Cypress CY7C1166V18 - Manual (Page 17)

CY7C1166V18, CY7C1177V18
CY7C1168V18, CY7C1170V18
Document Number: 001-06620 Rev. *D Page 17 of 27
Identification Register Definitions
Instruction Field
Value
Description
CY7C1166V18 CY7C1177V18 CY7C1168V18 CY7C1170V18
Revision Number
(31:29) 000 000 000 000 Version number.
Cypress Device ID
(28:12) 11010111000000101 11010111000001101 11010111000010101 11010111000100101 Defines the type of
SRAM.
Cypress JEDEC ID
(11:1) 00000110100 00000110100 00000110100 00000110100 Allows unique
identification of
SRAM vendor.
ID Register
Presence (0) 1 1 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 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 Output contents. It 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 output ring contents. It 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.
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