10 / 30 page
CY7C1386D, CY7C1386F
CY7C1387D, CY7C1387F
Document Number: 38-05545 Rev. *E
Page 10 of 30
Truth Table for Read/Write [6, 9]
Function (CY7C1386D/CY7C1386F)
GW
BWE
BWD
BWC
BWB
BWA
Read
H
H
XXX
X
Read
H
L
HHH
H
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
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 – (DQD and DQPD)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 [6, 9]
Function (CY7C1387D/CY7C1387F)
GW
BWE
BWB
BWA
Read
HH
X
X
Read
HL
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
9. 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.
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