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M29W640FT Datasheet(PDF) 68 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) 68 Page - Numonyx B.V

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Block protection
M29W640FT, M29W640FB
68/71
Figure 18.
In-System Equipment Group Protect flowchart
1.
Block Protection Groups are shown in Appendix A, Tables 21 and 22.
2.
RP can be either at VIH or at VID when using the In-System Technique to protect the Extended Block.
AI11563
WRITE 60h
ADDRESS = GROUP ADDRESS
A0, A2, A3, A6 = VIL, A1 = VIH
n = 0
Wait 100µs
WRITE 40h
ADDRESS = GROUP ADDRESS
A0, A2, A3, A6 = VIL, A1 = VIH
RP = VIH
++n
= 25
START
FAIL
PASS
YES
NO
DATA
=
01h
YES
NO
RP = VIH
Wait 4µs
READ DATA
ADDRESS = GROUP ADDRESS
A0, A2, A3, A6 = VIL, A1 = VIH
RP = VID
ISSUE READ/RESET
COMMAND
ISSUE READ/RESET
COMMAND
WRITE 60h
ADDRESS = GROUP ADDRESS
A0, A2, A3, A6 = VIL, A1 = VIH


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