Datasheet

59.6.1 External Clock Source
Figure 59-8. External Clock Source Schematic
XOUT/GPIO
XIN
NC/GPIO
External
Clock
Table 59-3. External Clock Source Connections
Signal Name Recommended Pin Connection Description
XIN XIN is used as input for an external clock signal Input for inverting oscillator pin
XOUT/GPIO Can be left unconnected or used as normal GPIO NC/GPIO
59.6.2 Crystal Oscillator
Figure 59-9. Crystal Oscillator Schematic
XOUT
XIN
26pF
26pF
The crystal should be located as close to the device as possible. Long signal lines may cause too high
load to operate the crystal, and cause crosstalk to other parts of the system.
Table 59-4. Crystal Oscillator Checklist
Signal Name Recommended Pin Connection Description
XIN Load capacitor 26pF
(1)(2)
External crystal between 8 to 48MHz
XOUT Load capacitor 26pF
(1)(2)
1. These values are only given as a typical example.
2. The capacitors should be placed close to the device for each supply pin pair in the signal group.
59.6.3 External Real Time Oscillator
The low frequency crystal oscillator is optimized for use with a 32.768kHz watch crystal. When selecting
crystals, load capacitance and the crystal’s Equivalent Series Resistance (ESR) must be taken into
consideration. Both values are specified by the crystal vendor.
SAM D5x/E5x oscillator is optimized for very low power consumption, hence close attention should be
made when selecting crystals.
SAM D5x/E5x Family Data Sheet
Schematic Checklist
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 2103