CY7C1345G
Document Number: 38-05517 Rev. *E
Page 9 of 20
Truth Table for Read or Write
The partial truth table for read or write follows.
[1, 6]
Function
GW
BWE
BW
D
BW
C
BW
B
BW
A
Read
H
H
X
X
X
X
Read
H
L
H
H
H
H
Write Byte (A, DQP
A
)
H
L
H
H
H
L
Write Byte (B, DQP
B
)
H
L
H
H
L
H
Write Bytes (B, A, DQP
A
, DQP
B
)
H
L
H
H
L
L
Write Byte (C, DQP
C
)
H
L
H
L
H
H
Write Bytes (C, A, DQP
C
, DQP
A
)
H
L
H
L
H
L
Write Bytes (C, B, DQP
C
, DQP
B
)
H
L
H
L
L
H
Write Bytes (C, B, A, DQP
C
, DQP
B
, DQP
A
)
H
L
H
L
L
L
Write Byte (D, DQP
D
)
H
L
L
H
H
H
Write Bytes (D, A, DQP
D
, DQP
A
)
H
L
L
H
H
L
Write Bytes (D, B, DQP
D
, DQP
A
)
H
L
L
H
L
H
Write Bytes (D, B, A, DQP
D
, DQP
B
, DQP
A
)
H
L
L
H
L
L
Write Bytes (D, B, DQP
D
, DQP
B
)
H
L
L
L
H
H
Write Bytes (D, B, A, DQP
D
, DQP
C
, DQP
A
)
H
L
L
L
H
L
Write Bytes (D, C, A, DQP
D
, DQP
B
, DQP
A
)
H
L
L
L
L
H
Write All Bytes
H
L
L
L
L
L
Write All Bytes
L
X
X
X
X
X
Note
6. This table is only a partial listing of the byte write combinations. Any combination of BW
x
is valid. Appropriate write is done based on the active byte write.
