XMEGA A4U DIP adapter.

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#1
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http://dangerousprototypes.com/2012/01/25/breakout-board-for-the-44pin-qfn-atxmega-microcontroller/
Appear to be Eagle files (schematic, board).
I did not review these (no Eagle install).

"Dare to be naïve." - Buckminster Fuller

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I've done a similar thing:

Mine's got a PDI header and some USB protection, however the pin layout is geared towards contiguous port pins rather than mimicking the little Arduinos.

Long live breadboard development!

Nigel Batten
www.batsocks.co.uk

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Wow that looks nice - have you considered selling those? (one day I'd like to get some Xmega experience and the arrival of the U chips may be the final push I need)

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Condemed, I agree with Cliff, that looks very nice.

It doesn't look to be hand soldered.

Just curious, how do you assemble them?

JC

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Yup - they're already on sale! (the image above should link to the page).
I also do a non-USB variant with the vanilla XMega32A4.
£12.50 USB, £9.50 vanilla.

I really like these XMegas. A usefully accurate 32Mhz onboard oscillator, 4kb RAM, flexible I/O, multiple interrupt levels, onboard DAC. A nice step-up from the Megas for those who have PDI-capable programmers and their sights set at 3.3v rather than 5v.

@JC, They're stencilled, hand-populated and then reflowed on my super-advanced reflow equipment (an old iron, tweaked to allow slightly higher temperatures).

[ninja-edit: got the prices wrong!]

Nigel Batten
www.batsocks.co.uk

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Cool. I love the Xmega's but hand soldering them continues to be a challenge for me. Unfortunately, I never need a more than a couple of whatever I build.

JC

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Just ordered one with Paypal :-)

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DocJC wrote:
hand soldering them continues to be a challenge for me
You should consider using solder paste and an iron/skillet. I've got a syringe of paste for one-offs; it's not quick, but it works and is relatively forgiving. TQFPs can be done with 4 thin lines of paste across the pads (possbily mopping up excess solder with solderwick afterwards) There's something almost magical watching all the components wriggle and settle into place through the power of surface tension.

Nigel Batten
www.batsocks.co.uk

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Hate to go too far off topic...

It took me a long time to switch from Through Hole to SMD. Now I don't know what to do with all my old TH parts.

I have a skillet to use. I will have to re-read some threads about which paste to use, syringe needles, etc.

Perhaps I'll give it a try on my next PCB.

JC

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condemned,

BTW I assume the chip comes with DFU pre-installed? My JTAGICEmkII is too old to do PDI I believe and while I think my Dragon will be able to, using it can often be "fraught" so a bootloader might be the easiest option (making it very Arduino like!)

Cliff

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I'm afraid it comes as blank as the naked XMega32A4U :(

Had I not already posted your order, I'd have put it on there for you - I'm just too efficient :oops:

Is the dragon not a good tool to use with XMegas then? I've been pondering an upgrade from the AVRISPmk2?

@JC,
I use solder-paste from DealExtreme, SKU4711 or SKU7952 and just bought a bunch of syringes and applicator nozzles from eBay - I found the nozzles better than the blunt needles. Depending on the thickness of the paste, you may need to thin it slightly with liquid flux of some sort.

Nigel Batten
www.batsocks.co.uk

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Quote:

I'm afraid it comes as blank as the naked XMega32A4U

Really? Atmel don't preload DFU?

Gun.. Foot.. BANG!

(no worries I'm sure I'll make the Dragon work - it's not that I don't like the Dragon - it's just I have a JTAGICEmkII so use that for more things because it's less likely my ham fisted, minor knowledge of electronics will lead to me blowing the thing up!)

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Here is my $2.50 XMega256 rig...

I used to fear soldering a TQ144,TQ100, or even a TQ64, but in reality it is easy once you try. Just place the tip at the start of the copper pad and run it towards the IC pin, letting the liquid solder wick into the pad and pin.

Takes no more than 15 minutes to drop down a 100 pin package, and normally my clunky hands prefer a large hammer and a welding torch!

Brad

No Fate But What We Make!

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My Dragon (about a year old) works fine with an XMega32A4U. It seems to automatically detect PDI mode.

Russ

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clawson wrote:
condemned,

BTW I assume the chip comes with DFU pre-installed? My JTAGICEmkII is too old to do PDI I believe and while I think my Dragon will be able to, using it can often be "fraught" so a bootloader might be the easiest option (making it very Arduino like!)

Cliff

Cliff, my JTAGICEmkII does PDI with no problem. Unless of course you don't feel like firmware upgrading them or have tossed your squid cable away.

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Quote:

Cliff, my JTAGICEmkII does PDI with no problem.

Then it's not a model A?

http://support.atmel.no/knowledg...

Quote:
Note: Not all JTAGICE mkII units have PDI capabilities. To check whether your JTAGICE mkII is PDI capable, look for the following:

* Serial number on underside starts with B0...
* Green LED lights inside the encapsulation when a USB connection is made


BTW my board from Batsocks arrived this morning. Thanks Nigel.