Programming headers

The Atmel AT32UC3A3256 can be programmed and debugged by connecting an external programming/debugging tool to the “JTAG” pin header. The pin header has a standard JTAG programmer pin out (refer to online help in Atmel Studio), and tools like the JTAGICE mkII or the AVR ONE! can thus be connected directly to the header.

Note:

The grey female 10-pin header on the 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.
A standoff adapter (nr. 1) is needed when using the AVR One!
Pin 1 on the JTAG header is at the top right corner. This is 180° rotated compared to the other headers (J1, J2, J3, and J4).

Table 1. `UC3-A3 Xplained` programming and debugging interface
Pin	JTAG¹
1	TCK
2	GND
3	TDO
4	VCC
5	TMS
6	nSRST
7
8
9	TDI
10	GND

The Atmel^® - can be programmed through its bootloader. The bootloader is evoked by shorting the 2 holes marked BOOTLOADER BOARD CONTROLLER on the bottom side of the board before applying power to the board. The 2 holes have 100mill spacing, so the user can solder in a 2-pin header and use a jumper to easily enter the bootloader. Programming is performed through the bootloader programmer target in AVR32 Studio.

Alternatively, the Atmel - can also be programmed by connecting a programming tool, such as a JTAGICE mkII, to the 10 holes marked JTAG BOARD CONTROLLER on the bottom side of the board. The 10 holes have 100mill spacing, so the user can solder in a 10-pin header to program the boardcontroller.

Note:

Programming the Atmel - using a programming tool will erase the bootloader.