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Figure 59-6. External Analog Reference Schematic With One Reference
GND
VREFA
EXTERNAL
REFERENCE
4.7μF 100 nF
GND
VREFB
Close to device
(for every pin )
GND
VREFC
Table 59-1. External Analog Reference Connections
Signal Name Recommended Pin Connection Description
VREFx 1.0V to (V
DDANA
- 0.6V) for ADC
1.0V to (V
DDANA
- 0.6V) for DAC
Decoupling/filtering capacitors
100nF
(1)(2)
and 4.7µF
(1)
External reference VREFx for the analog port
GND Ground
1. These values are only given as a typical example.
2. Decoupling capacitor should be placed close to the device for each supply pin pair in the signal group.
59.4 External Reset Circuit
When the external Reset function is used, connect the external Reset circuit to the RESET pin as shown
below. If the external Reset function is not required, the circuit is not necessary: the RESET pin can either
remain unconnected, or be driven LOW externally by the application circuitry.
The Reset switch can also be removed if a manual Reset is not necessary. The RESET pin itself has an
internal pull-up resistor, hence it is optional to add any external pull-up resistor.
SAM D5x/E5x Family Data Sheet
Schematic Checklist
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 2101