Cypress CY7C1345G - Manual (Page 9)

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.