CLKUSR pin of Cyclone10

[KBhag3]

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

[AnandRaj_S_Intel]

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]

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]

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