W29GL032C datasheet(21/66 Pages) WINBOND

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W29GL032C

Publication Release Date: October 18, 2011

Preliminary - Revision E

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:

Figure 7-1

Enhanced Sector Protect/Un-protect IPB Program Algorithm

Start

Individual Protection

Mode

(Default)

Set IPB

Lock Bit

IPB lock Bit locked

All IPB not changeable

Dynamic Write Protect bit

(DPB)

Sector Array

Individual Protect bit

(IPB)

DPB=0 Sector Protect

DPB=1 Sector Unprotect

IPB Lock bit Unlocked

IPB is Changeable

DPB 0

DPB 1

DPB 2

DPB + n

SA 0

SA 1

SA 2

SA + n

IPB 0

IPB 1

IPB 2

IPB + n

IPB=0 Sector Protect

IPB=1 Sector Unprotect

IPB=0

IPB=1

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