Cypress CY7C1475V33, CY7C1473V33, CY7C1471V33 Truth Table for Read/Write, Function BW b BW a

CY7C1471V33

CY7C1473V33

CY7C1475V33

Truth Table for Read/Write

The read-write truth table for CY7C1471V33 follows.[2, 3, 9]

Function	WE	BW	A	BW	B	BW	C	BW	D
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

The read-write truth table for CY7C1473V33 follows.[2, 3, 9]

Function
	WE	BWb	BWa
Read	H	X	X
Write – No Bytes Written	L	H	H
Write Byte a – (DQa and DQPa)	L	H	L
Write Byte b – (DQb and DQPb)	L	L	H
Write Both Bytes	L	L	L

Truth Table for Read/Write

The read-write truth table for CY7C1475V33 follows.[2, 3, 9]

Function					x
	WE		BW
Read	H			X
Write – No Bytes Written	L			H
Write Byte X − (DQx and DQPx)	L			L
Write All Bytes	L	All				= L
				BW

Note

9. Table only lists 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 #: 38-05288 Rev. *J Page 12 of 32

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