This disclosure is directed to techniques for automatically controlling a dual mode component of a device to operate according to a first mode or a second mode. According to these techniques, a device or circuit may include a first power supply input terminal and a dual mode component that includes a second power supply input terminal. The device or circuit further includes an automatic power supply selection module configured to compare a voltage level at the first power supply input terminal to a predetermined threshold, and based on the comparison, supply one of a first mode voltage level or a second mode voltage level to the second power supply input terminal. The first mode voltage level may cause the dual mode component to operate in a first mode, while the second mode voltage level may cause the dual mode component to operate in a second mode different than the first mode.
