3.2.4 32.768 kHz Crystal

The VMK3-9002-32K7680000 is a 32.768 kHz crystal accurate to within 20 ppm. Using the External 32.768 kHz Crystal Oscillator (XOSC32K) module in AVR128DB48 with the mounted 32.768 kHz crystal generates a clock signal that is significantly more accurate than what the internal OSC32K module can generate alone. With the AVR128DB48’s Auto-Tune feature, the external crystal can be used as a reference to improve the accuracy of the internal high-frequency oscillator, which is also an ideal reference clock for the Real-Time Counter module in the AVR128DB48.