Cypress CY7C1387DV25 Partial Truth Table for Read/Write 5, Function CY7C1386DV25/CY7C1386FV25

CY7C1386DV25, CY7C1386FV25

CY7C1387DV25, CY7C1387FV25

Partial Truth Table for Read/Write [5, 10]

Function (CY7C1386DV25/CY7C1386FV25)	GW	BWE	BWD	BWC	BWB	BWA
Read	H	H	X	X	X	X
Read	H	L	H	H	H	H
Write Byte A – (DQA and DQPA)	H	L	H	H	H	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 [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.

Document Number: 38-05548 Rev. *E Page 10 of 30

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