M29W640FB STMICROELECTRONICS [STMicroelectronics], M29W640FB Datasheet - Page 32

• Manufacturer Part Number: M29W640FB
• Description: 64 Mbit (8Mb x8 or 4Mb x16, Page, Boot Block) 3V Supply Flash Memory
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

5 Status Register
Table 8.
1. Unspecified data bits should be ignored.
Figure 4.
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Program
Program During Erase
Suspend
Program Error
Chip Erase
Block Erase before
timeout
Block Erase
Erase Suspend
Erase Error
Operation
Data Polling Flowchart
Status Register Bits
Faulty Block Address
Good Block Address
Non-Erasing Block
Non-Erasing Block
Non-Erasing Block
Erasing Block
Erasing Block
Erasing Block
Any Address
Any Address
Any Address
Any Address
Address
at VALID ADDRESS
at VALID ADDRESS
NO
READ DQ5 & DQ7
READ DQ7
START
DATA
DATA
DQ7
DQ7
DQ7
DQ7
DQ7
DQ5
DQ7
FAIL
= 1
=
=
0
0
0
0
0
1
0
0
YES
NO
NO
YES
YES
No Toggle
Toggle
Toggle
Toggle
Toggle
Toggle
Toggle
Toggle
Toggle
Toggle
Toggle
DQ6
Data read as normal
PASS
AI90194
DQ5
0
0
0
0
0
0
0
1
0
1
1
M29W640FT, M29W640FB
DQ3
–
–
1
0
0
1
1
–
1
–
1
No Toggle
No Toggle
No Toggle
Toggle
Toggle
Toggle
Toggle
Toggle
DQ2
–
–
–
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
RB
0
0
0
0
0
0
0