M29W640GB NUMONYX [Numonyx B.V], M29W640GB Datasheet - Page 86

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

Block Protection
86/90
Figure 28. In-System Equipment Chip Unprotect flowchart
1. Block Protection Groups are shown in
ISSUE READ/RESET
NO
COMMAND
RP = V IH
= 1000
FAIL
++n
YES
ADDRESS = CURRENT GROUP ADDRESS
ADDRESS = CURRENT GROUP ADDRESS
M29W640GH, M29W640GL, M29W640GT, M29W640GB
Appendix
A0, A2, A3 = V IL , A1, A6 = V IH
A0, A2, A3, A6 = V IL , A1 = V IH
A0, A2, A3 = V IL , A1, A6 = V IH
A0, A2, A3 = V IL , A1, A6 = V IH
PROTECT ALL GROUPS
CURRENT GROUP = 0
ANY ADDRESS WITH
ANY ADDRESS WITH
NO
READ DATA
A, Tables
WRITE 60h
WRITE 60h
WRITE 40h
Wait 10ms
RP = V ID
Wait 4µs
START
DATA
n = 0
00h
=
28
YES
and 29.
ISSUE READ/RESET
COMMAND
RP = V IH
GROUP
PASS
LAST
YES
CURRENT GROUP
INCREMENT
NO
AI11564