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Batsocks

You could get by without us.

DiscontinuedBreadMate AV XMega PDI

An open-source, breadboard-friendly, DIL format, USB XMega A4 board

This simple open-source board brings all the I/O pins of the XMegaA4 out to your breadboard.
An onboard Micro-USB socket provides power (via an onboard 3.3v LDO voltage regulator).
An onboard 3.5mm socket allows Video or Audio signals, generated by the XMega, to be output. All parts except the header pins are pre-soldered, fully tested, and ready to go!

The board has been designed to keep port pins together and all the I/O pins have been brought out to clearly labelled headers.

Note: We're supplying these boards with Atmel's DFU bootloader pre-programmed. This means that Atmel's FLIP utility can be used to program the board via USB. The bootloader is run if pin C3 [marked] is grounded when the board is powered up (we still recommend that you've got a PDI programmer around though!).

This version of the board has the same features as the USB board, plus the following pre-soldered:

• Tiny (2.5mm x 3.5mm) 16Mhz crystal
• 3.5mm socket
• components suitable for monochrome composite video output
• components suitable for high-impedance audio output

 

Open-Source Hardware

Hardware design (schematics and board) are available below.

 

Documentation

• Schematic (pdf)
• Board Layout (pdf)
• Eagle files (zip)
• Atmel's XMega32A4U product page
• Atmel's XMega128A4U product page

 

Included

• PCB with all surface-mounted components soldered on.
• 2 x 18-way header pins (not soldered)
• 2x3 Header pins for PDI (not soldered)
• Mono 3.5mm jack to RCA/Phono cable

You will need to supply the following:

• Soldering equipment to attach the header pins
• Breadboard
• USB-micro cable
• A PDI capable programmer (AVRISPMk2, USBTiny mkii etc.)

 

Getting started

Solder the header pins on. Plug into your breadboard. Connect a Micro-USB lead (for power). Connect your programmer. Go!
For video output^*, plug in the (supplied) lead.
For audio output^*, you'll need to cut (SJ6,SJ7) and short (SJ8, SJ9)

Note: * To actually generate video and audio signals, software will need to be uploaded onto the XMega!

We've got a page with some XMega examples, which includes suitable video and audio demos.

Technical stuff

Pads for an optional 'power on' LED + resistor (not supplied) are available (both 0603).

Jumper settings:

Jumper Name	default	description
SJ1	connected	connects Vcc to AVcc
SJ2	connected	connects USB 5v to the VReg input
SJ3	not connected	connects header pins D6/D7 to the XMega's PD6/PD7
SJ4	connected	connects USB D+/D- to the XMega's PD6/PD7
SJ5	connected	connects Vcc to the VReg output
SJ6	connected	connects PC7 (pixel output) to the 3.5mm socket
SJ7	connected	connects PC0 (sync output) to the 3.5mm socket
SJ8	not connected	connects PB3 (DAC1) to the 3.5mm socket (left)
SJ9	not connected	connects PB2 (DAC0) to the 3.5mm socket (right)

This board is designed to be powered via the Micro-USB header; the V_cc/AV_cc and Ground header pins should not normally be used to supply power - the onboard voltage regulator gets grumpy and hot if you do. The Voltage Regulator can be disconnected by cutting SJ2 and SJ5.

Excerpts from the Schematic:

Release History

Board v1
Initial release

Files

circuit schematics

Version	Date	File	Size
1.0	2012-06-15	sch_bm_pdi_av_10.pdf	81.3 kB

layout

Version	Date	File	Size
1.0	2012-06-15	board_bm_pdi_av_10.pdf	112.3 kB

eagle files

Version	Date	File	Size
1.0	2012-06-15	bm_pdi_av_10_eagle.zip	51.1 kB

example code

Version	Date	File	Size
1.0	2012-06-25	XMega_BleepingDemo_1-00.zip	11.7 kB
2.0	2012-06-24	XMega_XTV_2-00.zip	42.4 kB
1.0	2012-03-05	XMega_XTV_1-00.zip	22.0 kB