M29W320DB70N1E_03 Ver la hoja de datos (PDF) - STMicroelectronics

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M29W320DB70N1E_03

32 Mbit (4Mb x8 or 2Mb x16, Boot Block) 3V Supply Flash Memory

STMicroelectronics 

M29W320DT, M29W320DB

Figure 21. In-System Equipment Chip Unprotect Flowchart

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

=

00h

YES

LAST NO

BLOCK

YES

RP = VIH

ISSUE READ/RESET

COMMAND

PASS

AI03472

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