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Altera_Forum
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9 years ago

Clock Pin Input Requirements (Crystal OK? MAX10 specifically)

Hello all, Is it possible to use a crystal as the external clock source instead of an oscillator? I'm building a design based off the MAX10, and the evaluation board uses the CB3LV-3C-50M0000 5...
Altera_Forum's avatar
Altera_Forum
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9 years ago

Simple answer is no, not possible. The clock inputs are all logic level inputs. Driving / receiving a discrete crystal requires special I/O circuitry which is not present.

Theoretically you could put a power switch on your oscillator to turn it off when you are not using it (ie, in some kind of sleep mode) but in the overall scheme of things the power dissipation of the oscillator is minimal compared to that of the MAX10 FPGA.