256Mb: 3V Embedded Parallel NOR Flash
Registers
Figure 21: Status Register Polling Flowchart
Start
Read 1
Yes
Yes
Yes
Read 2
Read 3
PROGRAM operation
No
Read 3 correct data?
No
DQ7 = Valid data
No
PROGRAM operation
failure
Yes
Read 2
Read 3
DQ5 = 1
No
Yes
Yes
DQ6 = Toggling
Device error
Read2.DQ6 = Read3.DQ6
No
Yes
DQ2 = Toggling
Read2.DQ2 = Read3.DQ2
DQ6 = Toggling
Timeout failure
Erase/suspend mode
Read1.DQ6 = Read2.DQ6
No
No
ERASE operation
complete
PROGRAM operation
complete
Device busy: Repolling
WRITE TO BUFFER
Yes
Yes
WRITE TO BUFFER
PROGRAM
DQ1 = 1
No
PROGRAM
abort
No
Device busy: Repolling
PDF: 09005aef84bd3b68
m29w_256mb.pdf - Rev. B 5/13 EN
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