Cypress CY7C1381DV25, CY7C1383DV25, CY7C1381FV25, CY7C1383FV25 manual Truth Table for Read/Write 4

CY7C1381DV25, CY7C1381FV25

CY7C1383DV25, CY7C1383FV25

Truth Table for Read/Write [4, 9]

Function (CY7C1381DV25/CY7C1381FV25)	GW	BWE	BWD	BWC	BWB	BWA
Read	H	H	X	X	X	X
Read	H	L	H	H	H	H
Write Byte A (DQA, DQPA)	H	L	H	H	H	L
Write Byte B (DQB, DQPB)	H	L	H	H	L	H
Write Bytes A, B (DQA, DQB, DQPA, DQPB)	H	L	H	H	L	L
Write Byte C (DQC, DQPC)	H	L	H	L	H	H
Write Bytes C, A (DQC, DQA, DQPC, DQPA)	H	L	H	L	H	L
Write Bytes C, B (DQC, DQB, DQPC, DQPB)	H	L	H	L	L	H
Write Bytes C, B, A (DQC, DQB, DQA, DQPC,	H	L	H	L	L	L
DQPB, DQPA)
Write Byte D (DQD, DQPD)	H	L	L	H	H	H
Write Bytes D, A (DQD, DQA, DQPD, DQPA)	H	L	L	H	H	L
Write Bytes D, B (DQD, DQA, DQPD, DQPA)	H	L	L	H	L	H
Write Bytes D, B, A (DQD, DQB, DQA, DQPD,	H	L	L	H	L	L
DQPB, DQPA)
Write Bytes D, B (DQD, DQB, DQPD, DQPB)	H	L	L	L	H	H
Write Bytes D, B, A (DQD, DQC, DQA, DQPD,	H	L	L	L	H	L
DQPC, DQPA)
Write Bytes D, C, A (DQD, DQB, DQA, DQPD,	H	L	L	L	L	H
DQPB, DQPA)
Write All Bytes	H	L	L	L	L	L
Write All Bytes	L	X	X	X	X	X

Truth Table for Read/Write [4, 9]

Function (CY7C1383DV25/CY7C1383FV25)	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

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.

Document #: 38-05547 Rev. *E Page 10 of 28

[+] Feedback