MT28F642D18 Datasheet, PDF (26/51 Pages) Micron Technology – FLASH MEMORY

Figure 9
CHECK BLOCK ERASE Flowchart
Start
Issue ERASE SETUP
Command and
Block Address
Issue CHECK BLOCK
ERASE CONFIRM
Command and
Block Address
ADVANCE
4 MEG x 16
ASYNC/PAGE/BURST FLASH MEMORY
BUS
OPERATION COMMAND COMMENTS
WRITE
ERASE
SETUP
Data = 20h
Block Addr = Address
within block to be
checked
WRITE
CHECK
BLOCK
ERASE
CONFIRM
Data = D1h
Block Addr = Address
within block to be
checked
READ
Status register data
Toggle OE# or CE# to
update status register
Standby
Check SR7 and SR5
NO
SR7 = 1?
YES
NO
SR5 = 0?
YES
BLOCK ERASE
Complete
Error
4 Meg x 16 Async/Page/Burst Flash Memory
MT28F642D18_3.p65 – Rev. 3, Pub. 8/02
26
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©2002, Micron Technology, Inc.