why are there 8 bits to select the analog input

RE: why are there 8 bits to select the analog input

Torsten Robitzki — Fri, 06 Mar 2015 15:48:32 GMT

So the answer to my question would be something like: „There is no special reason; possibly this way the hardware design was easier„? I mean using 3 (lb 8) bits to simply address the analog input would be more intuitive to me ;-) But thank you for the feedback!

RE: why are there 8 bits to select the analog input

Stefan Birnir Sverrisson — Fri, 06 Mar 2015 10:14:46 GMT

Each PSEL bits in the ADC config register represent one AIN input pin. I think you should not enable more than one analog pin at each time for the ADC. You can however sample on multiple pins in time-multiplex fashion, like done in this example.