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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