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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
BWD
BWC
BWB
BWA
Read
H
H
XXXX
Read
H
L
HHHH
Write Byte A – (DQA and DQPA)
H
L
HHH
L
Write Byte B – (DQB and DQPB)H
L
H
H
L
H
Write Bytes B, A
H
L
H
H
L
L
Write Byte C – (DQC and DQPC)
H
LH
LH
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 – (DQD and DQPD)
H
L
L
HHH
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
LLLL
H
Write All Bytes
H
LLLLL
Write All Bytes
L
X
XXXX
Truth Table for Read/Write [5, 10]
Function (CY7C1387DV25/CY7C1387FV25)
GW
BWE
BWB
BWA
Read
H
H
X
X
Read
H
L
H
H
Write Byte A – (DQA and DQPA)H
L
H
L
Write Byte B – (DQB and DQPB)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 BWX is valid appropriate write will be done based on which byte write is active.