On Tue, 16 Apr 2013 14:51:12 -0300 John Coppens wrote: > The port is an output, which I can notice with the oscilloscope. > It is really low continually. Solved. There was a microscopic trace left which grounded the output. Apart from invisible to the naked eye, it was discolored, probably due to the (insufficient) etching.=20 Punishment for ignoring the golden rule to first test the test pin, before using it to test something else... Cheers, John --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .