Truth table, Switching waveforms – Cypress CY62157CV33 User Manual
Page 10
CY62157CV30/33
Document #: 38-05014 Rev. *F
Page 10 of 13
Write Cycle No. 4 (BHE/BLE Controlled, OE LOW)
[19]
Truth Table
CE
1
CE
2
WE
OE
BHE
BLE
Inputs/Outputs
Mode
Power
H
X
X
X
X
X
High Z
Deselect/Power-Down
Standby (I
SB
)
X
L
X
X
X
X
High Z
Deselect/Power-Down
Standby (I
SB
)
X
X
X
X
H
H
High Z
Deselect/Power-Down
Standby (I
SB
)
L
H
H
L
L
L
Data Out (I/O
O
–I/O
15
)
Read
Active (I
CC
)
L
H
H
L
H
L
Data Out (I/O
O
–I/O
7
);
I/O
8
–I/O
15
in High Z
Read
Active (I
CC
)
L
H
H
L
L
H
Data Out (I/O
8
–I/O
15
);
I/O
0
–I/O
7
in High Z
Read
Active (I
CC
)
L
H
H
H
L
L
High Z
Output Disabled
Active (I
CC
)
L
H
H
H
H
L
High Z
Output Disabled
Active (I
CC
)
L
H
H
H
L
H
High Z
Output Disabled
Active (I
CC
)
L
H
L
X
L
L
Data In (I/O
O
–I/O
15
)
Write
Active (I
CC
)
L
H
L
X
H
L
Data In (I/O
O
–I/O
7
);
I/O
8
–I/O
15
in High Z
Write
Active (I
CC
)
L
H
L
X
L
H
Data In (I/O
8
–I/O
15
);
I/O
0
–I/O
7
in High Z
Write
Active (I
CC
)
Switching Waveforms
(continued)
DATA I/O
ADDRESS
t
HD
t
SD
t
SA
t
HA
t
AW
t
WC
CE
1
WE
DATA
IN
VALID
NOTE 20
t
BW
BHE/BLE
t
SCE
CE
2
t
PWE