I’m running 15.2 Expert 610 and SI 230.
I’ve attached an image showing the topology. It has 2 of each device
instead of 4 of one device but still exhibits the same problem.
CJB
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*From:* Andy_Kulik@xxxxxxx [mailto:Andy_Kulik@xxxxxxx]
*Sent:* Thursday, January 13, 2005 4:25 PM
*To:* icu-pcb-forum@xxxxxxxxxxxxx
*Subject:* [PCB_FORUM] Re: CM Topology Assignment
Try changing the IO model to Out on U1 and IN on the rest.
What Version of Cadence are you using?
*Chris Brennan*
Sent by:
01/13/2005 04:01 PM
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Subject
[PCB_FORUM] CM Topology Assignment
Hi All. I'm having a problem with topology assignments.
When you have a topology with say one driver and 4 receivers and all 4
receivers are identical, with identical models, and I create a cset with
a specified schedule say;
U1 -> U2 -> U3 -> U4 -> U5
Now I apply this cset to a net that has devices, say:
U10, U11, U12, U13 and U14 (that I want ordered like that) the schedule
seems to be random since all devices are the same. IE:
U10 -> U12 ->U13 -> U14 -> U11
and the nextime you apply the topology it might be:
U10 -> U11 ->U14 -> U12 -> U13.
I cannot use REFDES mapping mode since they are all different
components. The other mapping modes behave the same.
Anyone have any suggestions? (Besides using a user schedule).
Thanks for any help.
Chris Brennan, C.I.D.
PCB Designer
Fidus Systems Inc.
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