lrs1383 Sharp Microelectronics of the Americas, lrs1383 Datasheet - Page 89
lrs1383
Manufacturer Part Number
lrs1383
Description
Stacked Chip 32m Flash And 8m Sram
Manufacturer
Sharp Microelectronics of the Americas
Datasheet
1.LRS1383.pdf
(114 pages)
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Figure 11. Set Block Lock Bit and Set Block Lock-down Bit Flowchart
Appendix to Spec No.: MFM2-J13207
FUM00701
Model No.: LRS1383
Repeat for the subsequent set block lock/lock-down bit.
Lock status check can be done after each set block lock/
lock-down bit operation or after a sequence of set block
lock/lock-down bit operations.
SR.5 and SR.4 are only cleared by the Clear Status
Register command in cases where multiple block lock/
lock-down bits are set 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 set block lock/lock-down
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
Lock Bit/Set
Block Lock-
Read Status
Command
Command
Set Block
down Bit
Register
March 1, 2001
<First cycle>
Data=60H
Addr=Within Block to be
Locked or Locked-down
<Second cycle>
Data= 01H (Lock Bit), or
2FH(Lock-down Bit)
Addr=Within Block to be
Locked or Locked-down
Status Register Data
Addr=Within Partition
Check SR.4, 5
Both 1=Command Sequence
Error
Data=90H
Addr=Within Partition
Lock Bit or Lock-down Bit
Data
Addr=Block Address+2
Table 8)
Check DQ
1=Lock Bit or Lock-down
Bit is Set
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
/DQ
1
Rev. 2.20
43
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