Cypress Perform CY7C1354C User Manual
Page 14
CY7C1354C
CY7C1356C
Document #: 38-05538 Rev. *G
Page 14 of 28
Scan Register Sizes
Register Name
Bit Size (x36)
Bit Size (x18)
Instruction
3
3
Bypass
1
1
ID
32
32
Boundary Scan Order (119-ball BGA package)
69
69
Boundary Scan Order (165-ball FBGA package)
69
69
Identification Codes
Instruction
Code
Description
EXTEST
000
Captures the Input/Output ring contents. Places the boundary scan register between the 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 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 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.