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5741 Discussions

Detail of AN-661 (Connecting Altera PLL and PLL Reconfig IP Core)

watari
Beginner
934 Views

Hi community member

 

I'd like to know more detail about "Fractional PLL Dynamic Reconfiguration Registers and Settings" at Table 2 on page 4 in AN-661.

 

This application note shows some detail. But ,for example, I can not find the description of bandwidth setting, charge pump settings and so on.

 

Could you help me ?

 

Best regards,

0 Kudos
7 Replies
JonWay_C_Intel
Employee
157 Views

For BW settings, you can select the BW = low/medium/high within the calculator and the suitable hex value will be provided in the calculator. You will need to reconfigure the PLL based on the new hex value to achieve the specified BW.

JonWay_C_Intel
Employee
157 Views
watari
Beginner
157 Views

Hi JwChin

 

Thank you for your reply.

 

I tried to use this excel file to calculate PLL parameters.

 

I want to set different value between Low Count and High Count on M counter.

However, I could not set it on this excel even if "Odd Division" is yes.

 

How do I calculate PLL parameter with my required ?

 

Thanks a lot,

Best regards,

 

JonWay_C_Intel
Employee
157 Views

Hmmm.....I am able to set it from the drop down list.

What value do you want to set for M counter high/low?

What error message are you seeing?

Can you send me your excel file?

watari
Beginner
157 Views

Hi JwChin

 

Thank you for your reply.

 

> What value do you want to set for M counter high/low?

 

I'd like to set for M counter high as 5 and low as 4.

 

> What error message are you seeing?

 

I didn't see any error message.

I could not only select different counter div. between high and low.

 

> Can you send me your excel file?

I downloaded excel file from this URL.

 

Download the calculator: https://www.intel.com/content/dam/www/programmable/us/en/others/literature/an/pll_reconfiguration_ca...

 

Thanks a lot

Best regards,

 

 

 

JonWay_C_Intel
Employee
157 Views

Hi watari,

 

Im sorry the delayed response. I downloaded the excel from the same link as well.

I am able to set it as screenshot.

I am not sure if this is an Excel issue on your PC. Would you be able to try on a different PC?

forum_pllreconfig.PNG

JonWay_C_Intel
Employee
157 Views
Hi watari, I havent heard back from you. If you need further assistance, please reopen/file new thread referring to this thread.
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