M29W800DB datasheet(50/52 Pages) NUMONYX

Part #	M29W800DB

Description	8-Mbit (1 Mbit x 8 or 512 Kbits x 16, boot block) 3 V supply flash memory

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Manufacturer	NUMONYX [Numonyx B.V]

Direct Link	http://www.numonyx.com

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50 / 52 page

Block protection

M29W800DT, M29W800DB

50/52

Figure 21.

In-system equipment chip unprotect flowchart

AI03472

WRITE 60h

ANY ADDRESS WITH

A0 = VIL, A1 = VIH, A6 = VIH

n = 0

CURRENT BLOCK = 0

Wait 10ms

WRITE 40h

ADDRESS = CURRENT BLOCK ADDRESS

A0 = VIL, A1 = VIH, A6 = VIH

RP = VIH

++n

= 1000

START

FAIL

PASS

YES

NO

DATA

=

00h

YES

NO

RP = VIH

Wait 4µs

READ DATA

ADDRESS = CURRENT BLOCK ADDRESS

A0 = VIL, A1 = VIH, A6 = VIH

RP = VID

ISSUE READ/RESET

COMMAND

ISSUE READ/RESET

COMMAND

PROTECT ALL BLOCKS

INCREMENT

CURRENT BLOCK

LAST

BLOCK

YES

NO

WRITE 60h

ANY ADDRESS WITH

A0 = VIL, A1 = VIH, A6 = VIH

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M29W800DB Datasheet(PDF) 50 Page - Numonyx B.V

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