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CY7C1318CV18
CY7C1320CV18
Document Number: 001-07160 Rev. *F Page 15 of 26
Identification Register Definitions
Instruction Field
Value
Description
CY7C1318CV18 CY7C1320CV18
Revision Number (31:29) 000 000 Version number.
Cypress Device ID (28:12) 11010100010010101 11010100010100101 Defines the type of SRAM.
Cypress JEDEC ID (11:1) 00000110100 00000110100 Allows unique identification of
SRAM vendor.
ID Register Presence (0) 1 1 Indicates the 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. 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.
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