lh28f004su-nc Sharp Microelectronics of the Americas, lh28f004su-nc Datasheet - Page 15

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

4M (512K × 8) Flash Memory
READ COMPATIBLE
CHECK IF DESIRED
STATUS REGISTER
CSR FULL STATUS
CSR FULL STATUS CHECK PROCEDURE
RETRY/ERROR
CLEAR CSRD
OPERATION
READ CSRD
WRITE D0H
COMPLETE
RECOVERY
WRITE A7H
(see above)
CSR.4, 5 =
CSR.3 =
CSR.7 =
(NOTE)
(NOTE)
START
1
0
1
Figure 11. Erase All Unlocked Blocks with Compatible Status Registers
1
0
0
SUCCESSFUL
SUSPEND
ERASE
V
DETECT
ERASE
PP
NO
LOW
ERASE LOOP
SUSPEND
YES
CSR Full Status Check can be done after Erase All Unlocked
Block, or after a sequence of Erasures.
Write FFH after the last operation to reset
device to read array mode.
See Command Bus Cycle notes for description of codes.
NOTE:
Where power off or RP is set low during erase operation,
1. Clear CSR.3/4/5 and issue Reset WP command.
2. Retry Erase All Unlocked Block Erase command to
3. Set WP command is issued, if necessary.
CSR.3, 4, 5 should be cleared, if set, before further attempts
are initiated.
NOTE:
If CSR.3 (VPPS) is set to '1', after clearing CSR.3/4/5,
1. Issue Reset WP command,
2. Retry Erase All Unlocked Block Erase command to erase
3. Set WP command is issued, if necessary.
If CSR.3 (VPPS) is set to '0', after clearing CSR.3/4/5,
1. Retry Erase All Unlocked Block Erase command.
OPERATION
OPERATION
erase all blocks, or issue Single Block Erase to
erase all of the unlocked blocks in sequence.
all blocks, or issue Single Block Erase to erase all of the
unlocked blocks in sequence.
Standby
Standby
Standby
Write
Write
Read
BUS
BUS
COMMAND
COMMAND
Unlocked
Erase All
Confirm
Blocks
D = A7H
A = X
D = D0H
A = X
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
Low Detect
OK
COMMENTS
LH28F004SU-NC
28F004SUC80-10
15