Block protection
M29W800DT, M29W800DB
Table 28. Programmer technique bus operations, BYTE = V or V
IH
IL
Address inputs
Data inputs/outputs
DQ15A–1, DQ14-DQ0
Operation
E
G
W
A0-A18
A9 = VID, A12-A18 block address
others = X
Block protect
VIL
VID VIL pulse
X
X
A9 = VID, A12 = VIH, A15 = VIH
others = X
Chip unprotect
VID VID VIL pulse
A0 = VIL, A1 = VIH, A6 = VIL, A9 = VID,
A12-A18 block address
Pass = XX01h
Retry = XX00h
Block protection
verify
VIL
VIL
VIH
others = X
A0 = VIL, A1 = VIH, A6 = VIH,
A9 = VID, A12-A18 block address
Retry = XX01h
Pass = XX00h
Block unprotection
verify
VIL
VIL
VIH
others = X
46/52