User manual

Atmel AVR32918: UC3-A3 Xplained Hardware User’s Guide [APPLICATION NOTE]

32159C−AVR−07/2012

2.4 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) with FLIP.

How a programmer can be connected to the kit is described in Section 3.1.

3. 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 2-1.

3.1 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 Atmel Studio), and tools

such as JTAGICE3 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 3-1. UC3 programming and debugging interface - JTAG.

Pin JTAG

(1)

1 TCK

2 GND

3 TDO

4 VCC

5 TMS

6 nSRST

7 -

8 -

9 TDI

10 GND

Note: 1. Standard pinout for JTAGICE3 and other Atmel programming tools.

3.2 I/O expansion headers

There are four available I/O expansion headers on the kit. Some pins have shared functionality with onboard

functionality. If “clean” expansion ports are needed, there are available cut-straps on some of the ADC inputs to remove

onboard functionality. Table 3-2 to Table 3-5 show

what is shared on the header pins.