Analysing the User manual of EMX, on page 11 we can read:
For example, analog channel 3 (ADC3) and the analog output (AOUT) are on
the same pin IO22. Either function can be used but not both of them simultaneously. Visit
Advanced Users section.
However IO22 is mapped on RD CAN Channel 1 Data Receive pin (In).
Should we read IO7 (ADC3 (10Bit Analog to Digital Input) or DAC (Digital to Analog Output)
or Serial port (UART) RXD receive signal (In) for COM4.) instead of IO22?