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LHF08CTE
17
Start
Write 20H,
Block Address
Write D0H,
Bus
Operation
Write
Write
Command
Erase Setup
Erase
Confirm
Comments
Data=20H
Addr=Within Block to be Erased
Data=D0H
Addr=Within Block to be Erased
Block Address
Read Status
Read
Status Register Data
Register
No
Suspend Block
Erase Loop
Standby
Check SR.7
1=WSM Ready
0=WSM Busy
SR.7=
0
Suspend
Block Erase
Yes
Repeat for subsequent block erasures.
Full status check can be done after each block erase or after a sequence of
1
block erasures.
Write FFH after the last operation to place device in read array mode.
Full Status
Check if Desired
Block Erase
Complete
FULL STATUS CHECK PROCEDURE
Read Status Register
Data(See Above)
Bus
Operation
Standby
Command
Comments
Check SR.3
1=V PP Error Detect
1
SR.3=
0
V PP Range Error
Standby
Check SR.1
1=Device Protect Detect
RP#=V IH ,Block Lock-Bit is Set
Only required for systems
implementing lock-bit configuration
1
SR.1=
Device Protect Error
Standby
Check SR.4,5
Both 1=Command Sequence Error
0
Standby
Check SR.5
1=Block Erase Error
SR.4,5=
1
Command Sequence
Error
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
0
SR.5=
1
Block Erase Error
before full status is checked.
If error is detected, clear the Status Register before attempting
retry or other error recovery.
0
Block Erase Successful
Figure 5. Automated Block Erase Flowchart
Rev. 1.3
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