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Altera_Forum
Honored Contributor I
1,299 Views

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 ?

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3 Replies
Altera_Forum
Honored Contributor I
77 Views

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
Honored Contributor I
77 Views

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
Honored Contributor I
77 Views

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
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