Cypress CY7C1373D Identification Register Definitions, Scan Register Sizes, Identification Codes

CY7C1371D

CY7C1373D

Identification Register Definitions

Instruction Field	CY7C1371D	CY7C1373D	Description
	(512K X 36)	(1M X 18)
Revision Number (31:29)	000	000	Describes the version number
Device Depth (28:24)	01011	01011	Reserved for internal use
Device Width (23:18)	001001	001001	Defines memory type and architecture
Cypress Device ID (17:12)	100101	010101	Defines width and density
Cypress JEDEC ID Code (11:1)	00000110100	00000110100	Allows unique identification of SRAM vendor
ID Register Presence Indicator (0)	1	1	Indicates the presence of an ID register

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)	85	85
Boundary Scan Order (165-Ball FBGA package)	89	89

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.
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.
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 #: 38-05556 Rev. *F Page 16 of 29

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