M29W400DT ST Microelectronics, M29W400DT Datasheet - Page 34
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M29W400DT
Manufacturer Part Number
M29W400DT
Description
4 Mbit (512Kb x8 or 256Kb x16 / Boot Block) 3V Supply Flash Memory
Manufacturer
ST Microelectronics
Datasheet
1.M29W400DT.pdf
(36 pages)
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M29W400DT, M29W400DB
Figure 22. In-System Equipment Chip Unprotect Flowchart
34/36
ISSUE READ/RESET
NO
COMMAND
RP = V IH
= 1000
FAIL
++n
YES
ADDRESS = CURRENT BLOCK ADDRESS
ADDRESS = CURRENT BLOCK ADDRESS
A0 = V IL , A1 = V IH , A6 = V IH
A0 = V IL , A1 = V IH , A6 = V IH
A0 = V IL , A1 = V IH , A6 = V IH
A0 = V IL , A1 = V IH , A6 = V IH
PROTECT ALL BLOCKS
CURRENT BLOCK = 0
ANY ADDRESS WITH
ANY ADDRESS WITH
NO
READ DATA
WRITE 60h
WRITE 60h
WRITE 40h
Wait 10ms
RP = V ID
Wait 4µs
START
DATA
n = 0
00h
=
YES
ISSUE READ/RESET
COMMAND
RP = V IH
BLOCK
PASS
LAST
YES
CURRENT BLOCK
INCREMENT
NO
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