Hi, I am wanting to use the ARM cortex M0 UART at 921.6Kbaud, what is the =20 best way of arangeing the UART RX, what type of buffering and how much =20 functionality should be in the ISR? Thanks --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .