M29W320ET, M29W320EB
Figure 22. In-System Equipment Group Protect Flowchart
START
n = 0
RP = V
ID
WRITE 60h
ADDRESS = GROUP ADDRESS
A0 = V , A1 = V , A6 = V
IL
IH
IL
WRITE 60h
ADDRESS = GROUP ADDRESS
A0 = V , A1 = V , A6 = V
IL
IH
Wait 100µs
WRITE 40h
IL
ADDRESS = GROUP ADDRESS
A0 = V , A1 = V , A6 = V
IL
IH
IL
Wait 4µs
READ DATA
ADDRESS = GROUP ADDRESS
A0 = V , A1 = V , A6 = V
IL
IH
IL
DATA
NO
=
01h
YES
++n
= 25
NO
RP = V
IH
YES
ISSUE READ/RESET
COMMAND
RP = V
IH
PASS
ISSUE READ/RESET
COMMAND
FAIL
AI05576
Note: 1. Block Protection Groups are shown in APPENDIX A., Table 20. and Table 21.
2. RP can be either at V or at V when using the In-System Technique to protect the Extended Block.
IH
ID
43/46
STMICROELECTRONICS [ ST ]
