Atmel SAM C21 Xplained Pro User Manual

Table 4-9 VCC_SEL Header
VCC_SEL header pin Function
1 VCC_P5V0
2 VCC_TARGET
3 VCC_P3V3
4.2.4. VREF Header
SAM C21 Xplained Pro has a 6-pin header labeled VREF on the board. This header can be used to
select / apply a voltage reference to the ADC, DAC, and SDADC. Jumpers can be used to tie SADC
VREF and ADC/DAC VREFT to the kit target voltage from pin 1-3 and 2-4, or external voltages can be
applied across pin 3-5 and 4-6.
Table 4-10 VREF Header
VREF header pin Pin / Net Function
1 VCC_AREF_P3V3_P5V0 Filtered kit target voltage
2 VCC_AREF_P3V3_P5V0 Filtered kit target voltage
3 PA04 SDADC voltage reference
4 PA03 ADC / DAC voltage reference
5 GND Ground
6 GND Ground
4.2.5. DAC Header
SAM C21 Xplained Pro has a 2-pin header labeled DAC-OUT on the board that is connected to the DAC
output of the ATSAMC21J18A and ground.
Table 4-11 DAC Header
DAC header pin Pin / Net Function Shared functionality
1 PA02 DAC0 output EXT3
2 GND Ground
4.2.6. Current Measurement Header
An angled 1x2, 100mil pin-header marked with MCU current measurement is located at the upper edge of
the SAM C21 Xplained Pro. All power to the ATSAMC21J18A is routed through this header. To measure
the power consumption of the device remove the jumper and replace it with an ammeter.
Caution: Removing the jumper from the pin-header while the kit is powered may cause the
ATSAMC21J18A to be powered through its I/O pins. This may cause permanent damage to the
device.
4.2.7. Cortex Debug Connector
SAM C21 Xplained Pro has a 10-pin 50-mil Cortex
®
Debug Connector that can be used to attach external
debuggers to the ATSAMC21J18A.
Atmel SAM C21 Xplained Pro [USER GUIDE]
Atmel-42460C-SAM C21 Xplained Pro_User Guide-10/2015
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Atmel SAM C21 Xplained Pro Specifications

General

Brand	Atmel
Model	SAM C21 Xplained Pro
Category	Motherboard
Language	English