Cypress CY7C1473V25 manual Scan Register Sizes, Identification Codes, Register Name Bit Size

					CY7C1471V25
					CY7C1473V25
					CY7C1475V25
Scan Register Sizes
Register Name			Bit Size (x36)	Bit Size (x18)	Bit Size (x72)
Instruction		3		3	3
Bypass		1		1	1
ID		32		32	32
Boundary Scan Order – 165FBGA		71		52	-
Boundary Scan Order – 209BGA		-		-	110
Identification Codes
Instruction	Code			Description
EXTEST	000		Captures IO ring contents. Places the boundary scan register between TDI and
			TDO. Forces all SRAM outputs to High-Z state. This instruction is not 1149.1
			compliant.
IDCODE	001		Loads the ID register with the vendor ID code and places the register between TDI
			and TDO. This operation does not affect SRAM operations.
SAMPLE Z	010		Captures IO ring contents. Places the boundary scan register between TDI and
			TDO. Forces all SRAM output drivers to a High-Z state.
RESERVED	011		Do Not Use: This instruction is reserved for future use.
SAMPLE/PRELOAD	100		Captures IO ring contents. Places the boundary scan register between TDI and
			TDO. Does not affect SRAM operation. This instruction does not implement 1149.1
			preload function and is therefore not 1149.1 compliant.
RESERVED	101		Do Not Use: This instruction is reserved for future use.
RESERVED	110		Do Not Use: This instruction is reserved for future use.
BYPASS	111		Places the bypass register between TDI and TDO. This operation does not affect
			SRAM operation.

Document #: 38-05287 Rev. *I Page 18 of 32

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