LRS1338A View Datasheet(PDF) - Sharp Electronics
Part Name
Description
MFG CO.
'LRS1338A' PDF : 36 Pages View PDF
Stacked Chip (8M Flash & 2M SRAM)
LRS1338A
Start
Write 40H or 10L
Address
Write Word
Data and Address
Read
Status Register
SR.7 = 0
1
Full Status
Check If Desired
Word Write
Complete
Suspend Word
No Write Loop
Suspend Yes
Word
Write
BUS
OPERATION
COMMAND
COMMENTS
Write
Write
Read
Setup Data = 40H or 10H
Word Write Addr = Location to be Written
Word
Write
Data = Data to be Written
Addr = Location to be Written
Status Register Data
Standby
Check SR.7
1 = WSM Ready
0 = WSM Busy
Repeat for subsequent byte writes.
SR full status check can be done after each byte write
or after a sequence of byte writes.
Write FFH after the last byte write operation to place
device in read array mode.
FULL STATUS CHECK PROCEDURE
Read Status Register
Data (See Above)
1
SR.3 =
0
1
SR.1 =
0
1
SR.4 =
VPP
Range Error
Device
Protect Error
Word Write
Error
BUS
OPERATION
COMMAND
COMMENTS
Standby
Standby
Check SR.3
1 = VPP Error Detect
Check SR.1
1 = Device Protect Detect
Standby
Check SR.4
1 = Data 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.
0
Word Write
Successful
Figure 7. Automated Word Write Flowchart
LRS1338A-7
Data Sheet
15
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