LH28F400SUE-NC80 Sharp Electronics, LH28F400SUE-NC80 Datasheet - Page 11

• Manufacturer Part Number: LH28F400SUE-NC80
• Manufacturer: Sharp Electronics

Specifications of LH28F400SUE-NC80

• Cell Type: NOR
• Density: 4Mb
• Access Time (max): 80ns
• Interface Type: Parallel
• Boot Type: Not Required
• Address Bus: 19/18Bit
• Operating Supply Voltage (typ): 5V
• Operating Temp Range: 0C to 70C
• Package Type: TSOP-I
• Program/erase Volt (typ): 4.5 to 5.5V
• Sync/async: Asynchronous
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Word Size: 8/16Bit
• Number Of Words: 512K/256K
• Supply Current: 60mA
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / Rohs Status: Not Compliant

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
(NOTE)
1
1
0
0
0
1
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.
NOTE:
If CSR.3 (VPPS) is set to '1', after clearing CSR.3/4/5,
1. Issue Reset WP command.
2. Retry Single Block Erase command.
3. Set WP command is issued, if necessary.
If CSR.3 (VPPS) is set to '0', after clearing CSR.3/4/5,
1. Retry Single Block Erase command.
If power is off or RP is low during erase operation,
1. Clear CSR.3/4/5 and issue Reset WP command,
2. Retry Single Block Erase command.
3. Set WP command is issued, if necessary.
OPERATION
OPERATION
Standby
Standby
Standby
Write
Write
Read
BUS
BUS
Block Erase
COMMAND
COMMAND
Confirm
Check CSR.7
1 = WSM Ready
0 = WSM Busy
D = 20H
A = X
D = D0H
A = BA
Q = CSRD
Toggle CE or OE
to update CSRD.
A = X
Check CSR.4, 5
1 = Erase Error
0 = Erase Successful
Both 1 = Command
Sequence Error
Check CSR.3
1 = V
0 = V
PP
PP
Low Detect
OK
COMMENTS
COMMENTS
LH28F400SU-NC
28F400SUT-NC60-5
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