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Altera_Forum's avatar
Altera_Forum
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17 years ago

PLL reconfiguration with NIOS

Hi

I'm working with a cyclone III FPGA with a NIOS. That NIOS is going to reconfigure a PLL via its Avalon bus.

My question is: Can the NIOS reconfigure a PLL generating the NIOS clock, and doing that without any problem during the frequency changing ?

Thank you for your answer !

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    17 years ago

    Thank you, I'm convinced.

    I am going to make the NIOS working on another fixed clock.
  • Altera_Forum's avatar
    Altera_Forum
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    17 years ago

    Sounds like cutting the branch you are standing on. Another similar scenario is updating remotely your only one or two firmware images at the customer premises by a new image that didn't work, there would be no way back.

  • Altera_Forum's avatar
    Altera_Forum
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    17 years ago

    Boy that sounds dangerous. Honestly I wouldn't even attempt it. Is there some reason you need to reconfigure the NIOS's clock? I would recommend running the NIOS off of a different clock that you are not going to modify.

    Jake