M29W320ET, M29W320EB
Figure 21. Programmer Equipment Chip Unprotect Flowchart
START
PROTECT ALL GROUPS
n = 0
CURRENT GROUP = 0
(1)
A6, A12, A15 = V
IH
E, G, A9 = V
ID
Wait 4µs
W = V
IL
Wait 10ms
W = V
IH
E, G = V
IH
ADDRESS = CURRENT GROUP ADDRESS
A0 = V , A1, A6 = V
IL
IH
E = V
IL
Wait 4µs
G = V
IL
INCREMENT
CURRENT GROUP
Wait 60ns
Read DATA
NO
YES
DATA
=
00h
LAST
GROUP
NO
NO
++n
= 1000
YES
YES
A9 = V
IH
A9 = V
IH
E, G = V
E, G = V
IH
IH
FAIL
PASS
AI05575
Note: Block Protection Groups are shown in APPENDIX A., Table 20. and Table 21.
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