Cypress CY7C1462AV33 User Manual
Page 14
CY7C1460AV33
CY7C1462AV33
CY7C1464AV33
Document #: 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.