W28V400B Datasheet, PDF (20/48 Pages) Winbond – 4M(512K x 8/256K x 16) SMARTVOLTAGE FLASH MEMORY

W28V400B/T
Start
Write B0H
Read
Read Array Data
Read Status
Register
SR.7=
0
1
0
SR.6=
1
Block Erase
Complete
Read or
Word/Byte
Write?
No
Word/Byte write
Wore/Byte Write Loop
Done?
Yes
Write D0H
Write FFH
Block Erase
Resumed
Read Array Data
Bus Operation
Write
Command
Erase
Suspend
Read
Standby
Standby
Write
Erase
Resume
Comments
Data = B0H
Addr = X
Status Register Data
Addr = X
Check SR.7
1 = WSM Ready
0 = WSM Busy
Check SR.6
1 = Block Erase
Suspended
0 = Block Erase
Completed
Data = D0H
Addr = X
Figure 7. Block Erase Suspend/Resume Flowchart
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