Test command

Description

RESET

Takes the boundary-scan logic to Test-Logic-Reset (equivalent to SVF “STATE RESET”)

TMS0, TMS1

Set TMS to 0/1 and generate one TCK clock pulse (enabling the implementation of any SVF “STATE”

command)

MTCK N

Sets TMS to 0 and generates N TCK pulses (enables the multiple TCK tests carried out by SVF “RUNTEST”)

SHF1 N X

Shifts an N-bit bitstream (X) into the [instruction | selected data] register(s) (data bits shifted out are ignored)

SHFCP1 N X, Y, Z

Shifts an N-bit bitstream (X) into the [instruction | selected data] register(s), and compares the output bitstream with its expected response (Y), in all positions indicated by the mask bitstream (Z) (enables the scan &

compare “SDR” and “SIR” SVF commands)

ZBS N

Issues N zero bit scan sequences by counting N TMS edge counts (used to generate IEEE 1149.7 commands and to set the control level)

ESC N

Issues N escape sequences (used to select, deselect, reset, and set up other IEEE 1149.7 specific operations)

SHF7O1 N X

Equivalent to SHF1 above, but using the 1149.7 advanced scan format OScan1

SHFCP7O1 N X, Y, Z

Equivalent to SHFCP1 above, but using the 1149.7 advanced scan format OScan1