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Altera_Forum's avatar
Altera_Forum
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8 years ago

Reduce clock frequency when system clock is dynamic

Hi, I would like to know a method to divide the clock to a certain frequency. I am aware of different methods of clock divider but the thing here is that the on-board system clock is dynamic (not fix...
Altera_Forum's avatar
Altera_Forum
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8 years ago

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update: Itappears the 5m160ze64 part you are using has an internal oscillator in the UFM block with an output that can range from 3.9 to 5.3 MHz. The exact frequency is not programmable, it will vary from device to device, and over temperature and voltage. So it could conceivably be used as an (internal) reference, assuming you can live with the frequency variation.

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Thanks! Could you give a reference about frequency variation of the UFM oscillator, so I can read more about it? I found the details about 3.9-5.3 MHz, but not about not being programmable and the frequency variations. Also is the internal oscillator in the UFM block the only oscillator option for 5m160ze64 or does it consist of another on-board oscillator?