Abstract: The remote control and other low-power devices use the internal low-speed oscillator as the sub-clock. When the chip sleeps, only the internal low-speed oscillator can run, and the accuracy of the internal oscillator of the chip is very low. If the timing function is set on the remote control, the timing accuracy also low, affects the user's use, therefore, proposed a method of using the internal high-speed oscillator to calibrate the internal low-speed oscillator, to improve timing accuracy.

Key words: Remote control, Low power consumption, Timing calibration