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Altera_Forum's avatar
Altera_Forum
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16 years ago

DE2 crystal clock pulse

Hi All, I need to generate a square wave from the DE2 board. I already assigned the DE2 board internal, 50MHz clock to a NOT gate and its output to a GPIO pin and read using an oscilloscope. how...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

I assume, that most of the distortion is caused by your oscilloscope probe. Actually a 50 MHz squarewave can't be exactly acquired without an active probe or a resistive high frequency probe. In addition, the IO pin drive strength may be reduced to match the trace impedance.