https://www.analog.com/en/resources/technical-articles/picing-the-max5581-interfacing-a-pic-microcontroller-with-the-max5581-fastsettling-dac.html
PIC'ing the MAX5581: Interfacing a PIC Microcontroller with the MAX5581 Fast-Settling DAC | Analog...
How to use PIC microcontroller in conjunction with the MAX5581. Detailed schematics and source code are provided.