I created this reference sheet for my BB313 board outlining all the alternate pin functions and descriptions. While I’ve pretty much got the pins memorized at this point (from constantly cross-checking with the ‘313 datasheet), I wish I’d thought of this earlier. The sheet is a single-page 8.5×11 PDF, so you can just print it out and keep it for reference at the workbench (or desktop). You can get the PDF, as well as all the project source files, at the GitHub project page.
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