Cypress CY7C1357C, CY7C1355C Scan Register Sizes, Identification Codes, Register Name Bit Size

		CY7C1355C
		CY7C1357C
Scan Register Sizes
Register Name	Bit Size (x36)	Bit Size (x18)
Instruction	3	3
Bypass	1	1
ID	32	32
Boundary Scan Order (119-ball BGA package)	69	69
Boundary Scan Order (165-ball FBGA package)	69	69

Identification Codes

Instruction	Code	Description
EXTEST	000	Captures I/O 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 I/O 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 I/O 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
		operations.

Document #: 38-05539 Rev. *E Page 15 of 28

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