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LHF32KZM
23
Start
Write 70H
Read Status
Register
Bus
Operation
Write
Read
Command
Read Status
Register
Comments
Data=70H
Addr=X
Status Register Data
Check SR.7
SR.7=
0
Standby
1=WSM Ready
0=WSM Busy
1
Write 30H
Write D0H
Read Status
Register
Write
Write
Read
Standby
Full Chip Erase
Setup
Full Chip Erase
Confirm
Data=30H
Addr=X
Data=D0H
Addr=X
Status Register Data
Check SR.7
1=WSM Ready
0=WSM Busy
SR.7=
0
Full status check can be done after each full chip erase.
Write FFH after the last operation to place device in read array mode.
1
Full Status
Check if Desired
Full Chip Erase
Complete
FULL STATUS CHECK PROCEDURE
Read Status Register
Data(See Above)
Bus
Operation
Command
Comments
SR.3=
0
SR.4,5=
1
1
V PP Range Error
Command Sequence
Error
Standby
Standby
Standby
Check SR.3
1=V PP Error Detect
Check SR.4,5
Both 1=Command Sequence Error
Check SR.5
1=Full Chip Erase Error
0
SR.5,SR.4,SR.3 and SR.1 are only cleared by the Clear Status
Register Command in cases where multiple blocks are erased
before full status is checked.
SR.5=
1
Full Chip Erase Error
If error is detected, clear the Status Register before attempting
retry or other error recovery.
0
Full Chip Erase
Successful
Figure 6. Automated Full Chip Erase Flowchart
Rev. 1.6
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