37/42

M29W160ET, M29W160EB

Figure 19. Programmer Equipment Block Protect Flowchart

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.

ADDRESS = BLOCK ADDRESS

AI03469b

G, A9 = VID,

E = VIL

n = 0

Wait 4µs

Wait 100µs

W = VIL

(1)

W = VIH

E, G = VIH,

A0, A6 = VIL,

A1 = VIH

A9 = VIH

E, G = VIH

++n

= 25

START

FAIL

PASS

YES

NO

DATA

=

01h

YES

NO

W = VIH

E = VIL

(1)

Wait 4µs

G = VIL

Wait 60ns

Read DATA

A9 = VIH

E, G = VIH