Cypress CY7C1294DV18 Identification Register Definitions, Scan Register Sizes, Instruction Codes

							CY7C1292DV18
							CY7C1294DV18
Identification Register Definitions
				Value
Instruction Field		CY7C1292DV18			CY7C1294DV18		Description
Revision Number (31:29)	000				000		Version number.
Cypress Device ID (28:12)	11010011010010110				11010011010100110		Defines the type of SRAM.
Cypress JEDEC ID (11:1)	00000110100				00000110100		Unique identification of SRAM vendor.
ID Register Presence (0)	1				1		Indicates the presence of an ID register.
Scan Register Sizes
Register Name		Bit Size
Instruction		3
Bypass		1
ID		32
Boundary Scan Cells		107
Instruction Codes
Instruction		Code				Description
EXTEST	000		Captures the Input/Output ring contents.
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 operation.
SAMPLE Z	010		Captures the Input/Output 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 the Input/Output ring contents. Places the boundary scan register
			between TDI and TDO. Does not affect the SRAM operation.
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 #: 001-00350 Rev. *A Page 14 of 23

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