> that RA4 is open collector

I think the 4550 is one on which a4 does have both FETs. Or if it
doesn't the datsheet makes no mention of it being oc. I can't think
of a PIC with a PortA oc that isn't a4 so your a0 should be good

Joe


-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2015.0.6173 / Virus Database: 4450/10873 - Release Date: 10/22/15

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