
M29DW640F
Block protection
Figure 22.
In-System Equipment Group Protect flowchart
1.
2.
RP can be either at VIH or at VID when using the In-System Technique to protect the Extended Block.
AI07758
WRITE 60h
ADDRESS = GROUP ADDRESS
A0, A2, A3, A6 = VIL, A1 = VIH
n = 0
Wait 100s
WRITE 40h
ADDRESS = GROUP ADDRESS
A0, A2, A3, A6 = VIL, A1 = VIH
RP = VIH
++n
= 25
START
PASS
YES
NO
DATA = 01h
YES
NO
RP = VIH
Wait 4s
Verify
Protect
Set-up
End
READ DATA
ADDRESS = GROUP ADDRESS
A0, A2, A3, A6 = VIL, A1 = VIH
RP = VID
ISSUE READ/RESET
COMMAND
WRITE 60h
ADDRESS = GROUP ADDRESS
A0, A2, A3, A6 = VIL, A1 = VIH
ISSUE READ/RESET
COMMAND
FAIL