M29W400 ST Microelectronics, M29W400 Datasheet - Page 8

• Manufacturer Part Number: M29W400
• Description: 4 Mbit 512Kb x8 or 256Kb x16 / Boot Block Low Voltage Single Supply Flash Memory
• Manufacturer: ST Microelectronics

M29W400T, M29W400B
Table 4. User Bus Operations
Notes: 1. X = V
Table 6. Read Block Protection with AS Instruction
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Table 5. Read Electronic Signature (following AS instruction or with A9 = V
Read Word
Read Byte
Write Word
Write Byte
Output Disable
Standby
Reset
Block
Protection
Blocks
Unprotection
Block
Protection
Verify
Block
Unprotection
Verify
Block
Temporary
Unprotection
Protected Block
Unprotected Block
Word-
Byte-
Org.
wide
wide
Operation
(2 ,4)
(2 ,4)
2. Block Address must be given on A12-A17 bits.
3. See Table 6.
4. Operation performed on programming equipment.
Code
Manufact.
Manufact.
(2,4)
Device
Device
Code
Code
Code
Code
Code
(4)
IL
or V
V
V
V
V
V
V
V
V
V
V
E
X
X
IH
IL
ID
IH
IL
IL
IL
IL
IL
IL
IL
M29W400T
M29W400B
M29W400T
M29W400B
Device
V
V
V
V
V
V
V
V
V
G
X
X
X
IL
IL
IH
IH
IH
ID
ID
IL
IL
V
V
E
IL
IL
V
V
IL
IL
V
V
V
V
V
V
V
W
Pulse
Pulse
X
X
X
IH
IH
IH
IH
IH
IL
IL
V
V
V
V
V
V
V
V
G
E
IL
IL
IL
IL
IL
IL
IL
IL
(1)
RP
V
V
V
V
V
V
V
V
V
V
V
V
IH
IH
IH
IH
IH
IH
IL
IH
IH
IH
IH
ID
V
V
V
V
V
V
G
IL
IL
IL
IL
IL
IL
BYTE
V
V
W
V
V
V
V
X
X
X
X
X
X
X
X
IH
IH
IH
IH
IL
IL
V
V
V
V
V
V
W
IH
IH
IH
IH
IH
IH
A0
A0
A0
A0
A0
V
V
X
X
X
X
X
X
IL
IL
A0
V
V
BYTE
IL
IL
V
V
V
V
V
V
IH
IH
IH
IL
IL
IL
A1
A1
A1
A1
A1
V
V
X
X
X
X
X
X
IH
IH
V
V
V
V
V
V
A0
V
V
A1
A6
V
A6
A6
A6
A6
V
X
X
X
X
X
X
IH
IH
IH
IH
IH
IL
IL
IH
IH
IL
V
V
V
V
A9
A9
A9
A9
A9
V
A1
V
V
V
V
V
X
X
X
X
ID
ID
ID
ID
IL
IL
IL
IL
IL
IL
Block Address
Block Address
A12-A17
A12
A12
A12
A12
A12
A12
A12
V
Addresses
X
X
X
X
X
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
IH
Other
A15
A15
A15
A15
A15
A15
A15
V
X
X
X
X
X
IH
Data Input Data Input
Address
Address
Output
DQ15
Data
Input
Input
Hi-Z
Hi-Z
Hi-Z
A–1
DQ15
Addresses
Don’t
Don’t
Don’t
ID
Care
Care
Care
Don’t Care
Don’t Care
X
X
X
X
X
A–1
)
0
0
0
Other
Output
DQ14
DQ8-
DQ14
DQ8-
Data
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
00h
00h
00h
X
X
X
X
X
DQ0-DQ7
DQ0-DQ7
01h
00h
Status
Status
Output
Output
Protect
Protect
DQ0-
DQ7
Block
Block
EEh
EEh
Input
Input
EFh
EFh
Data
Data
Data
Data
20h
20h
Hi-Z
Hi-Z
Hi-Z
X
X
X
(3)
(3)