4.3.1 Crystals

The SAM V71 Xplained Ultra kit contains two crystals that can be used as clock sources for the SAM V71 device. The crystals have cut-straps next to them that can be used to measure the oscillator safety factor. This is done by cutting the strap and adding a resistor across the strap. Information about oscillator allowance and safety factor can be found in the Atmel application note AVR4100, information about clock calibration and compensation can be found in the Atmel application note AT03155.

Table 4-19. External 32.768kHz Crystal
SAM V71 pinFunction
PA07XIN32
PA08XOUT32
Table 4-20. External 12MHz Crystal
SAM V71 pinFunction
PB09XIN
PB08XOUT
Info: The 12MHz crystal selected for the SAM V71 Xplained Ultra evaluation kit has a load capacitance outside the specification from the ATSAMV71Q21 datasheet, see the errata section for more information.