AN ULTRA LOW POWER APPARATUS AND METHOD TO WAKE UP A MAIN PROCESSOR

摘要

An apparatus and method for waking up a main processor (MP) in a low-power or ultra-low-power device uses a main processor, and a sub-processor that may use lower power than the main processor to monitor the surrounding environment and may be internalized in the main processor. Includes. The main processor and the sub-processor may be in a sleep mode while the interrupt sensor detects a change in the surrounding environment. The interrupt sensor detects a change in the surrounding environment, and when the sensed sensing data is changed to a predetermined condition, wakes up the subprocessor through an interrupt signal. Then, the sub-processor compares the pre-stored value with the data received from the interrupt sensor, or additionally uses another sensor value to determine whether the condition of the sensing data of the interrupt sensor should wake up the main processor. You can also wake up the processor.