Thanks Bill for quick reply and clarification.
Actually I was planning to use Auto Router & want Auto Router to swap pins on
the go i.e. while it route the signals. Assuming we have one component J1, can
Auto Route swap pins on the go with in same Reference designator? I checked at
J1 and it did not swap pins and leave many connections as un-routed. I believe
using swap pins, we may allow Router to route more trace. Any idea on this
part?
On Monday, March 20, 2017 4:00 PM, Bill OLeary <boleary@xxxxxxxxxxxxxx>
wrote:
Ali,I'm pretty sure that is correct. In order to swap a pin with allegro, the
pins have to be part of the same ref-des,AND they must be part of the same
schematic symbol (if the part is fractured into multiple symbols)Allegro is
looking at the pstchips.dat file for the part to determine what is swappable.
I am pretty sure they must be the same pin-type too... when we build the
schematic symbols for an fpga with pin swapping enabled, we make sure to
override the pintypes to inout.
I think the reason for this is so that allegro can feedback the pin-swaps to
the symbols in the schematic tool. It would be very difficult to do thatacross
reference designators and across schematic symbols. (because nets would have
to move)
I think there might be a way around some of those limitations with the
dalTools addon, but you would be responsible for fixing
the schematic side once you made the swaps
We have always bypassed the automatic feedback step. We would generate a swap
report between the pre-swapped netlist and the post-swap netlist and
then update the symbols based on the changes we find in there. (We have not
swapped between ref-des in those cases)
Thanks,Bill
Bill O'LearyFounder/Lead Developer CadEnhance EDA Productivity Tools(214)
280-8804
-Your EDA Tools.... @The Speed of CadEnhancewww.CadEnhance.com
On Mon, Mar 20, 2017 at 5:59 AM, Ali <dmarc-noreply@xxxxxxxxxxxxx> wrote:
Hi Group,
I read about pin swapping in Allegro by defining pin group in Orcad. My
question is if we have two instances of connectors say J1 and J2, is it
possible to swap pins between two different reference designators?I tried in
Allegro and got below message
Pins must be on the same gate in order to swap them ... pick again.
