This library allows you to use the low power features of the SAMD21 MCU. This means your battery-powered projects will have a longer battery life on boards like MKRZero, MKR1000, MKRFox1200, MKR WAN1300, MKR WAN 1310 and MKR NB 1500.
In these pages, the term companion chip is used. This term refers to a board co-processor like the MIPS processor on the Arduino Tian.
Corrections, suggestions, and new documentation should be posted to the Forum.
The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.