MX29F200T/B
AUTOMATICCHIPERASETIMINGWAVEFORM
All data in chip are erased. External erase verification is
not required because data is erased automatically by
internal control circuit. Erasure completion can be
verified by DATA polling and toggle bit checking after
automaticerasestarts. Deviceoutputs0duringerasure
and1aftererasure0nQ7.(Q6isfortogglebit;seetoggle
bit, DATA polling, timing waveform)
AUTOMATIC CHIP ERASE TIMING WAVEFORM (WORD MODE)
Vcc 5V
A11~A16
555H
2AAH
555H
2AAH
555H
A0~A10
WE
555H
tAS
tCWC
tAH
tCEPH1
tAETC
CE
OE
tCEP
tDS tDH
Command In
Q0,Q1,
Command In
Command In
Command In
Command In
Command In
Command In
Q4(Note 1)
DATA polling
Command In
Command In
Command In
Command In
Command In
Q7
Command #80H
Command #AAH
Command #55H
Command #10H
Command #AAH
(Q0~Q7)
Command #55H
Notes:
(1). Q6:Toggle bit, Q5:Timing-limit bit, Q3: Time-out bit, Q2: Toggle bit
P/N:PM0549
REV. 1.3 , DEC. 24, 2001
28
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