Hi >I guess this is a tricky question : No, it isn't. >I need to use Asynchronous serial comm >of the 16f877. When doing that, do the others pin (Rc0->Rc5) still available >for standart I/O functions ? Yes, they are available for any use. I've tested it in an application. >Thanks Regards Les -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.