CY7C1292DV18
CY7C1294DV18
Document #: 001-00350 Rev. *A Page 14 of 23
Identification Register Definitions
Instruction Field
Value
DescriptionCY7C1292DV18 CY7C1294DV18
Revision Number (31:29) 000 000 Version number.
Cypres s Devic e ID (28 :12) 11010011010010110 11010011010100110 Define s the ty pe of SR AM.
Cypress JEDEC ID (11:1) 00000110100 00000110100 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 Cells 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. 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/Output ring co ntents. 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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