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M28W160CT, M28W160CB

Table 9. Block Lock Status

Table 10. Protection Status

Note: 1. The protection status is defined by the write protect pin and by DQ1 (‘1’ for a locked-down block) and DQ0 (‘1’ for a locked block)

2. All blocks are locked at power-up, so the default configuration is 001 or 101 according to WP status.

Item

Address

Data

Block Lock Configuration

xx002

LOCK

Block is Unlocked

DQ0=0

Block is Locked

DQ0=1

Block is Locked-Down

DQ1=1

Current

(WP, DQ1, DQ0)

(WP, DQ1, DQ0)

Current State

Program/Erase

Allowed

After

Block Lock

Command

After

Block Unlock

Command

After Block

Lock-Down

Command

After

WP transition

1,0,0

yes

1,0,1

1,0,0

1,1,1

0,0,0

no

1,0,1

1,0,0

1,1,1

0,0,1

1,1,0

yes

1,1,1

1,1,0

1,1,1

0,1,1

1,1,1

no

1,1,1

1,1,0

1,1,1

0,1,1

0,0,0

yes

0,0,1

0,0,0

0,1,1

1,0,0

no

0,0,1

0,0,0

0,1,1

1,0,1

0,1,1

no

0,1,1

0,1,1

0,1,1