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IS25LQ032C View Datasheet(PDF) - Integrated Silicon Solution

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IS25LQ032C Datasheet PDF : 54 Pages
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IS25LQ032C
Appendix1: Sector Unlock function
Instruction Name
SECT_UNLOCK
SECT_LOCK
Hex
Code
26h
24h
Operation
Sector unlock
Sector lock
SEC_UNLOCK COMMAND OPERATION
The Sector unlock command allows the user to
select a specific sector to allow program and erase
operations. This instruction is effective when the
blocks are designated as write-protected through
the BP0, BP1, BP2 and BP3 bits in the status
register. Only one sector can be enabled at any
time. To enable a different sector, a previously
Figure d. Sector Unlock Sequence
Command
Cycle
4 Bytes
1 Byte
Maximum
Frequency
100 MHz
100 MHz
enabled sector must be disabled by executing a
Sector Lock command. The instruction code is
followed by a 24-bit address specifying the target
sector, but A0 through A11 are not decoded. The
remaining sectors within the same block remain in
read-only mode.
Note: 1.If the clock number will not match 8 clocks(command)+ 24 clocks (address), it will be ignored.
2.It must be executed write enable (06h) before sector unlock instructions.
Integrated Silicon Solution, Inc.- www.issi.com
Rev. A
51
08/20/2012
 

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