--- Quote Start ---
I just acquired a Max V Development board to learn programming on CPLDs. I've already made some headway and have managed to utilize the push buttons and LEDs. I was thinking of utilizing the GPIO headers to interface with a AVR Mega 168. My question is, how can I supply power to the AVR from the board?
--- Quote End ---
You should be able to power the AVR board and CPLD boards independently, eg. from their respective USB connectors (if that is how they are normally powered).
All you really need to do is to connect the signals on the GPIOs on the respective boards, and connect a few ground pins.
The ground pins establish the common reference, and provide a path for return currents. You might be able to get away without the ground, if both boards are being powered from a single computer, however, its would be a good idea to connect grounds on the respective GPIO connectors.
Cheers,
Dave
Honored Contributor
