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need help on some DFT problem

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zjwang

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In one design, there are both posedge and negedge FFs. for the dft design, if i want to put all the negedge FFs at the begining of the scan chain, how can i make the constrain in the script?
 

What is the tool u are using? Well u can can define scan chain order. That is possible with every tool
 

i use synopsys's DFT compiler
 

All tools will put the negedge flops in front of the posedge flops. Synopsys included.

John

for DFT talk/info go to:
DFT Digest
DFT Forum
 

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