4

AVR32918

32159A-AVR-01/11

connection between the common power plane VCC_P3V3 and the VCC_MCU_P3V3

power plane. By replacing the jumper with an amperemeter it is possible to determine

the current consumption of the Atmel AT32UC3A3256. To locate the power

measurement header, please refer to Figure 3-1.

WARNING

Do not power the board without having the jumper or an amperemeter

mounted. Otherwise, the device may be damaged.

3.4 Programming the kit

The kit can be programmed either from an external programming tool or through a

USB bootloader which is pre-programmed on the device.

The bootloader is evoked by pushing the push button (SW0) during power-on. I.e.

push button and then connect an USB cable to the kit. Programming can be

performed through the DFU target (bootloader programmer target) in the Atmel

AVR32 Studio.

How a programmer can be connected to the kit is described in Chapter 4.1.

4 Connectors

The Atmel UC3-A3 XPLAINED kit has five 10-pin, 100mil headers. Two headers have

a fixed communication interface (J1 and J4). One header has analog functionality

(J2), and the last header (J3) has general purpose digital I/O.

The 90° angled header is the JTAG programming and debugging header for the

AT32UC3A3256.

For the location of the respective headers, refer to Figure 3-1.

4.1 Programming header

The AT32UC3A3256 can be programmed and debugged by connecting an external

programming/debugging tool to the JTAG header. The header has a standard JTAG

programmer pinout (refer to online help in AVR32 Studio), and tools such as

JTAGICE mkII or AVR ONE! can thus be connected directly to the header.

NOTE

The grey female 10-pin header on JTAGICE mkII has to be used when connecting to

the kit. A scoring in the board is made to fit the orientation tab on the header.

NOTE

A standoff adapter (no. 1) is needed when using AVR ONE!.

NOTE

Pin 1 on the JTAG header is at the top right corner and is marked with a square pad.

Table 4-1. UC3 programming and debugging interface – JTAG.

Pin

JTAG

(1)

1

TCK

2

GND

3

TDO

4

VCC

5

TMS

6

nSRST

7

-

8

-