Cypress CY7C1387DV25 - Manual (Page 10)

CY7C1386DV25, CY7C1386FV25
CY7C1387DV25, CY7C1387FV25
Document Number: 38-05548 Rev. *E Page 10 of 30
Partial Truth Table for Read/Write [5, 10]
Function (CY7C1386DV25/CY7C1386FV25) 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 – (DQ
A
and DQP
A
) H L H H H L
Write Byte B – (DQ
B
and DQP
B
) H L H H L H
Write Bytes B, A H L H H L L
Write Byte C – (DQ
C
and DQP
C
) H L H L H H
Write Bytes C, A H L H L H L
Write Bytes C, B H L H L L H
Write Bytes C, B, A H L H L L L
Write Byte D – (DQ
D
and DQP
D
) H L L H H H
Write Bytes D, A H L L H H L
Write Bytes D, B H L L H L H
Write Bytes D, B, A H L L H L L
Write Bytes D, C H L L L H H
Write Bytes D, C, A H L L L H L
Write Bytes D, C, B H L L L L H
Write All Bytes H L L L L L
Write All Bytes L X X X X X
Truth Table for Read/Write [5, 10]
Function (CY7C1387DV25/CY7C1387FV25) GW BWE BW
B
BW
A
Read H H X X
Read H L H H
Write Byte A – (DQ
A
and DQP
A
) H L H L
Write Byte B – (DQ
B
and DQP
B
) H L L H
Write All Bytes H L L L
Write All Bytes L X X X
Note
10. Table only lists a partial listing of the byte write combinations. Any combination of BW
X
is valid appropriate write will be done based on which byte write is active.
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