Cypress CY7C1471BV25, CY7C1473BV25, CY7C1475BV25 manual Truth Table for Read/Write, Function

CY7C1471BV25

CY7C1473BV25, CY7C1475BV25

Table 5. Truth Table for Read/Write
The read-write truth table for CY7C1471BV25 follows.[1, 2, 8]
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

Table	6. Truth Table for Read/Write
The read-write truth table for CY7C1473BV25 follows.[1, 2, 8]
	Function	WE	BW	b	BW	a
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

Table 7. Truth Table for Read/Write

The read-write truth table for CY7C1475BV25 follows.[1, 2, 8]

Function	WE		BW		x
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

8. This table is 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 #: 001-15013 Rev. *E Page 12 of 30

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