lh28f004su-nc Sharp Microelectronics of the Americas, lh28f004su-nc Datasheet - Page 9

• Manufacturer Part Number: lh28f004su-nc
• Description: 512k Flash Memory
• Manufacturer: Sharp Microelectronics of the Americas

4M (512K × 8) Flash Memory
CSR FULL STATUS CHECK PROCEDURE
READ COMPATIBLE
STATUS REGISTER
CHECK IF DESIRED
CSR FULL STATUS
WRITE 40H or 10H
DATA/ADDRESS
RETRY/ERROR
CLEAR CSRD
OPERATION
READ CSRD
RECOVERY
COMPLETE
(see above)
CSR.4, 5 =
CSR.7 =
CSR.3 =
START
WRITE
1
1
0
1
0
0
Figure 5. Word/Byte Writes with Compatible Status Register
SUCCESSFUL
DATA WRITE
V
DETECT
PP
LOW
Repeat for subsequent Word/Byte Writes.
CSR Full Status Check can be done after each Word/Byte
Write, or after a sequence of Word/Byte Writes.
Write FFH after the last operation to reset device
to read array mode.
See Command Bus Cycle notes for description of codes.
CSR.3, 4, 5 should be cleared, if set, before further attempts
are initiated.
OPERATION
OPERATION
Standby
Standby
Standby
Write
Write
Read
BUS
BUS
COMMAND
Word/Byte
COMMAND
Write
D = 40H or 10H
A = X
D = WD
A = WA
Q = CSRD
Toggle CE or OE
to update CSRD.
A = X
Check CSR.7
1 = WSM Ready
0 = WSM Busy
Check CSR.4, 5
1 = Data Write Unsuccessful
0 = Data Write Successful
Check CSR.3
1 = V
0 = V
PP
PP
Low Detect
OK
COMMENTS
COMMENTS
LH28F004SU-NC
28F004SUT-NC80-4
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