How to Wake-up Fast From an External Event on Cortex M0+ Based MCUs

PublishTime： 2021-11-24 Manufacturer： Microchip Type： Application note & Design Guide Language： English

Microchip’s 32-bit Arm® Cortex®-M0+ based microcontrollers provide features to reduce power consumption through different sleep modes, such as Idle, Standby, Backup and Off. When entering into sleep modes, the CPU is stopped,and some modules and clock domains are automatically switched off according to the selected Sleep mode. External events, such as interrupts from the ADC, RTC, DMA, and others can then be used to wake up the CPU and go back to Active mode.
Waking up the device from Sleep mode is not immediate and can differ according to the sleep modes, clocks, and peripherals used in the application.
This document describes wake-up time and how to configure the device to optimize the wake-up time. It also includes an appendix that describes a method to be used to measure the wake-up time.

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