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CY7C1441AV33
CY7C1443AV33,CY7C1447AV33
Document #: 38-05357 Rev. *G Page 11 of 31
Partial Truth Table for Read/Write
Function (CY7C1441AV33)
[2, 7]
GW BWE BW
D
BW
C
BW
B
BW
A
Read HHXXXX
Read HLHHHH
Write Byte A (DQ
A
, DQP
A
) HLHHHL
Write Byte B(DQ
B
, DQP
B
)HLHHLH
Write Bytes A, B (DQ
A
, DQ
B
, DQP
A
, DQP
B
)H L H H L L
Write Byte C (DQ
C
, DQP
C
)HLHLHH
Write Bytes C, A (DQ
C
, DQ
A,
DQP
C
, DQP
A
)H L H L H L
Write Bytes C, B (DQ
C
, DQ
B,
DQP
C
, DQP
B
)H L H L L H
Write Bytes C, B, A (DQ
C
, DQ
B
, DQ
A,
DQP
C
,
DQP
B
, DQP
A
)
HLHLLL
Write Byte D (DQ
D
, DQP
D
) HLLHHH
Write Bytes D, A (DQ
D
, DQ
A,
DQP
D
, DQP
A
)H L L H H L
Write Bytes D, B (DQ
D
, DQ
A,
DQP
D
, DQP
A
)H L L H L H
Write Bytes D, B, A (DQ
D
, DQ
B
, DQ
A,
DQP
D
,
DQP
B
, DQP
A
)
HLLHLL
Write Bytes D, B (DQ
D
, DQ
B,
DQP
D
, DQP
B
)H L L L H H
Write Bytes D, B, A (DQ
D
, DQ
C
, DQ
A,
DQP
D
,
DQP
C
, DQP
A
)
HLLLHL
Write Bytes D, C, A (DQ
D
, DQ
B
, DQ
A,
DQP
D
,
DQP
B
, DQP
A
)
HLLLLH
Write All Bytes H L L L L L
Write All Bytes L XXXXX
Truth Table for Read/Write
Function (CY7C1443AV33)
[2]
GW BWE BW
B
BW
A
Read H H X X
Read H L H H
Write Byte A - (DQ
A
and DQP
A
)HLHL
Write Byte B - (DQ
B
and DQP
B
)HLLH
Write All Bytes H L L L
Write All Bytes L X X X
Truth Table for Read/Write
Function (CY7C1447AV33)
[2, 8]
GW BWE BW
X
Read H H X
Read H L All BW
= H
Write Byte x – (DQ
x
and DQP
x
)HLL
Write All Bytes H L All BW
= L
Write All Bytes L X X
Notes
7. Table only lists a partial listing of the byte write combinations. Any Combination of BW
X
is valid Appropriate write is done based on which byte write is active.
8. BW
x
represents any byte write signal BW
[A..H]
.To enable any byte write BW
x,
a Logic LOW signal should be applied at clock rise.Any number of bye writes can be
enabled at the same time for any given write.
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