M29W160ET, M29W160EB
Figure 17. Programmer Equipment Block Protect Flowchart
START
ADDRESS = BLOCK ADDRESS
W = V
IH
n = 0
G, A9 = V
E = V
,
ID
IL
Wait 4µs
(1)
W = V
IL
Wait 100µs
W = V
IH
E, G = V
,
IH
A0, A6 = V
A1 = V
,
IL
IH
(1)
E = V
IL
Wait 4µs
G = V
IL
Wait 60ns
Read DATA
DATA
=
01h
NO
YES
++n
= 25
NO
A9 = V
IH
E, G = V
IH
YES
PASS
A9 = V
E, G = V
IH
IH
AI03469b
FAIL
Note: 1. Address Inputs A19-A12 give the address of the block that is to be protected. It is imperative that they remain stable during the
operation.
2. During the Protect and Verify phases of the algorithm, Chip Enable E must be kept Low, V .
IL
35/40