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Altera_Forum
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12 years ago

Can we specify cut timing path along with the code?

Hello, I have a toggle synchronizer like below and want to exclude the domain crossing register transfer ce_t1 <= ce_toggle from timing analysis. Is there any way to do it automatically, e.g. b...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Hi Frank,

Would you please share your code in which you are able to cut the timings between two nodes?

I want to cut the timing between two nodes same as in your example.Following is my code

reg wptr;

(* altera_attribute = "-name CUT on -from wptr" *) reg rq1_wptr;

reg rq2_wptr;

always @(posedge clk or negedge rst_n)

if(~rst_n)

{rq2_wptr,rq1_wptr} <= {1'b0,1'b0};

else

{rq2_wptr,rq1_wptr} <= {rq1_wptr,wptr};

Thanks,

Krupesh