M58WR064T datasheet(34/81 Pages) STMICROELECTRONICS

Part #	M58WR064T

Description	64 Mbit (4Mb x 16, Multiple Bank, Burst ) 1.8V Supply Flash Memory

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M58WR064T, M58WR064B

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Table 13. Lock Status

Note: 1. The lock 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.

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

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

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