Interfacing Microchip's MCP41XXX and MCP42XXX Digital
Potentiometers to Motorola?s 68HC12 Microcontroller
The MCP41XXX and MCP42XXX family of digital potentiometers communicate using a standard 3-wire SPI compatible interface. This application note will cover communication between these devices and the Motorola 68HC12 family of microcontrollers. Specifically, the MC68HC912B32 evaluation board was used.