M29F080D_05 Datasheet, PDF (32/37 Pages) STMicroelectronics – 8 Mbit (1Mb x8, Uniform Block) 5V Supply Flash Memory

M29F080D
Figure 14. 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 A, Table 15.
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AI05574