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W29GL032C
7.3
Enhanced Sector Protect/Un-protect
This device is set from the factory in the Individual Protection mode of the Enhanced Sector Protect
scheme. The user can disable or enable the programming or erasing operation to any individual sector
or whole chip. The figure below helps describe an overview of these methods.
The device defaults to the Individual mode and all sectors are unprotected when shipped from the
factory.
The following flow chart shows the detailed algorithm of Enhanced Sector Protect:
Start
Individual Protection
Mode
(Default)
IPB=0
Set IPB
Lock Bit
IPB=1
IPB Lock bit Unlocked
IPB is Changeable
IPB lock Bit locked
All IPB not changeable
Dynamic Write Protect bit
(DPB)
DPB=0 Sector Protect
DPB=1 Sector Unprotect
DPB 0
DPB 1
DPB 2
.
.
.
.
DPB + n
Sector Array
SA 0
SA 1
SA 2
.
.
.
.
SA + n
Individual Protect bit
(IPB)
IPB=0 Sector Protect
IPB=1 Sector Unprotect
IPB 0
IPB 1
IPB 2
.
.
.
.
IPB + n
Figure 7-1
Enhanced Sector Protect/Un-protect IPB Program Algorithm
Publication Release Date: August 2, 2013
15
Revision H
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