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LHF16KS1
23
Start
Write 70H
Read Status
Bus
Operation
Write
Read
Command
Read Status
Register
Comments
Data=70H
Addr=X
Status Register Data
Register
Check SR.7
Standby
1=WSM Ready
SR.7=
0
0=WSM Busy
1
Write 40H or 10H,
Address
Write
Write
Setup Word/Byte
Write
Word/Byte Write
Data=40H or 10H
Addr=Location to Be Written
Data=Data to Be Written
Addr=Location to Be Written
Write Word/Byte
Data and Address
Read
Status Register Data
Read
Status Register
No
Suspend Word/Byte
Write Loop
Standby
Check SR.7
1=WSM Ready
0=WSM Busy
SR.7=
0
Suspend
Word/Byte
Write
Yes
Repeat for subsequent word/byte writes.
SR full status check can be done after each word/byte write, or after a sequence of
word/byte writes.
1
Full Status
Check if Desired
Word/byte Write
Complete
FULL STATUS CHECK PROCEDURE
Write FFH after the last word/byte write operation to place device in
read array mode.
Read Status Register
Data(See Above)
Bus
Operation
Command
Comments
SR.3=
1
V PP Range Error
Standby
Check SR.3
1=V PP Error Detect
0
1
Standby
Check SR.1
1=Device Protect Detect
WP#=V IL ,Block Lock-Bit is Set
Only required for systems
SR.1=
0
Device Protect Error
Standby
implementing lock-bit configuration
Check SR.4
1=Data Write Error
SR.4=
0
Word/Byte Write
1
Word/byte Write Error
SR.4,SR.3 and SR.1 are only cleared by the Clear Status Register
command in cases where multiple locations are written before
full status is checked.
If error is detected, clear the Status Register before attempting
retry or other error recovery.
Successful
Figure 7. Automated Word/byte Write Flowchart
Rev. 2.0
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