LHF16KAP View Datasheet(PDF) - Sharp Electronics
Part Name
Description
MFG CO.
'LHF16KAP' PDF : 64 Pages View PDF
sharp
LHF16KAP
Start
Write 60H,
Block Address
Bus
Operation
Write
Command
Comments
Set Block
Lock-Bit Setup
Data=60H
Addr=Block Address
Write 01H,
Block Address
Read
Status Register
Write
Set Block
Lock-Bit Confirm
Data=01H,
Addr=Block Address
Read
Status Register Data
0
SR.7=
1
Full Status
Check if Desired
Set Block Lock-Bit
Complete
Standby
Check SR.7
1=WSM Ready
0=WSM Busy
Repeat for subsequent block lock-bit set operations.
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.
FULL STATUS CHECK PROCEDURE
Read Status Register
Data(See Above)
1
SR.3=
0
VPP Range Error
1
SR.1=
Device Protect Error
0
1
SR.4,5=
0
Command Sequence
Error
SR.4=
1
Set Block Lock-Bit Error
0
Set Block Lock-Bit
Successful
Bus
Operation
Command
Comments
Standby
Standby
Standby
Check SR.3
1=VPP Error Detect
Check SR.1
1=Device Protect Detect
WP#=VIL
Check SR.4,5
Both 1=Command
Sequence Error
Standby
Check SR.4
1=Set Block Lock-Bit 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.
Figure 12. Set Block Lock-Bit Flowchart
28
Rev. 2.0
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