[sdiy] Atmel ATxmega32A4 (and 64A4, etc.)

[Joe Grisso]

On Sat, Feb 12, 2011 at 2:25 AM,  <lanterma at ece.gatech.edu> wrote:
> Anyone played with these recently? The built-in 12-bit DACs are attractive.
> (I recall the XMEGA line coming up several times on the list).

The xmega series is quite an awesome processor. I've been using the
128A1 for my touch sequencer project, and it's definitely lived up to
my expectations. One word of caution: The DAC module will have up to
20mV of low-end offset for the processor. While the converters are not
as nice as dedicated ones (INL of 5 LSB, having to manually trim or
auto-calibrate the output offset with bipolar supplies), they
definitely do well for most average musical applications. The other
peripherals on-board are really awesome too. I found myself making
heavy use of the internal event system to off-load the processor for
things that aren't data intensive while freeing up the DMA controller
to do its proper job.

Best,

-- 
Joe Grisso
Detachment 3, Ltd.