Method and MCU capable of further preserving and holding data

摘要

This method of operation of the microcontroller unit is started. Method of operation of the microcontroller unit comprising: maintaining the idle mode operation performed when a still mode operation is performed from the outside through the input of a first interrupt signal in response to the detected battery voltage level is a predetermined low voltage level range , and from the outside when the detected in response to a second interrupt signal input battery voltage level is greater than the highest voltage level of the predetermined low-voltage level range and a step of performing a normal operation corresponding to the second interrupt signal .