M28W160ECB データシートの表示（PDF） - Numonyx -> Micron

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M28W160ECB

16 Mbit (1Mb x16, Boot Block) 3V Supply Flash Memory

Numonyx -> Micron 

M28W160ECT, M28W160ECB

Table 8. Block Lock Status

Item

Block Lock Configuration

Block is Unlocked

Block is Locked

Block is Locked-Down

Address

xx002

Data

LOCK

DQ0=0

DQ0=1

DQ1=1

Table 9. Protection Status

Current

Protection Status(1)

(WP, DQ1, DQ0)

Next Protection Status(1)

(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

1,0,1(2)

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

0,0,1(2)

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

1,1,1 or 1,1,0 (3)

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)

as read in the Read Electronic Signature command with A1 = VIH and A0 = VIL.

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

3. A WP transition to VIH on a locked block will restore the previous DQ0 value, giving a 111 or 110.

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