The large number of I/O pins available in the Altera programmable devices make them ideal for implementing microcontroller I/O expansion. For example, with 500 I/O pins, you can implement 62 units of 8 bit ports.
If you made your own board, post here, unless you built a Maple or Maple mini clone etc
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I read that AN but forget it... may be an interesting example...Rick Kimball wrote: ↑Fri Oct 20, 2017 7:57 pm"AN 265: Using Altera MAX Series as Microcontroller I/O Expanders"
https://www.altera.com/documentation/sa ... 05644.html