CY7C1021
Switching Waveforms
(continued)
Write Cycle No.3 (WE Controlled, LOW)
t
WC
ADDRESS
CE
t
SCE
t
AW
t
SA
t
PWE
t
HA
WE
t
BW
BHE, BLE
t
HZWE
DATA I/O
t
LZWE
t
SD
t
HD
1021-10
Truth Table
CE
H
L
OE
X
L
WE
X
H
BLE
X
L
L
H
L
X
L
L
L
H
L
L
H
X
H
X
X
H
BHE
X
L
H
L
L
H
L
X
H
I/O
1
–I/O
8
High Z
Data Out
Data Out
High Z
Data In
Data In
High Z
High Z
High Z
I/O
9
–I/O
16
High Z
Data Out
High Z
Data Out
Data In
High Z
Data In
High Z
High Z
Power-Down
Read - All bits
Read - Lower bits only
Read - Upper bits only
Write - All bits
Write - Lower bits only
Write - Upper bits only
Selected, Outputs Disabled
Selected, Outputs Disabled
Mode
Power
Standby (I
SB
)
Active (I
CC
)
Active (I
CC
)
Active (I
CC
)
Active (I
CC
)
Active (I
CC
)
Active (I
CC
)
Active (I
CC
)
Active (I
CC
)
Document #: 38-05054 Rev. **
Page 6 of 9
CYPRESS [ CYPRESS SEMICONDUCTOR ]
