set
DFT signal -view existing dft -type ScanClock -hookup pin [get pins xx] -timing [list 45 55]
Discarded dft sianal specification
set_dft_drc_configuration -internal_pins on
如果hookup_pin是internal pin(无法直接通过port trace到的,如时序逻辑的输出pin),就需要打开internal_pin flow;如果不是internal pin,需要同时指定-port