Switching Waveforms (continued)
Write Cycle No. 3 (WE Controlled, OE LOW)[14]
ADDRESS
CE1
tWC
tSCE
CE2
tSA
WE
tSCE
tAW
tPWE
DATA I/O
NOTE 15
tHZWE
Truth Table
CE1 CE2 OE WE
I/O0–I/O7
H
X
X
X High Z
X
L
X
X High Z
L
H
L
H Data Out
L
H
X
L Data In
L
H
H
H High Z
tSD
DATA VALID
Mode
Power-Down
Power-Down
Read
Write
Selected, Outputs Disabled
CY7C109B
CY7C1009B
tHA
tHD
tLZWE
Power
Standby (ISB)
Standby (ISB)
Active (ICC)
Active (ICC)
Active (ICC)
Document #: 38-05038 Rev. *C
Page 6 of 10
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