Cypress CY7C2576KV18 Scan Register Sizes Register Name Bit Size, Instruction Codes Description

			PRELIMINARY		CY7C2561KV18, CY7C2576KV18
					CY7C2563KV18, CY7C2565KV18
Table 7. Identification Register Definitions
Instruction Field				Value			Description
	CY7C2561KV18			CY7C2576KV18	CY7C2563KV18	CY7C2565KV18
Revision Number	000			000	000	000	Version number.
(31:29)
Cypress Device ID	11010010001000100			11010010001001100	11010010001010100	11010010001100100	Defines the type of
(28:12)							SRAM.
Cypress JEDEC ID	00000110100			00000110100	00000110100	00000110100	Allows unique
(11:1)							identification of
							SRAM vendor.
ID Register	1			1	1	1	Indicates the
Presence (0)							presence of an ID
							register.
Table 8. Scan Register Sizes
		Register Name				Bit Size
Instruction						3
Bypass						1
ID						32
Boundary Scan						109
Table 9. Instruction Codes
Instruction		Code			Description
EXTEST		000	Captures the input and 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 and 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 and 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 Number: 001-15887 Rev. *E Page 18 of 29

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