CY7C1484V25 データシートの表示（PDF） - Cypress Semiconductor
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CY7C1484V25 Datasheet PDF : 26 Pages
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CY7C1484V25
CY7C1485V25
Truth Table for Read/Write
The read/write truth table for CY7C1484V25 follows.[5, 8]
Function (CY7C1484V25)
GW
Read
H
Read
H
Write Byte A – (DQA and DQPA)
H
Write Byte B – (DQB and DQPB)
H
Write Bytes B, A
H
Write Byte C – (DQC and DQPC)
H
Write Bytes C, A
H
Write Bytes C, B
H
Write Bytes C, B, A
H
Write Byte D – (DQD and DQPD)
H
Write Bytes D, A
H
Write Bytes D, B
H
Write Bytes D, B, A
H
Write Bytes D, C
H
Write Bytes D, C, A
H
Write Bytes D, C, B
H
Write All Bytes
H
Write All Bytes
L
Truth Table for Read/Write
The read/write truth table for CY7C1485V25 follows.[5]
Function (CY7C1485V25)
Read
Read
Write Byte A – (DQA and DQPA)
Write Byte B – (DQB and DQPB)
Write All Bytes
BWE
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
X
BWD
X
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
X
BWC
X
H
H
H
H
L
L
L
L
H
H
H
H
L
L
L
L
X
BWB
X
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
X
BWA
X
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
X
GW
BWE
BWB
BWA
H
H
X
X
H
L
H
H
H
L
H
L
H
L
L
H
H
L
L
L
Note
8. Table contains only a partial listing of the byte write combinations. Any combination of BWX is valid. Appropriate write is based on which byte write is active.
Document #: 38-05286 Rev. *H
Page 9 of 26
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