AVR1925: XMEGA-C3 Xplained Hardware User’s Guide [APPLICATION NOTE]
Atmel-42053B-XMEGA-C3-Xplained-Hardware-Users-Guide_Application-Note_AVR1925_02/2015
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2.
General Information
The Atmel AVR XMEGA-C3 Xplained kit is intended to demonstrate the Atmel AVR ATXmega384C3 microcontroller.
shows the available feature on the board.
Figure 2-1. Overview of XMEGA-C3 Xplained Kit
2.1
Preprogrammed Firmware
The ATxmega384C3 on the XMEGA-C3 Xplained is pre-programmed with a boot loader and a default firmware. The
detailed description of the software is available in the AT01639 XMEGA-C3 Xplained Software User Guide.
2.2
Power Supply
The kit needs an external power supply that can deliver 5V and up to 500mA. The actual current requirement for the
board is much less than 500mA but in order to be able to power optional expansion boards this margin is
recommended.
The power can be applied to the board either via the USB connector or on pin 10 on the header J3. The USB connector
is the preferred input because it is then possible to connect expansion boards on top of the J3 header.
The 5V (USB supply voltage) is regulated down to 3.3V with an onboard LDO regulator, which provides power to the
entire board. Expansion top boards that require 5V will get this from the header J3 pin 10.
2.3
Measuring the Atmel AVR XMEGA Power Consumption
As part of an evaluation of the ATxmega384C3, it can be of interest to measure its power consumption. Because the
XMEGA has a separate power plane (VCC_MCU_P3V3) on this board it is possible to measure the current
consumption by measuring the current that is flowing into this plane. The VCC_MCU_P3V3 plane is connected via a
jumper to the main power plane (VCC_P3V3) and by replacing the jumper with an amperemeter it is possible to
determine the current consumption. To locate the power measurement header, refer to
