IO Expansion Documentation

[reynolds087]

I am interested in expanding the IO in my project because I've run out of pins, and would like to know where I can find documentation about this. Also, if you can recommend a chip to use or a class of chips that would be suitable, it would be greatly appreciated. I already have a custom board that I'm using with darlington arrays to drive the output signals, but my thought is possibly replacing those with the IO expansion chips, assuming they can drive 5v IO on the output side.

[bdring]

The 6 Pack controller uses output pin expansion. See that design and the machine definition files.

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