M29W320ET Datasheet, PDF (20/46 Pages) STMicroelectronics – 32 Mbit (4Mb x8 or 2Mb x16, Boot Block) 3V Supply Flash Memory

M29W320ET, M29W320EB
Table 7. Status Register Bits
Operation
Address
DQ7
DQ6
DQ5
DQ3
DQ2
RB
Program
Any Address
DQ7
Toggle
0
–
–
0
Program During Erase
Suspend
Any Address
DQ7
Toggle
0
–
–
0
Program Error
Any Address
DQ7
Toggle
1
–
–
Hi-Z
Chip Erase
Any Address
0
Toggle
0
1
Toggle
0
Block Erase before
timeout
Erasing Block
0
Toggle
0
Non-Erasing Block
0
Toggle
0
0
Toggle
0
0
No Toggle
0
Block Erase
Erasing Block
0
Toggle
0
Non-Erasing Block
0
Toggle
0
1
Toggle
0
1
No Toggle
0
Erase Suspend
Erasing Block
Non-Erasing Block
1
No Toggle
0
–
Data read as normal
Toggle
Hi-Z
Hi-Z
Erase Error
Good Block Address
0
Toggle
1
Faulty Block Address
0
Toggle
1
Note: Unspecified data bits should be ignored.
1
No Toggle Hi-Z
1
Toggle
Hi-Z
Figure 7. Data Polling Flowchart
Figure 8. Toggle Flowchart
START
READ DQ5 & DQ7
at VALID ADDRESS
DQ7
=
YES
DATA
NO
NO _DQ5
=1
YES
READ DQ7
at VALID ADDRESS
DQ7
=
YES
DATA
NO
FAIL
PASS
AI90194
START
READ DQ6
ADDRESS = BA
READ
DQ5 & DQ6
ADDRESS = BA
DQ= 6
NO
TOGGLE
YES
NO _DQ5
=1
YES
READ DQ6
TWICE
ADDRESS = BA
DQ= 6
NO
TOGGLE
YES
FAIL
PASS
AI08929b
Note: BA = Address of Block being Programmed or Erased.
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