M29F800DB View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

M29F800DB

8 Mbit (1Mb x8 or 512Kb x16, Boot Block) 5V Supply Flash Memory

STMicroelectronics 

M29F800DT

Figure 19. In-System Equipment Chip Unprotect flowchart

Block protection

START

PROTECT ALL BLOCKS

n=0

CURRENT BLOCK = 0

RP = VID

WRITE 60h

ANY ADDRESS WITH

A0 = VIL, A1 = VIH, A6 = VIH

WRITE 60h

ANY ADDRESS WITH

A0 = VIL, A1 = VIH, A6 = VIH

Wait 10ms

WRITE 40h

ADDRESS = CURRENT BLOCK ADDRESS

A0 = VIL, A1 = VIH, A6 = VIH

Wait 4µs

READ DATA

ADDRESS = CURRENT BLOCK ADDRESS

A0 = VIL, A1 = VIH, A6 = VIH

INCREMENT

CURRENT BLOCK

NO ++n

= 1000

YES

RP = VIH

ISSUE READ/RESET

COMMAND

FAIL

NO DATA YES

=

00h

LAST NO

BLOCK

YES

RP = VIH

ISSUE READ/RESET

COMMAND

PASS

AI03472

51/53

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