LHF80V25
17
sharp
Start
Bus
Command
Comments
Operation
Data=40H or 10H
Write
Write
Write 40H or 10H,
Address
Setup Word/Byte Write
Word/Byte Write
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
Check SR.7
Suspend Word/Byte
Write Loop
Standby
1=WSM Ready
0=WSM Busy
No
0
Suspend
Word/Byte Write
Repeat for subsequent byte writes.
SR.7=
Yes
SR full status check can be done after each Word/Byte write, or after a sequence of
Word/Byte writes.
1
Write FFH after the last Word/Byte write operation to place device in
read array mode.
Full Status
Check if Desired
Word/Byte Write
Complete
FULL STATUS CHECK PROCEDURE
Read Status Register
Data(See Above)
Bus
Command
Comments
Operation
Check SR.3
Standby
1=V Error Detect
PP
1
SR.3=
V
Range Error
PP
Check SR.1
Standby
Standby
1=Device Protect Detect
0
Check SR.4
1=Data Write Error
1
Device Protect Error
SR.1=
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.
0
If error is detected, clear the Status Register before attempting
retry or other error recovery.
1
SR.4=
Word/Byte Write Error
0
Word/Byte Write
Successful
Figure 6. Automated Word/Byte Write Flowchart
Rev. 1.1
ETC [ ETC ]
