M29W640DB90N6T(2004) 查看數據表（PDF） - STMicroelectronics

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M29W640DB90N6T
(Rev.:2004)

64 Mbit (8Mb x8 or 4Mb x16, Boot Block) 3V Supply Flash Memory

STMicroelectronics 

M29W640DT, M29W640DB

Figure 16. Programmer Equipment Group Protect Flowchart

START

ADDRESS = GROUP ADDRESS

W = VIH

n=0

G, A9 = VID,

E = VIL

Wait 4µs

W = VIL

Wait 100µs

W = VIH

E, G = VIH,

A0, A6 = VIL,

A1 = VIH

E = VIL

Wait 4µs

G = VIL

Wait 60ns

Read DATA

DATA NO

=

01h

YES

A9 = VIH

E, G = VIH

PASS

++n NO

= 25

YES

A9 = VIH

E, G = VIH

FAIL

Note: Block Protection Groups are shown in APPENDIX D., Table 19. and Table 20..

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