M29F800FT5AN6E2 Datasheet, PDF (65/67 Pages) Numonyx B.V – Top / Bottom Boot Block 5 V Supply Flash Memory

M29FxxxFT, M29FxxxFB
Figure 30. In-System Equipment Chip Unprotect Flowchart
Block protection
START
PROTECT ALL BLOCKS
n=0
CURRENT BLOCK = 0
RP = VID
WRITE 60h
ANY ADDRESS WITH
A0 = VIL, A1 = VIH, A6 = VIH
WRITE 60h
ANY ADDRESS WITH
A0 = VIL, A1 = VIH, A6 = VIH
Wait 10ms
WRITE 40h
ADDRESS = CURRENT BLOCK ADDRESS
A0 = VIL, A1 = VIH, A6 = VIH
Wait 4µs
READ DATA
ADDRESS = CURRENT BLOCK ADDRESS
A0 = VIL, A1 = VIH, A6 = VIH
INCREMENT
CURRENT BLOCK
NO ⁺⁺ⁿ
= 1000
YES
RP = VIH
ISSUE READ/RESET
COMMAND
FAIL
NO DATA
=
00h
YES
LAST NO
BLOCK
YES
RP = VIH
ISSUE READ/RESET
COMMAND
PASS
AI03472
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