> So here's the question, what's the maximum safe loading on the Tx > port when its doing RS232, I'm imagining its in the region of 2mA, > but I can't find any details on the datasheet, and its seems unlikely > it would match the 20mA of the GPIOs... No spec for minimum high/low output voltage into a given load? -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist