9-bit mode in ausart modul isnt enough for rs-485 systems? an excerpt from the 18fxx2 datasheet 16.2.3 SETTING UP 9-BIT MODE WITH ADDRESS DETECT "This mode would typically be used in RS-485 systems." -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist