lh28f800bje-pttlz1 Sharp Microelectronics of the Americas, lh28f800bje-pttlz1 Datasheet - Page 26

• Manufacturer Part Number: lh28f800bje-pttlz1
• Manufacturer: Sharp Microelectronics of the Americas

FULL STATUS CHECK PROCEDURE
Set Lock-Bit Successful
Block/Device Address
Read Status Register
Data(See Above)
Write 01H/F1H,
Check if Desired
Status Register
Set Lock-Bit
Read Status
Write 60H
Write 70H
Full Status
Complete
SR.4,5=
Register
SR.4=
SR.7=
SR.7=
SR.3=
SR.1=
Read
Start
1
1
0
0
0
0
0
0
1
1
1
1
Device Protect Error
Command Sequence
V
Set Lock-Bit Error
CCW
Range Error
Error
Figure 11. Set Block and Permanent Lock-Bit Flowchart
Repeat for subsequent lock-bit set operations.
Full status check can be done after each lock-bit set operation or after a sequence of
Write FFH after the last lock-bit set operation to place device in read array mode.
SR.5, SR.4, SR.3 and SR.1 are only cleared by the Clear Status Register command in cases
If error is detected, clear the Status Register before attempting retry or other error recovery.
Operation
lock-bit set operations.
Operation
where multiple lock-bits are set before full status is checked.
Standby
Standby
Standby
Standby
Standby
Standby
Write
Write
Write
Read
Read
Bus
Bus
Block or Permanent
Lock-Bit Confirm
Block/Permanent
Lock-Bit Setup
Read Status
Command
Command
Register
Set
Set
Data=70H
Addr=X
Status Register Data
Check SR.7
1=WSM Ready
0=WSM Busy
Data=60H
Addr=X
Data=01H(Block),
Addr=Block Address(Block),
Status Register Data
Check SR.7
1=WSM Ready
0=WSM Busy
Check SR.3
1=V
Check SR.1
1=Device Protect Detect
Check SR.4,5
Both 1=Command Sequence Error
Check SR.4
1=Set Lock-Bit Error
Permanent Lock-Bit is Set
(Set Block Lock-Bit Operation)
CCW
F1H(Permanent)
Device Address(Permanent)
Error Detect
Comments
Comments
Rev. 1.27