Can the ADC accept input from multiple pins or can the ADC be switched around different pins during usage?
Use an analog MUX component? Or the Sequencing SAR ADC. Which device are we talking about specifically (the PSoC4000 series has no ADC, only 4100 upwards has)?
Oh wait. The 4000s has a scanning ADC: http://www.cypress.com/file/284231/download . Did never use it, though.
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