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Luckyguide's avatar
Luckyguide
Icon for New Contributor rankNew Contributor
9 months ago

Output Voltage Higher than Maximum Voltage of GPIO

Dear all, I have written a code that sends out a PWM signal with a duty cycle of 50% at 12.5 MHz. I am using the DE10-Lite board with the MAX 10 FPGA and Quartus 23.1.1 software on Windows 11. When ...
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Mikexx's avatar
Mikexx
Icon for Occasional Contributor rankOccasional Contributor
9 months ago

I presume the signals are not terminated? I would also keep an open mind over the integrity of measurement in terms of probe and 'scope. Do you have a reference signal on the board to compare with?

Do you really mean either 8 or 4 Amps? How are you measuring this current? Can you elaborate on the context of this current?

Is the Max10 device output limited by protection diodes that don't clam to your 3.3V VCC? In which case 4.7V is quite realistic on account of a reflection. How long is the trace?

Does the Max10 have an internal source resistance capability? Can you load the PWM output at the signal destination?