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0021-2020-05-24.md

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24 May 2020

No journal updates for last 4 months: Personal time was mostly taken up by work or projects for friends.

Getting into FPGAs

I'm going to finally study programmable logic and FPGAs.

CPLD board design

  • I'm going to try copying the DP CPLD board; it's a 5V-tolerant part so it could be used with the NES project I was working on a while back.
  • Beware: the original CPLD board's schematics have a bug on IO3-8.
  • A while back I'd ordered a couple of XC9572XL-10VQ64 ICs (64-pin version as opposed to the CPLD board's 44-pin version). Basic datasheet mostly shows pinouts for various packages. Family guide has more about the XC9500 range and how to use it.
  • Ian Lesnet's assembly video might be handy.