M58WR064HT datasheet(53/111 Pages) NUMONYX

Part #	M58WR064HT

Description	64 Mbit (4Mb x16, Multiple Bank, Burst) 1.8V supply Flash memories

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Manufacturer	NUMONYX [Numonyx B.V]

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M58WR064HT, M58WR064HB

Block locking

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Table 15.

Lock Status

Current Protection Status(1)

(WP, DQ1, DQ0)

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.

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)

2.

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

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)

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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