Cypress CY7C1355C manual Partial Truth Table for Read/Write2, 3, Truth Table for Read/Write2, 3,9

CY7C1355C

CY7C1357C

Truth Table[2, 3, 4, 5, 6, 7, 8]

Address

Operation

Used

CE

1

CE2

CE

3

ZZ

ADV/LD

WE

BWX

OE

CEN

CLK

DQ

NOP/WRITE ABORT (Begin Burst)

None

L

H

L

L

L

L

H

X

L

L->H

Tri-State

WRITE ABORT (Continue Burst)

Next

X

X

X

L

H

X

H

X

L

L->H

Tri-State

IGNORE CLOCK EDGE (Stall)

Current

X

X

X

L

X

X

X

X

H

L->H

–

SLEEP MODE

None

X

X

X

H

X

X

X

X

X

X

Tri-State

Partial Truth Table for Read/Write[2, 3, 9]

Function (CY7C1355C)	WE	BWA	BWB	BWC	BWD
Read	H	X	X	X	X
Write No bytes written	L	H	H	H	H
Write Byte A – (DQA and DQPA)	L	L	H	H	H
Write Byte B – (DQB and DQPB)	L	H	L	H	H
Write Byte C – (DQC and DQPC)	L	H	H	L	H
Write Byte D – (DQD and DQPD)	L	H	H	H	L
Write All Bytes	L	L	L	L	L

Truth Table for Read/Write[2, 3,9]

Function (CY7C1357C)	WE	BWA	BWB
Read	H	X	X
Write - No bytes written	L	H	H
Write Byte A – (DQA and DQPA)	L	H	H
Write Byte B – (DQB and DQPB)	L	H	H
Write All Bytes	L	L	L

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 #: 38-05539 Rev. *E Page 10 of 28

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