This processor-based reference design facilitates a quicker time to market and helps customers design cost-effective: human machine interface (HMI) solutions for protection relay. This reference design showcases a two-dimensional (2-D) Qt graphical user interface (GUI): which is typical for protection relay HMI: along with TI processor capabilities for software rendered graphics. The AM335x processors provide scalability by offering a range of processing speeds and using the same software development environment to satisfy low- to high-end applications as well as ample connectivity with the key peripherals required for protection relay HMI: such as universal asynchronous receiver/transmitter (UART) and CAN.