lh28f400su-nc Sharp Microelectronics of the Americas, lh28f400su-nc Datasheet - Page 13

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

4M (512K × 8, 256K × 16) Flash Memory
OPERATION COMPLETE
READ COMPATIBLE
READ COMPATIBLE
READ COMPATIBLE
STATUS REGISTER
STATUS REGISTER
STATUS REGISTER
BLOCK ADDRESS
WRITE D0H AND
WRITE 77H
RESET WP
CSR.4, 5 =
ANOTHER
CSR.7 =
CSR.7 =
CSR.7 =
SET WP
BLOCK?
START
LOCK
NO
1
1
1
0
YES
0
0
1
0
(NOTE)
Figure 9. Block Locking Scheme
OPERATION
NOTE:
See CSR Full Status Check for Data-Write operation.
If CSR.4, 5 is set, as it is command sequence error,
should be cleared before further attempts are initiated.
Write FFH after the last operation to reset device to read
array mode.
See Command Bus Definitions for description of codes.
Read
Write
Read
Write
Write
Read
Write
BUS
Write Protect
Write Protect
COMMAND
Lock Block
Confirm
Reset
Set
Q = CSRD
Toggle CE or OE
to update CSRD.
1 = WSM Ready
0 = WSM Busy
After Write D = 47H A = X,
Write D = D0H A = 0FFH
Q = CSRD
Toggle CE or OE
to update CSRD.
1 = WSM Ready
0 = WSM Busy
D = 77H
A = X
D = D0H
A = BA
Q = CSRD
Toggle CE or OE
to update CSRD.
1 = WSM Ready
0 = WSM Busy
After Write D = 57H A = X,
Write D = D0H A = 0FFH
COMMENTS
LH28F400SU-NC
28F400SUT-NC60-7
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