ADC operation


I am hoping to use the ADC module on the Connectcore 9P. The proccesor hardware description is fairly minimal on the precise characteristics of the A/D and the correct way to interface to it.

I have set up my dev board to put a 3.00V refernce on the ADC connector and tried driving channels from a calibrated voltage source.

The values that get returned from the ADC do bear some relation to the input voltage, but seems to be extremely noisy. Has anyone got this working and are there any tips on the sort of interface that is required to get the A/D to give reliable values.