[sdiy] dsPIC with on-chip audio DACs

[Eric Brombaugh]

On Jul 5, 2008, at 10:35 AM, Tom Wiltshire wrote:

> On 5 Jul 2008, at 11:06, Seb Francis wrote:
>
>> Shame the ADC isn't quite up to audio spec (max 12-bit  
>> resolution).  Still fine for CV control (up to 10 CV inputs!), and  
>> actually probably useable for the sort of audio one normally gets  
>> within a modular.
>
> Note that the DAC pins are also ADC inputs, so if you use the DAC  
> output, you only get 6 CV inputs, at least on the 28 pin DIP version  
> (which is the DIY-friendly one).

Yeah - unfortunately they haven't yet figured out how to handle the  
analog I/O in the peripheral pin selection feature. That's a new  
capability that allows you to assign most digital I/O functions to  
almost any pin on the chip. It really opens things up when you're  
doing the hardware design.

Out of curiosity, what were you doing that needed >6 CV inputs? I  
suppose you could have put on an external analog mux, but that takes  
additional digital I/O to control.

> I was a bit miffed about this. 10 CV inputs would have been nice.  
> However, I'm all growed up these days and I got over it all by myself.

Be strong, or use an SMD version of the part. :)

Eric