How to define scan clocks in DFTC?

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dft123

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Hi,
I am using Synopsys DC/DFTC to insert scan at IP level.

I have 2 clocks at the IP ports: CLK and TST_CLK. The PLL sits outside the IP and CLK is assumed to be PLL clock. TST_CLK is the shift clock. Both these clocks goes into a CKGEN block (kind of OCC in RTL) where one single internal clock CCLK comes out. This act as the shift clock during shift and also the at-speed clock during capture and is routed to all scanable flops in the design.

What is the best way to define this clocking to DFTC during scan insertion?
 

in the scan mode, the scan clock is TST_CLK, so forgot the CLK pin. all your design will be balance for the worst case with TST_CLK.
 

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