M29W640GB NUMONYX [Numonyx B.V], M29W640GB Datasheet - Page 84

• Manufacturer Part Number: M29W640GB
• Description: 64 Mbit (8Mb x8 or 4Mb x16, Page) 3V supply Flash memory
• Manufacturer: NUMONYX [Numonyx B.V]

Block Protection
84/90
Figure 26. Programmer Equipment Chip Unprotect flowchart
1. Block Protection Groups are shown in
NO
E, G = V IH
A9 = V IH
= 1000
FAIL
++n
YES
ADDRESS = CURRENT GROUP ADDRESS
A6 =V IH,
M29W640GH, M29W640GL, M29W640GT, M29W640GB
A0, A2, A3 = V IL , A1 =V IH ,
Appendix
PROTECT ALL GROUPS
CURRENT GROUP = 0
A6, A12, A15 = V IH (1)
NO
E, G, A9 = V ID
Read DATA
A9 = VID,
Wait 10ms
E, G = V IH
Wait 60ns
Wait 4µs
Wait 4µs
W = V IH
W = V IL
E = V IL
G = V IL
START
DATA
A, Tables
n = 0
00h
=
Others = X
YES
28
and 29.
E, G = V IH
A9 = V IH
GROUP
PASS
LAST
YES
CURRENT GROUP
INCREMENT
NO
AI11556b