Atmel XMEGA-A1 Xplained Evaluation Board ATAVRXPLAIN ATAVRXPLAIN Hoja De Datos
Los códigos de productos
ATAVRXPLAIN
Atmel AVR1924
3
8370C-AVR-12/11
The preprogrammed Atmel AT32UC3B1256 firmware offers features such as a boot
loader for self-programming and a UART-to-USB gateway.
loader for self-programming and a UART-to-USB gateway.
3.2 Power supply
The kit is powered via the USB connector, which leaves two options to power it:
Connect the kit either to a PC through a USB cable, or to a 5V USB power supply
(AC/DC adapter).
Connect the kit either to a PC through a USB cable, or to a 5V USB power supply
(AC/DC adapter).
3.3 Measuring the XMEGA power consumption
As part of an evaluation of the Atmel ATxmega128A1, it can be of interest to measure
its power consumption. The power jumper (J300) is connected between the 3.3V
regulated voltage from the regulator and the ATxmega128A1 supply. By replacing the
jumper with an ammeter, it is possible to measure the current consumption of the
ATxmega128A1. No other components are connected to the same supply as the
ATxmega128A1, and other components, therefore, do not affect the measurement of
the ATxmega128A1 current consumption (except the DC leakage in the decoupling
capacitors).
its power consumption. The power jumper (J300) is connected between the 3.3V
regulated voltage from the regulator and the ATxmega128A1 supply. By replacing the
jumper with an ammeter, it is possible to measure the current consumption of the
ATxmega128A1. No other components are connected to the same supply as the
ATxmega128A1, and other components, therefore, do not affect the measurement of
the ATxmega128A1 current consumption (except the DC leakage in the decoupling
capacitors).
3.4 Programming the XMEGA through the UART-to-USB gateway
The ATxmega128A1 has a pre-programmed UART boot loader. How to program the
device through the UART-to-USB gateway is described in the Atmel application note
“
device through the UART-to-USB gateway is described in the Atmel application note
“
”.
3.5 Communication through the UART-to-USB gateway
The XMEGA UARTC0 is connected to a UART on the AT32UC3B1256. The
AT32UC3B1256 UART is communicating at 115200 baud, using one start bit, eight
data bits, one stop bit, and no parity.
AT32UC3B1256 UART is communicating at 115200 baud, using one start bit, eight
data bits, one stop bit, and no parity.
When the AT32UC3B1256 device is enumerated (connected to a PC), the data
transmitted from the XMEGA is passed on to a (virtual) COM port. This means that it
is possible to use a terminal program to receive the transmitted data on a PC.
Similarly, data transmitted from the PC COM port is passed on to the XMEGA UART
through the gateway.
transmitted from the XMEGA is passed on to a (virtual) COM port. This means that it
is possible to use a terminal program to receive the transmitted data on a PC.
Similarly, data transmitted from the PC COM port is passed on to the XMEGA UART
through the gateway.
NOTE
The AT32UC3B1256 is also connected to the shared SPI and TWI lines, and so it is
also possible to add TWI and SPI gateway functionality for these serial interfaces, if
desired. This gateway functionality is not available in the default firmware for the
AT32UC3B1256. Please refer to the schematics for more information about these
connections.
also possible to add TWI and SPI gateway functionality for these serial interfaces, if
desired. This gateway functionality is not available in the default firmware for the
AT32UC3B1256. Please refer to the schematics for more information about these
connections.