lrs1382 Sharp Microelectronics of the Americas, lrs1382 Datasheet - Page 91
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lrs1382
Manufacturer Part Number
lrs1382
Description
Flash Memory
Manufacturer
Sharp Microelectronics of the Americas
Datasheet
1.LRS1382.pdf
(114 pages)
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Appendix to Spec No.: MFM2-J13222
Figure 12. Clear Block Lock Bit Flowchart
FUM00701
Model No.: LRS1382
Repeat for the subsequent clear block lock bit.
Lock status check can be done after each clear block lock
bit operation or after a sequence of clear block lock bit
operations.
SR.5 and SR.4 are only cleared by the Clear Status
Register command in cases where multiple block lock
bits are cleared before full status is checked.
If an error is detected, clear the status register before
attempting retry or other error recovery.
Write FFH after a sequence of clear block lock bit
operations to place device in read array mode.
Operation
Operation
Standby
Standby
Standby
Write
Write
Write
Read
Read
Read
Bus
Bus
Read ID Code
Clear Block
Read Status
Command
Command
Lock Bit
Register
March 1, 2001
<First cycle>
Data=60H
Addr=Within Block to be
Unlocked
<Second cycle>
Data= D0H
Addr=Within Block to be
Unlocked
Status Register Data
Addr=Within Partition
Check SR.4, 5
Both 1=Command Sequence
Error
Data=90H
Addr=Within Partition
Lock Bit Data
Addr=Block Address+2
Table 8)
Check DQ
0=Lock Bit is Cleared
Data=70H
Addr=Within Partition
Status Register Data
Addr=Within Partition
Check SR.7
1=WSM Ready
0=WSM Busy
(see Table 6 through
Comments
Comments
0
Rev. 2.20
45
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