M29W400DT ST Microelectronics, M29W400DT Datasheet - Page 32

• Manufacturer Part Number: M29W400DT
• Description: 4 Mbit (512Kb x8 or 256Kb x16 / Boot Block) 3V Supply Flash Memory
• Manufacturer: ST Microelectronics

M29W400DT, M29W400DB
Figure 20. Programmer Equipment Chip Unprotect Flowchart
32/36
NO
E, G = V IH
A9 = V IH
= 1000
FAIL
++n
YES
ADDRESS = CURRENT BLOCK ADDRESS
PROTECT ALL BLOCKS
CURRENT BLOCK = 0
A0 = V IL , A1, A6 = V IH
A6, A12, A15 = V IH (1)
NO
E, G, A9 = V ID
Read DATA
E, G = V IH
Wait 10ms
Wait 60ns
Wait 4µs
Wait 4µs
W = V IH
W = V IL
G = V IL
START
E = V IL
DATA
n = 0
00h
=
YES
E, G = V IH
A9 = V IH
BLOCK
PASS
LAST
YES
CURRENT BLOCK
INCREMENT
NO
AI03470