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Altera_Forum's avatar
Altera_Forum
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8 years ago

max10 clock

I am quite new in this, do max10 require external clocking ? Iam using 10M50DAF484C8G. If need which pins should be connected to external clock ?

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    MAX 10 devices do have an internal oscillator. So, you don't necessarily 'require' and external clock source.

    Refer to the 'max 10 clocking and pll user guide (https://www.altera.com/en_us/pdfs/literature/hb/max-10/ug_m10_clkpll.pdf)'.

    However, rather than rely on the internal oscillator most designs will use a, far more accurate, external clock source fed into one of the 'CLK[x]n/p' pins - refer to the device pinout files.

    Cheers,

    Alex
  • Altera_Forum's avatar
    Altera_Forum
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    hi a_x_h_75,

    Because I would like to adapt the 10M50SA (single power) other than 10M50DA in our next project, I would like to make it clear that (1) if SA (single power) series support internal oscillator?

    BTW, (2) could I use the PLL to cascade with the output of internal oscillator to generate my frequency?

    thanks for your help.
  • Altera_Forum's avatar
    Altera_Forum
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    1) The internal oscillator is supported in all MAX 10 devices.

    2) From the User Guide:

    --- Quote Start ---

    3.2.1 Guideline: Connectivity Restrictions

    You cannot drive the PLLs with internal oscillator.

    --- Quote End ---

    Cheers,

    Alex