tinyAVR 8-bit Microcontroller

12.3.2.1 Reset Sources

There are two kind of sources for Resets:

Power supply Resets, which are caused by changes in the power supply voltage: Power-on Reset (POR) and Brownout Detector (BOD).
User Resets, which are issued by the application, by debug operation or by pin changes (Software Reset, Watchdog Reset, UPDI Reset and external Reset pin RESET).

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