lh28f008sc Sharp Microelectronics of the Americas, lh28f008sc Datasheet - Page 15

• Manufacturer Part Number: lh28f008sc
• Description: 8m 1m ? 8 Flash Memory
• Manufacturer: Sharp Microelectronics of the Americas

8M (1M × 8) Flash Memory
FULL STATUS CHECK PROCEDURE
CHECK IF DESIRED
WRITE BYTE DATA
REGISTER DATA
AND ADDRESS
READ STATUS
READ STATUS
SUCCESSFUL
FULL STATUS
BYTE WRITE
COMPLETED
BYTE WRITE
WRITE 40H
(see above)
REGISTER
ADDRESS
START
SR.7 =
SR.3 =
SR.1 =
SR.4 =
0
0
0
1
0
1
1
1
SUSPEND
BYTE WRITE
NO
WRITE?
V
PROTECT
BYTE
PP
DEVICE
ERROR
ERROR
ERROR
RANGE
ERASE SUSPEND
Figure 7. Automated Byte Write Flowchart
WRITE LOOP
YES
Repeat for subsequent byte writes.
SR full status check can be done after each byte write or
after a sequence of byte writes.
Write FFH after the last byte write operation to place
device in read array mode.
SR.4, SR.3 and SR.1 are only cleared by the Clear Status
Register Command in cases where multiple locations are written
before full status is checked.
If error is detected, clear the Status Register before attempting
retry or other error recovery.
OPERATION
OPERATION
Standby
Standby
Standby
Standy
Read
Write
Write
BUS
BUS
COMMAND
COMMAND
Byte Write
Setup
Write
Byte
Data = 40H
Addr = Location to be written
Data = Data to be written
Addr = Location to be written
Status Register Data
Check SR.7
1 = WSM Ready
0 = WSM Busy
Check SR.3
1 = V
Check SR.1
1 = Device Protect Detect
RP = V
Only required for systems
implemening lock-bit
configuration
Check SR.4
1 = Data Write Error
PP
IH
Low Detect
COMMENTS
COMMENTS
Block Lock-Bit is Set
LH28F008SC
28F008SC-7
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