Cypress CY7C1520AV18 Identification Register Definitions, Scan Register Sizes, Instruction Codes

CY7C1516AV18, CY7C1527AV18

CY7C1518AV18, CY7C1520AV18

Identification Register Definitions

Instruction Field

Value

CY7C1516AV18 CY7C1527AV18 CY7C1518AV18 CY7C1520AV18

Description

Revision Number	000	000	000	000	Version number.
(31:29)
Cypress Device ID	11010100010000100	11010100010001100	11010100010010100	11010100010100100	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.

Scan Register Sizes

Register Name

Bit Size

Instruction

Bypass

ID

Boundary Scan

3

1

32

109

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: 001-06982 Rev. *D Page 17 of 30

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