256Mb: 3V Embedded Parallel NOR Flash
Registers
Figure 19: Data Polling Flowchart
Start
Read DQ7, DQ5, and DQ1
at valid address1
Yes
DQ7 = Data
No
No
No
DQ5 = 1
Yes
DQ1 = 1
Yes
Read DQ7 at valid address
Yes
DQ7 = Data
No
Failure2
Success
1. Valid address is the address being programmed or an address within the block being
erased.
Notes:
2. Failure results: DQ5 = 1 indicates an operation error; DQ1 = 1 indicates a WRITE TO BUF-
FER PROGRAM ABORT operation.
PDF: 09005aef84bd3b68
m29w_256mb.pdf - Rev. B 5/13 EN
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