LH28F008SAT-12 Sharp Electronics, LH28F008SAT-12 Datasheet - Page 13

• Manufacturer Part Number: LH28F008SAT-12
• Manufacturer: Sharp Electronics

Specifications of LH28F008SAT-12

• Cell Type: NOR
• Density: 8Mb
• Access Time (max): 120ns
• Interface Type: Parallel
• Boot Type: Not Required
• Address Bus: 20b
• Operating Supply Voltage (typ): 5V
• Operating Temp Range: 0C to 70C
• Package Type: TSOP
• Program/erase Volt (typ): 11.4 to 12.6V
• Sync/async: Asynchronous
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Word Size: 8b
• Number Of Words: 1M
• Supply Current: 50mA
• Mounting: Surface Mount
• Pin Count: 40
• Lead Free Status / Rohs Status: Not Compliant

8M (1M × 8) Flash Memory
FULL STATUS CHECK PROCEDURE
STATUS REGISTER
SUCCESSFUL
BYTE WRITE
DATA READ
(see above)
SR.3 = 0
SR.4 = 0
CHECK IF DESIRED
WRITE 40H (10H),
?
?
ADDRESS/DATA
BYTE ADDRESS
YES
YES
FULL STATUS
COMPLETED
WRITE BYTE
BYTE WRITE
READY?
START
WSM
NO
NO
YES
BYTE WRITE
V
NO
PP
ERROR
ERROR
RANGE
Figure 5. Automated Byte Write Flowchart
Repeat for subsequent bytes.
Full status check can be done after each byte or after a
sequence of bytes.
Write FFH after the last byte write operation to reset the
device to Read Array Mode.
SR.3 must be cleared, if set during a byte write attempt,
before further attempts are allowed by the Write State
Machine.
SR.4 is only cleared by the Clear Status Register Command,
in cases where multiple bytes are written before full status is
checked.
If error is detected, clear the Status Register before
attempting retry or other error recovery.
Standby/Read
OPERATION
OPERATION
Optional
Standby
Standby
Read
Write
Write
BUS
BUS
COMMAND
COMMAND
Byte Write
Byte Write
Setup
Data = 40H (10H)
Addr = Byte to be written
Data to be written
Addr = Byte to be written
Check RY/BY
V
Read Status Register
Check SR.7
1 = Ready, 0 = Busy
Toggle OE or CE to update
Status Register
CPU may already have read
Status Register data in WSM
Ready polling above
Check SR.3
1 = V
Check SR.4
1 = Byte Write Error
OH
= Ready, V
PP
COMMENTS
COMMENTS
Low Detect
or
OL
= Busy
LH28F008SA
28F008SA-5
13