Interfacing Microchip's MCP41XXX/42XXX Digital Potentiometers to a PICmicro Microcontroller
Craig L. King, Ezana Haile
The MCP41XXX and MCP42XXX family of digital potentiometers communicate using a standard 3-wire SPI? compatible interface. This application note will discuss communications between these devices and a PIC16F876 microcontroller. The code supplied with this application note will include both absolute and relocatable assembly code, written for both hardware SPI and firmware SPI implementations.
Potentiometer, Digital potentiometer, MCP4XXXX, Interfacing PICmicro controller, SPI, PIC16F876