M29W400BT STMICROELECTRONICS [STMicroelectronics], M29W400BT Datasheet - Page 7

• Manufacturer Part Number: M29W400BT
• Description: 4 Mbit 512Kb x8 or 256Kb x16, Boot Block Low Voltage Single Supply Flash Memory
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Table 7. Commands, 16-bit mode, BYTE = V
Table 8. Commands, 8-bit mode, BYTE = V
Note: X Don’t Care, PA Program Address, PD Program Data, BA Any address in the Block.
All values in the table are in hexadecimal.
The Command Interface only uses A–1, A0-A10 and DQ0-DQ7 to verify the commands; A11-A17, DQ8-DQ14 and DQ15 are Don’t Care.
DQ15A–1 is A–1 when BYTE is V
Read/Reset. After a Read/Reset command, read the memory as normal until another command is issued.
Auto Select. After an Auto Select command, read Manufacturer ID, Device ID or Block Protection Status.
Program, Unlock Bypass Program, Chip Erase, Block Erase. After these commands read the Status Register until the Program/Erase
Controller completes and the memory returns to Read Mode. Add additional Blocks during Block Erase Command with additional Bus Writ e
Operations until Timeout Bit is set.
Unlock Bypass. After the Unlock Bypass command issue Unlock Bypass Program or Unlock Bypass Reset commands.
Unlock Bypass Reset. After the Unlock Bypass Reset command read the memory as normal until another command is issued.
Erase Suspend. After the Erase Suspend command read non-erasing memory blocks as normal, issue Auto Select and Program commands
on non-erasing blocks as normal.
Erase Resume. After the Erase Resume command the suspended Erase operation resumes, read the Status Register until the Program/
Erase Controller completes and the memory returns to Read Mode.
Read/Reset
Auto Select
Program
Unlock Bypass
Unlock Bypass
Program
Unlock Bypass Reset
Chip Erase
Block Erase
Erase Suspend
Erase Resume
Read/Reset
Auto Select
Program
Unlock Bypass
Unlock Bypass
Program
Unlock Bypass Reset
Chip Erase
Block Erase
Erase Suspend
Erase Resume
Command
Command
6+
6+
1
3
3
4
3
2
2
6
1
1
1
3
3
4
3
2
2
6
1
1
IL
or DQ15 when BYTE is V
Addr Data
Addr Data
AAA
AAA
AAA
AAA
AAA
AAA
555
555
555
555
555
555
X
X
X
X
X
X
X
X
X
X
1st
1st
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
F0
A0
90
B0
30
F0
A0
90
B0
30
Addr
Addr
2AA
2AA
2AA
2AA
2AA
2AA
555
555
555
555
555
555
PA
PA
X
X
2nd
2nd
IL
IH
IH
Data
Data
.
PD
PD
55
55
55
55
00
55
55
55
55
55
55
00
55
55
Addr
Addr
AAA
AAA
AAA
AAA
AAA
555
555
555
555
555
X
X
Bus Write Operations
Bus Write Operations
3rd
3rd
Data
Data
A0
A0
F0
F0
90
20
80
80
90
20
80
80
Addr
Addr
AAA
AAA
555
555
PA
PA
4th
4th
M29W400BT, M29W400BB
Data
Data
PD
AA
AA
PD
AA
AA
Addr
Addr
2AA
2AA
555
555
5th
5th
Data Addr
Data Addr
55
55
55
55
AAA
555
BA
BA
6th
6th
Data
Data
10
30
10
30
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