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  1. I have had these microcontrollers from Digilent for some time but have never needed the Vref+ pin until now. From my understanding, it should be on the ADC or somewhere near it on the PIC32 pins. I have tried looking through the datasheets and have only found that pin42 on the UC32/IO-shield is the correct pin for the Vref+. I also tried calling and had recieved no help there. Can anyone help me locate the Vref+ pin as I am using this as the reference input to the micro-controller. The board is a PIC32MX340f512h