4.3.1 Crystals

ATmega4809 Xplained Pro has a 32.768 kHz crystal that can be used as clock source for the ATmega4809 device. There are cut-straps located close to the crystals that can be used to measure the oscillator safety factor. This is done by cutting the strap and adding a resistor across the strap. More information about oscillator allowance and safety factor is available in the AVR4100 application note.

There is a 7 pF, 32.768 kHz crystal in a 3.2 mm by 1.5 mm package mounted on ATmega4809 Xplained Pro.