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dropping in exact part (different pin labels) without re-routing? [message #170237] Sun, 09 April 2017 17:56 Go to next message
Mr. uC
Messages: 2
Registered: October 2016
Junior Member
Hi,

I have PDIP two parts, say, A and B, both of which have exact pin count and footprints, etc.  Their IO pins are different.  I created a schematic and routed BRD file with part A.  Now, how would I substitute part A for B to the schematic without doing the routing of the traces again on my BRD file?  The traces are the same, except the labeling.

Thanks!

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Re: dropping in exact part (different pin labels) without re-routing? [message #170239 is a reply to message #170237] Sun, 09 April 2017 23:10 Go to previous messageGo to next message
warrenbrayshaw
Messages: 1762
Registered: January 2010
Location: New Zealand
Senior Member
You create the second device, (the B item), in the library as it will have a different part number. When you place that device in the schematic the correct package appears on the board., displaying the desired labels.

HTH
Warren
Re: dropping in exact part (different pin labels) without re-routing? [message #170241 is a reply to message #170237] Mon, 10 April 2017 07:03 Go to previous messageGo to next message
Hans Lederer
Messages: 301
Registered: June 2008
Senior Member
Am 09.04.2017 um 19:56 schrieb Mr. uC:
> Hi,
>
> I have PDIP two parts, say, A and B, both of which have exact pin
count and footprints, etc. Their IO pins are different. I created a
schematic and routed BRD file with part A. Now, how would I substitute
part A for B to the schematic without doing the routing of the traces
again on my BRD file? The traces are the same, except the labeling.
>

HELP REPLACE

You generate two library devices which have the same PACKAGE, i.e. the
same footprint and (important!) the same pad names. If they are in the
same library, just use the same package; else, copy the package to the
new lib.

When you just delete Part A in your schematic and then insert Part B,
(only) the last segment of your traces to the part will be ripped up and
have to be rerouted.

When you REPLACE it in the board, you will have to choose whether to
reconnect the same pin names or the same pad names — in your case, the
latter. No ripup and rerouting then.

HTH, Hans
Re: dropping in exact part (different pin labels) without re-routing? [message #170242 is a reply to message #170241] Mon, 10 April 2017 07:34 Go to previous message
Hans Lederer
Messages: 301
Registered: June 2008
Senior Member
Am 10.04.2017 um 09:03 schrieb Hans Lederer:
> Am 09.04.2017 um 19:56 schrieb Mr. uC:
>> Hi,
>>
>> I have PDIP two parts, say, A and B, both of which have exact pin
>> count and footprints, etc. Their IO pins are different. I created a
>> schematic and routed BRD file with part A. Now, how would I substitute
>> part A for B to the schematic without doing the routing of the traces
>> again on my BRD file? The traces are the same, except the labeling.
>>
>
> HELP REPLACE
>
> You generate two library devices which have the same PACKAGE, i.e. the
> same footprint and (important!) the same pad names. If they are in the
> same library, just use the same package; else, copy the package to the
> new lib.
>
> When you just delete Part A in your schematic and then insert Part B,
> (only) the last segment of your traces to the part will be ripped up and
> have to be rerouted.
>
> When you REPLACE it in the board, you will have to choose whether to
> reconnect the same pin names or the same pad names — in your case, the
> latter. No ripup and rerouting then.
>
> HTH, Hans
>

Sorry, that was simply wrong. One should look it up instead relying on
a old grey storage…

Do create your part B with exactly the same PACKAGE (so the board will
not be changed) and a SYMBOL that may have different pin names, but has
its pins at the same spatial coords as part A (copy part A's symbol and
only change the pin names).

Then, in your schematic, REPLACE part A by part B, choosing “same
coords”. Done without ripup and rerouting.
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