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M29W640FT Datasheet(PDF) 69 Page - Numonyx B.V

Part # M29W640FT
Description  64 Mbit (8Mb x8 or 4Mb x16, Page, Boot Block) 3V Supply Flash Memory
Download  71 Pages
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Manufacturer  NUMONYX [Numonyx B.V]
Direct Link  http://www.numonyx.com
Logo NUMONYX - Numonyx B.V

M29W640FT Datasheet(HTML) 69 Page - Numonyx B.V

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M29W640FT, M29W640FB
Block protection
69/71
Figure 19.
In-System Equipment Chip Unprotect flowchart
1.
Block Protection Groups are shown in Appendix A, Tables 21 and 22.
AI11564
WRITE 60h
ANY ADDRESS WITH
A0, A2, A3 = VIL, A1, A6 = VIH
n = 0
CURRENT GROUP = 0
Wait 10ms
WRITE 40h
ADDRESS = CURRENT GROUP ADDRESS
A0, A2, A3 = VIL, A1, A6 = VIH
RP = VIH
++n
= 1000
START
FAIL
PASS
YES
NO
DATA
=
00h
YES
NO
RP = VIH
Wait 4µs
READ DATA
ADDRESS = CURRENT GROUP ADDRESS
A0, A2, A3 = VIL, A1, A6 = VIH
RP = VID
ISSUE READ/RESET
COMMAND
ISSUE READ/RESET
COMMAND
PROTECT ALL GROUPS
INCREMENT
CURRENT GROUP
LAST
GROUP
YES
NO
WRITE 60h
ANY ADDRESS WITH
A0, A2, A3, A6 = VIL, A1 = VIH


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