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TestPrep Automatic- Allow pin escape insertion problem

archive
archive over 18 years ago

Hi guys

Has any you used the Allow pin escape insertion feature on the Automatic TestPrep ?
i understand that this feature adds via (as ICT ) so it needs to check/move all traces in all layers where it wants to add a via.

I have a board of about 3300 nets and want to add ICT's to (only 2700 need ICT).
when running the the TestPrep with the Allow pin escape insertion  feature checked then the ICT insertion rate is very slow
and when i say slow i mean 63 nets proccessed in  11 hours (over night)
i have a strong PC with XP Prof with 1G of Ram and Allegro Preformance

when i run the same just without this feature then it finishes after about 1 hour ( with 3 passes - eg. 3 probe types enabled) (results are 1300 ICT added out of 2700 nets need ICT)

Has any of you used this feature ? with any success ?
am i doing something wrong ? or did i forget to do something ?

attached the testprep automatic form and general parameters TAB with checked features

thank you for the help
roby


Originally posted in cdnusers.org by robyd
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  • archive
    archive over 18 years ago

    Hi Mike

    thank you for the effort and the share of your idea's

    now i understand that a "OLD" router is involved i understand
    i see that there is a log being generated tprouter.log ( which i don't understand at all)
    but i found that it includs a time column which was in average 4-5 minutes i assume per try/via
    any way my board is about 110 Sq in and the grid was 5 mils.
    i changed it to 50 mils and rerun it
    now in ran about 5 min BUT... only 3 ICT inserted !! (2-3 seconds per try in the tprouter.log)
    tried with grid of 25 mils and it ran 14 minutes with 5 ICT !?!(7-10 seconds per try in the tprouter.log)
    another try with 10 mil grid (which is still running)  i get about 1 minute per row in the log file

    it seems that when the allow insertion is enabled that the regular via replacement or smt over trace (on bottom) is disabled - it is not logical !

    when i ran it with 5 mil grid with out the allow pin insertion checked so only pad stack replacement and smt ICT added on tarces was done there were 1300 ICT inserted in less then 30 minutes ( in a faster machine )

    when i understood that grid may cause the algorithm not to find possible ICT locations that also satisfy the grid i decided to lower it to 0.1 mil and run it without the allow pin insertion and see if i get a higher ICT count ( more then 1300)
    the result was the same i think i got the exact ICT count
    so my theory is not right !

    any way i understand that the preofrmance of the automatic pin insertion feature is less then POOR ! or else you can suggest any thing else?
    it is not working as expected.

    about the idea of script ( and alias) it is very good
    but it lacks in that the length and direction of the stub are different for each and every case.
    so i my idea is : (did not try it yet)
    after adding the stub as desired ( direction and length)
    to excute ( by funckey x "done;setwindow pcb;testprep manual;ipick 0 0;done;add connect"

    done ( of the previous add connect)
    setwindow pcb
    testprep manual
    ipick 0 0
    done
    add connect

    and then continue add stub to the next place
    do you thing it will work ?

    about the replace regular via to ICT one i probably did something wrong.since i have it defined in the replacment table TAB and it is enabled

    about my last question
    i meant that i want to add an ICT in amiddle of  a trace that runs in internal layer!
    so i want to be able ( theoretically ) to add a TH ICT VIA on the middle of an internal trace.and to benefit from the good push and shove feature of the allegro.
    so now after your tip about the script i guess i can change to fit this case also
    or else you have a better solution ?

    again thank you very much for your effort.
    Roby Drath
    MEMTEK Elec Eng


    Originally posted in cdnusers.org by robyd
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  • archive
    archive over 18 years ago

    Hi Mike

    thank you for the effort and the share of your idea's

    now i understand that a "OLD" router is involved i understand
    i see that there is a log being generated tprouter.log ( which i don't understand at all)
    but i found that it includs a time column which was in average 4-5 minutes i assume per try/via
    any way my board is about 110 Sq in and the grid was 5 mils.
    i changed it to 50 mils and rerun it
    now in ran about 5 min BUT... only 3 ICT inserted !! (2-3 seconds per try in the tprouter.log)
    tried with grid of 25 mils and it ran 14 minutes with 5 ICT !?!(7-10 seconds per try in the tprouter.log)
    another try with 10 mil grid (which is still running)  i get about 1 minute per row in the log file

    it seems that when the allow insertion is enabled that the regular via replacement or smt over trace (on bottom) is disabled - it is not logical !

    when i ran it with 5 mil grid with out the allow pin insertion checked so only pad stack replacement and smt ICT added on tarces was done there were 1300 ICT inserted in less then 30 minutes ( in a faster machine )

    when i understood that grid may cause the algorithm not to find possible ICT locations that also satisfy the grid i decided to lower it to 0.1 mil and run it without the allow pin insertion and see if i get a higher ICT count ( more then 1300)
    the result was the same i think i got the exact ICT count
    so my theory is not right !

    any way i understand that the preofrmance of the automatic pin insertion feature is less then POOR ! or else you can suggest any thing else?
    it is not working as expected.

    about the idea of script ( and alias) it is very good
    but it lacks in that the length and direction of the stub are different for each and every case.
    so i my idea is : (did not try it yet)
    after adding the stub as desired ( direction and length)
    to excute ( by funckey x "done;setwindow pcb;testprep manual;ipick 0 0;done;add connect"

    done ( of the previous add connect)
    setwindow pcb
    testprep manual
    ipick 0 0
    done
    add connect

    and then continue add stub to the next place
    do you thing it will work ?

    about the replace regular via to ICT one i probably did something wrong.since i have it defined in the replacment table TAB and it is enabled

    about my last question
    i meant that i want to add an ICT in amiddle of  a trace that runs in internal layer!
    so i want to be able ( theoretically ) to add a TH ICT VIA on the middle of an internal trace.and to benefit from the good push and shove feature of the allegro.
    so now after your tip about the script i guess i can change to fit this case also
    or else you have a better solution ?

    again thank you very much for your effort.
    Roby Drath
    MEMTEK Elec Eng


    Originally posted in cdnusers.org by robyd
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