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• VDD1A18/VDD2A18 – Connect to VDD • VDDA2, VDDAIO – Connect to VDDIO • VSS1AGND/VSS2AGND, VSSA2, VSSAIO – Connect to VSS • ADCLO – Connect to VSS • ADCREFIN – Connect to VSS • ADCREFP/ADCREFM – Connect a 100-nF cap to VSS • ADCRESEXT – Connect a 22-kΩ resistor (very loose tolerance) to VSS • ADCINAn, ADCINBn - Connect to VSS When the ADC is not being used, disable the clock to the ADC module to save power.
