I've done my USB projects with the Silicon Labs CP2102. Future Technology Devices has similar chips. These are USB to async (like EIA232) that you can simply drive a PIC USART with. You don't have to mess with USB protocols at all. Harold -- FCC Rules Updated Daily at http://www.hallikainen.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist