Cypress CY7C1143V18 Identification Register Definitions, Scan Register Sizes, Instruction Codes

CY7C1141V18, CY7C1156V18

CY7C1143V18, CY7C1145V18

Identification Register Definitions

Instruction Field		Value			Description
	CY7C1141V18	CY7C1156V18	CY7C1143V18	CY7C1145V18
Revision Number	000	000	000	000	Version number.
(31:29)
Cypress Device ID	11010010101000101	11010010101001101	11010010101010101	11010010101100101	Defines the type of
(28:12)					SRAM.
Cypress JEDEC ID	00000110100	00000110100	00000110100	00000110100	Enables unique
(11:1)					identification of
					SRAM vendor.
ID Register	1	1	1	1	Indicates the
Presence (0)					presence of an ID
					register.

Scan Register Sizes

Register Name	Bit Size
Instruction	3
Bypass	1
ID	32
Boundary Scan	107

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. This 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. This operation 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: 001-06583 Rev. *D Page 18 of 28

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