Yes, I know about the converse, changing duty cycle to obtain a desired output using an RC filter, it was the digital to analog I was interested in. And unfortunatedly, I am limited to a specific pin (A.0) if I am in need of only 1 analog output.
In a configuration table a port pin can be configured for Vref+ and Vref-. If I have configured for an internal Vref (5V), will that set the pin to 5V?