In SX Microcontrollers, SX/B Compiler and SX-Key Tool, darco wrote:

I got the fabbed board back, populated it, and... it works! ...for the most part.

It seems I'm running into some stability issues when I run off of the external crystal. Not a huge deal at the moment, because the internal oscillator is plenty fast for making pretty colors. Curiously, the external crystal DOES work when I have the SX-Blitz attached!  Hopefully this won't be a problem on the updated layout.

I've taken the advice I've read in this post and also my experience with the board I got back and come up with the following improved design. About the only advice I haven't taken is the advice about which side of the chip to put the SX Key port on, because it seemed to lead to a rather inconvenient layout. 

I plan on fabbing a few of these for presents for christmas. I'll be sending off the design early next week. (If anyone else wants a board as well, let me know and I'll add it to the batch. $15 is what it costs per board)

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