CY7C1460AV33CY7C1462AV33CY7C1464AV33Document #: 38-05353 Rev. *D Page 14 of 27
Scan Register Sizes
Register Name Bit Size (×36) Bit Size (×18) Bit Size (×72)
Instruction 3 3 3
Bypass 1 1 1
ID 32 32 32
Boundary Scan Order (165-ball FBGA package) 89 89 -
Boundary Scan Order (209-ball FBGA package) - - 138
Identification Codes
Instruction Code Description
EXTEST 000 Captures I/O ring contents. Places the boundary scan register between TDI and TDO.
Forces all SRAM outputs to High-Z state.
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 operations.
SAMPLE Z 010 Captures I/O ring 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 I/O ring contents. Places the boundary scan register between TDI and TDO.
Does not affect 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
operations.
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