
VIH
VIL
ADD
A9
ADD
A1-A8
A10-A17
CE
OE
WE
ADD
A0
DATA OUT
DATA
Q0-Q15
VCC 5V
VIH
VIL
VIH
VIL
VIH
VIL
VIH
VIL
VIH
VIL
VIH
VIL
39
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
MIN. MAX.
Input Voltage with respect to GND on all pins except I/O pins -1.0V 13.5V
Input Voltage with respect to GND on all I/O pins -1.0V Vcc + 1.0V
Current -100mA +100mA
Includes all pins except Vcc. Test conditions: Vcc = 5.0V, one pin at a time.
LIMITS
PARAMETER MIN. TYP.(2) MAX.(3) UNITS
Sector Erase Time 1.3 10.4 sec
Chip Erase Time 4 3 2 sec
Byte Programming Time 7 2 10 us
Word Programming Time 12 360 us
Chip Programming Time 4 12 sec
Erase/Program Cycles 100,000 Cycles
LATCH-UP CHARACTERISTICS
ERASE AND PROGRAMMING PERFORMANCE(1)
Note: 1.Not 100% Tested, Excludes exter nal system level over head.
2.Typical values measured at 25°C,5V.
3.Maximum values measured at 25°C,4.5V.
PARAMETER MIN. UNIT
Data Retention Time 2 0 Years
DATA RETENTION
40
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
ORDERING INFORMATION
PLASTIC PACKAGE (T op Boot Sector as an sample. For Bottom Boot Sector ones,MX29F400Txx will change
to MX29F400Bxx)
P ART NO. Access Time Operating Current Standby Current Temperature PACKAGE
(ns) MAX.(mA) MAX.(uA) Range
MX29F400TMC-55 55 40 5 0oC~70oC 44 Pin SOP
MX29F400TMC-70 70 40 5 0oC~70oC 44 Pin SOP
MX29F400TMC-90 90 40 5 0oC~70oC 44 Pin SOP
MX29F400TMC-12 120 40 5 0oC~70oC 44 Pin SOP
MX29F400TTC-55 55 40 5 0oC~70oC 48 Pin TSOP
(Normal T ype)
MX29F400TTC-70 70 40 5 0oC~70oC 48 Pin TSOP
(Normal T ype)
MX29F400TTC-90 90 40 5 0oC~70oC 48 Pin TSOP
(Normal T ype)
MX29F400TTC-12 120 40 5 0oC~70oC 48 Pin TSOP
(Normal T ype)
MX29F400TMI-55 55 40 5 -40oC~85oC 44 Pin SOP
MX29F400TMI-70 70 40 5 -40oC~85oC 44 Pin SOP
MX29F400TMI-90 90 40 5 -40oC~85oC 44 Pin SOP
MX29F400TMI-12 120 40 5 -40oC~85oC 44 Pin SOP
MX29F400TTI-55 55 40 5 -40oC~85oC 48 Pin TSOP
(Normal Type)
MX29F400TTI-70 70 40 5 -40oC~85oC 48 Pin TSOP
(Normal Type)
MX29F400TTI-90 90 40 5 -40oC~85oC 48 Pin TSOP
(Normal Type)
MX29F400TTI-12 120 40 5 -40oC~85oC 48 Pin TSOP
(Normal Type)
MX29F400TTA-90 90 40 20 -40oC~125oC 48 Pin TSOP
(Normal T ype)
MX29F400TTA-12 120 40 20 -40oC~125oC 48 Pin TSOP
(Normal T ype)
MX29F400BTA-90 90 40 20 -40oC~125oC 48 Pin TSOP
(Normal T ype)
MX29F400BTA-12 120 40 20 -40oC~125oC 48 Pin TSOP
(Normal T ype)
41
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
P ART NO. Access Operating Current Standby Current T emperature PACKA GE Remark
Time (ns) MAX.(mA) MAX.(uA) Range
MX29F400TTC55G 55 40 5 0oC~70oC 48 Pin TSOP PB free
(Normal T ype)
MX29F400TTC70G 70 40 5 0oC~70oC 48 Pin TSOP PB free
(Normal T ype)
MX29F400TTC90G 90 40 5 0oC~70oC 48 Pin TSOP PB free
(Normal T ype)
MX29F400TTC12G 120 40 5 0oC~70oC 48 Pin TSOP PB free
(Normal T ype)
MX29F400TTI55G 55 40 5 0oC~70oC 48 Pin TSOP PB free
(Normal T ype)
MX29F400TTI70G 70 40 5 0oC~70oC 48 Pin TSOP PB free
(Normal T ype)
MX29F400TTI90G 90 40 5 0oC~70oC 48 Pin TSOP PB free
(Normal T ype)
MX29F400TTI12G 120 40 5 0oC~70oC 48 Pin TSOP PB free
(Normal T ype)
Note:MX29F400T/B-55 is supplied by request
42
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
PACKAGE INFORMATION
48-PIN PLASTIC TSOP
43
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
44-PIN PLASTIC SOP
44
P/N:PM0439
MX29F400T/B
REV. 1.9, APR. 03, 2002
REVISION HISTORY
Revision Description Page Date
1.0 To remove "Advanced Information" datasheet marking and P1 JUL/01/1999
contain information on products in full production.
1. 1 To correct the typing error on package dimension. P4 1 SEP/01/1999
In fact,the physical packages are never changed,just correct the
previously typing error.
1.2 To add the description for 100K endurance cycles P1,P40 SEP/17/1999
To modify timing of sector address loading period while P9
operating multi-sector erase from 80uS to 30uS
To modify tBAL from 80uS to 100uS P20,P21
1. 3 1.Program/erase cycle times:10K cycles-->100K cycles P1,34 DEC/20/1999
2.To add data retention minimum 20 years P1,34
3.To remov e A9 from "timing wa v ef orm f or sector protection f or P3 4
system without 12V"
To remove A9 from "timing w a vef orm f or chip unprotection for P3 5
system without 12V"
1. 4 Add erase suspend ready max. 100us in ERASE SUSPEND's P1 0 MAY/29/2000
section at page10
1. 5 To modify "Package Information" P41~42 JUN/12/2001
1.6 Add automotive grade P16-20,40 NOV/12/2001
1.7 Add MX29F400BTA-90/12 in Ordering Information P40 FEB/04/2002
1.8 Add MX29F400TMI-55/70/90/12 & MX29F400TTI-55/70/90/12 in P40 FEB/19/2002
Ordering Information
1. 9 To added 48-TSOP with PB free package P41 APR/03/2002
MX29F400T/B
MACRONIX INTERNATIONAL CO., LTD.
HEADQUARTERS:
TEL:+886-3-578-6688
FAX:+886-3-563-2888
EUROPE OFFICE:
TEL:+32-2-456-8020
FAX:+32-2-456-8021
JAPAN OFFICE:
TEL:+81-44-246-9100
FAX:+81-44-246-9105
SINGAPORE OFFICE:
TEL:+65-348-8385
FAX:+65-348-8096
T AIPEI OFFICE:
TEL:+886-2-2509-3300
FAX:+886-2-2509-2200
MACRONIX AMERICA, INC.
TEL:+1-408-453-8088
FAX:+1-408-453-8488
CHICAGO OFFICE:
TEL:+1-847-963-1900
FAX:+1-847-963-1909
http : //www.macronix.com
MACRONIX INTERNATIONAL CO., LTD. reserves the right to change product and specifications without notice.
