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LHF16KS1
28
Start
Write 60H,
Block Address
Write 01H,
Block Address
Bus
Operation
Write
Write
Command
Set Block
Lock-Bit Setup
Set Block
Lock-Bit Confirm
Comments
Data=60H
Addr=Block Address
Data=01H,
Addr=Block Address
Read
Status Register
Read
Status Register Data
SR.7=
0
Standby
Check SR.7
1=WSM Ready
0=WSM Busy
1
Repeat for subsequent block lock-bit set operations.
Full Status
Check if Desired
Full status check can be done after each block lock-bit set operation
or after a sequence of block lock-bit set operations.
Write FFH after the last block lock-bit set operation to place device in
read array mode.
Set Block Lock-Bit
Complete
FULL STATUS CHECK PROCEDURE
Read Status Register
Data(See Above)
SR.3=
1
V PP Range Error
Bus
Operation
Standby
Command
Comments
Check SR.3
1=V PP Error Detect
Check SR.1
0
1
Standby
1=Device Protect Detect
WP#=V IL
Check SR.4,5
SR.1=
Device Protect Error
Standby
Both 1=Command
Sequence Error
0
Standby
Check SR.4
1=Set Block Lock-Bit Error
SR.4,5=
0
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 block lock-bits are set before
full status is checked.
If error is detected, clear the Status Register before attempting
retry or other error recovery.
1
SR.4=
Set Block Lock-Bit Error
0
Set Block Lock-Bit
Successful
Figure 12. Set Block Lock-Bit Flowchart
Rev. 2.0
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