Brown-Out Detector - Atmel megaAVR Getting Started

megaAVR™ Starter Kit Manual
The brown-out detector circuit is used to detect voltage drops. If a short glitch occurs in
the power, this circuit ensures that the processor resets properly rather than operating
randomly.
The brown-out detector must be set to the same voltage as the circuit voltage, V
3.3V or 5V. For 3.3V operation, jumper JP2 must be removed (jumper open) and for 5V
operation it must be closed.
Voltage Operating Voltage
5 Volts 4.5 Volts
3.3 Volts 2.9 Volts
These values are approximate and may vary with temperature and other factors.

Brown-Out Detector

Hysteresis
200 mV
200 mV
Section 8
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CC
8-1