M29W320ET, M29W320EB
Figure 22. In-system Equipment Chip Unprotect flowchart
Block Protection
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
1. Block Protection groups are shown in Appendix A: Block Addresses, Table 20 and Table 21.
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