Question: After downloading a firmware program from the Keil IDE and it's running the little monitor routine, Which IO pins will be active with the monitor running?
Answer: The monitor that is downloaded automatically on start up is mon-ext-sio1-e0.hex (for EZ-USB and EZ-USB FX). This monitor uses serial port 1 (SIO-1) to talk to the device. PORTB pins, bit 2 and bit3 are used for RxD1 and TxD1 for receiving and transmitting data respectively. Hence PORTB pins 2 and 3 are dedicated for their alternate functions and are not available as general purpose I/O.If you are using the monitor that uses SIO-0, RxD0 and TxD0 are alternate functions on PORTC bits 0 and 1 respectively. PORTC pins 0 and 1 are no more available for general purpose I/O
