AnsweredAssumed Answered

pullups and open-collectors

Question asked by volain on Dec 16, 2009
Latest reply on Feb 16, 2010 by olivier_arnaud

I'm having trouble with the DRC for OCL pins.  I get the following error messages for the same net which has an OCL pin at one end, an INPUT pin at the other, and a resistor(R52) to my +2_5VD power:

1)     "More than one driver on a net"

2)     "Open Collector pin is not tied to VDD"

 

I tried adding R52 to the "pull-up symbols" and +2_5VD to "pull-up nets".  Didn't work.  Also Tried adding RES (DEVICE value) to pull-up symbols.  I'm not sure how to define pullup symbols and pullup nets correctly.

 

What am I doing wrong?

 

Thanks,

 

Barry

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