M29F080D90N6E 查看數據表（PDF） - STMicroelectronics

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M29F080D90N6E

8 Mbit (1Mb x8, Uniform Block) 5V Supply Flash Memory

STMicroelectronics 

Figure 17. In-System Equipment Chip Unprotect Flowchart

M29F080D

START

PROTECT ALL GROUPS

n=0

CURRENT GROUP = 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 GROUP ADDRESS

A0 = VIL, A1 = VIH, A6 = VIH

Wait 4µs

READ DATA

ADDRESS = CURRENT GROUP ADDRESS

A0 = VIL, A1 = VIH, A6 = VIH

INCREMENT

CURRENT GROUP

NO ++n

= 1000

YES

RP = VIH

ISSUE READ/RESET

COMMAND

FAIL

NO DATA

=

00h

YES

LAST NO

GROUP

YES

RP = VIH

ISSUE READ/RESET

COMMAND

PASS

AI05577

Note: Block Protection Groups are shown in Appendix A, Table 15.

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