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dfergenson

Recommended Protection Circuit for Cmod A7

Question

I'm preparing to embed a Cmod A7 on a PCB and I want to provide similar circuit protection for some of its pins to those found on a Pmod output. I looked at the schematics for the Basys3 and found a 200 Ohm series resistor on each output pin and a zener diode directly from pin to ground. I  have two concrete questions:

1. Just to confirm, the Zener voltage should be 3.4V, right?

2. What power does Digilent recommend for the 200 Ohm resistor?

Thanks.

-David 

Screen Shot 2019-01-02 at 10.34.00 AM.png

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