why are there 8 bits to select the analog input

[Torsten Robitzki]

I'm just reading the documentation regarding the analog digital converter and wonder why there is one bit in the configuration register for every analog input. What will happen when I set more than one bit in CONFIG.D?

cheers Torsten

[Stefan Birnir Sverrisson]

Hi

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.

[Torsten Robitzki]

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!