LH28F800 Sharp Electrionic Components, LH28F800 Datasheet - Page 22

• Manufacturer Part Number: LH28F800
• Description: 8 M-bit (512 kB x 16) SmartVoltage Flash Memories
• Manufacturer: Sharp Electrionic Components

FULL STATUS CHECK PROCEDURE
Block/Device Address
Block/Device Address
Read Status Register
Data (See Above)
Check if Desired
Write 01H/F1H,
Status Register
Set Lock-Bit
Set Lock-Bit
Successful
Write 60H,
Full Status
Complete
SR.4, 5 =
SR.7 =
SR.3 =
SR.1 =
SR.4 =
Read
Start
0
0
0
0
1
0
1
1
1
1
Fig. 7 Set Block and Permanent Lock-Bit Flowchart
Command Sequence
Device Protect Error
V
PP
Set Lock-Bit
Range Error
Error
Error
OPERATION COMMAND
Standby
Standby
Standby
Standby
- 22 -
SR.5, SR.4, SR.3 and SR.1 are only cleared by the Clear
Status Register command in cases where multiple lock-bits are
set before full status is checked.
If error is detected, clear the status register before attempting
retry or other error recovery.
OPERATION
Write
Write
Read
Standby
BUS
Repeat for subsequent lock-bit set operations.
Full status check can be done after each lock-bit set
operation or after a sequence of lock-bit set operations.
Write FFH after the last lock-bit set operation to place device
in read array mode.
BUS
Block or Permanent
LH28F800SG-L/SGH-L (FOR TSOP, CSP)
Block/Permanent
COMMAND
Lock-Bit
Lock-Bit
Confirm
Setup
Set
Set
Check SR.3
1 = V
Check SR.1
1 = Device Protect Detect
RP# = V
WP# = V
Permanent Lock-Bit is Set
Check SR.4, 5
Both 1 = Command Sequence Error
Check SR.4
1 = Set Lock-Bit Error
(Set Permanent Lock-Bit Operation)
(Set Block Lock-Bit Operation)
PP
Data = 60H
Addr = Block Address (Block),
Data = 01H (Block),
Addr = Block Address (Block),
Status Register Data
Check SR.7
1 = WSM Ready
0 = WSM Busy
Error Detect
IH
IL
and RP# = V
COMMENTS
Device Address (Parmanent)
F1H (Parmanent)
Device Address (Parmanent)
COMMENTS
IH
or