The first section of this application note provides the basics of DC (Direct Current) and Servo motors.The successive sections explain the implementation of code drivers using the
MPC5604B MCU. The electronic circuits created to control these motors and schematics for PCBs, tips to reduce noise over important signals can also be found in this application
note.
A DC motor is an electrical device that converts energy into rotational movement. The motor moves a gear in one direction if current flows through the terminals (clockwise or counterclockwise),
and in the opposite direction if current flows backwards through the same terminals. If there is a force opposing the motor, then the terminals are short circuited and
the current through the terminals can go as high as 5 A or more. The voltage or current that must be delivered to the motor to work is too much for a microcontroller output port so
an intermediary device must be used. In this application note, the Freescale H Bridge – MC33931VW is used.