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Adding additional GPIO ADC functionality

Question asked by audiolab1 on May 10, 2012
Latest reply on Jan 10, 2013 by BrettG

I have a general question regarding the SigmaDSP GPIO ports which came up as I was thinking of new designs. In the ADAU1701 we have 12 GPIO ports but only 4 of them can be configured as ADC inputs. If I had a design that required parameter control using 8 analog, linear pots as the control sources, what would be the best way to add the additional 4 ADC functionality? I would ideally like to stay away from using rotary encoders or an external micro, although I might reconsider if it's the only option.

 

Thank you!

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