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KBhag3
Novice
327 Views

CLKUSR pin of Cyclone10

Hi,

 

I am using 2 transceiver channels of Cylcone 10. I have connected the CLKUSR pin to GND in my design. Is it a must to connect external clock to CLKUSR pin for the functionality of Transceiver section. I am operating at very low speed, around 1Gbps.

 

Best regards,

Bhagavath

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3 Replies
AnandRaj_S_Intel
Employee
110 Views

Hi Bhagavath,

 

Yes, as per pin connection

This pin is used as the clock for transceiver calibration and is a mandatory requirement when using transceivers.

 

Regards

Anand

KBhag3
Novice
110 Views

Dear Anand,

 

Thanks for your response.

 

As I am not in a position to re-spin the PCB, please let me know if there is any option to use transceivers with CLKUSR pin connected to GND.

Best regards,

Bhagavath

AnandRaj_S_Intel
Employee
110 Views

Hi Bhagavath,

 

No, We've to use CLKUSR pin with an oscillator for transceivers.

Refer Transceiver PHY User Guide & pin connection guideline for more information.

 

Regards

Anand

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