CY7C1306BV25CY7C1303BV25
Document #: 38-05627 Rev. *A Page 13 of 19

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. Places the bo undary 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 In put/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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