M58LR128HT datasheet(52/112 Pages) STMICROELECTRONICS

部件名	M58LR128HT

功能描述	128 Mbit (8 Mb ×16, Multiple Bank, Multilevel interface, Burst) 1.8 V supply Flash memories

PDF	112 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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52 / 112 page

Block locking

M58LR128HT, M58LR128HB

52/112

Table 16.

Lock status

Current Protection Status(1)

(WP, DQ1, DQ0)

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 DQ1 = VIH and DQ0 = 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)

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

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

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)

0,0,1

0,0,0

0,1,1

1,0,1

0,1,1

1,1,1 or 1,1,0(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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