D2 and D3 violations of DFT compiler

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irun2

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Hi everyone,
I'm not familiar with DFT and not until recently I have to learn it.
following are the main scripts:

set_dft_signal -view spec -port SE -type scanenable
set_dft_signal -view spec -port SI -type scanDataIn
set_dft_signal -view spec -port SO -type scanDataOut
set_dft_signal -view spec -port TM -type testMode
set_dft_signal -view existing_dft -port clk -type scanClock -period 100 -timing {45 55}
set_dft_signal -view spec -port rst -type reset -active_state 0
create_test_protocol
dft_drc

There're D2 and D3 violations.
I know set_auto_fix and set_dft_config may do, but I don't know how to.
 

D2 and D3 violations come when set/reset ports are uncontrollable. Check the constraint for reset pin , are you sure it is active low or active high in scan mode.
 

Jennis said:
D2 and D3 violations come when set/reset ports are uncontrollable. Check the constraint for reset pin , are you sure it is active low or active high in scan mode.
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HI Jennis,
No matter what active_state i set to the rst port, dft_drc still complains with the same violations. But when I change it to -view existing_dft, the uncontrollable set/reset vio are clear! So confusing !
 

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