lh28f400su-lc Sharp Microelectronics of the Americas, lh28f400su-lc Datasheet - Page 11

• Manufacturer Part Number: lh28f400su-lc
• Description: 512k 256k Flash Memory
• Manufacturer: Sharp Microelectronics of the Americas

4M (512K × 8, 256K × 16) Flash Memory
CSR FULL STATUS CHECK PROCEDURE
READ COMPATIBLE
STATUS REGISTER
CHECK IF DESIRED
CSR FULL STATUS
BLOCK ADDRESS
WRITE D0H AND
RETRY/ERROR
CLEAR CSRD
OPERATION
READ CSRD
COMPLETE
WRITE 20H
RECOVERY
(see above)
CSR.4, 5 =
CSR.7 =
CSR.3 =
START
1
1
0
0
1
0
SUCCESSFUL
SUSPEND
Figure 7. Block Erase with Compatible Status Register
ERASE
V
DETECT
ERASE
PP
NO
LOW
ERASE LOOP
SUSPEND
YES
Repeat for subsequent Block Erasures.
CSR Full Status Check can be done after each Block Erase,
or after a sequence of Block Erasures.
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
Read
Write
Write
BUS
BUS
Block Erase
COMMAND
COMMAND
Confirm
D = 20H
A = X
D = D0H
A = BA
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 = Erase Error
0 = Erase Successful
Both 1 = Command
Sequence Error
Check CSR.3
1 = V
0 = V
PP
PP
COMMENTS
COMMENTS
Low Detect
OK
LH28F400SU-LC
28F400SUH-LC15-5
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