On Mon, Mar 22, 2010 at 2:21 PM, wrote: > > I am asking this because I've always seen RS-232 interfaces isolated, and > my configuration is odd (normally a stand-alone unit with a stand-alone > power supply, and an optional USB data download/control interface.) Is > there any harm from isolating an interface which doesn't requite it? > > Any help appreciated. Thanks! > > My worry would be slew issues from not have an opto-isolator receiver that could deal with 12Mhz? AFAIK, most implementations are just fine without opto-isolation. -marc -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist