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Question: How to I select the Reference for my ADC in PSoC Designer?
You have the choice of selecting a reference from the following options:
VCC / 2 +/- BandGap
VCC / 2 +/- VCC / 2
BandGap +/- BandGap
1.6 * BandGap +/- 1.6 * BandGap
2 * BandGap +/- BandGap
2 * BandGap +/- P2
P2 +/- BandGap
P2 +/- P2
You can select these in Global Resources section in PSoC Designer and the options vary from device to device. The range of the ADCINC is set at ±VRef. For fixed scale, VRef is set to VBandgap, or 1.6 VBandgap. For adjustable scale, VRef is set to Port 2. For supply ratio metric scale, VRef is set to VDD/2.