Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

Reference clocks for Transceiver PLLs

Hi, I'm having issues with transceivers, which I have not used before. Currently I am trying to get a 1.25GHz clock from a Transceiver PLL. The clock I am trying to use as a reference clock is ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

--- Quote Start ---

Hi,

Can you tell about the device and kit used?

Check-in handbook or refer some reference design if available.

Best Regards,

Anand Raj Shankar

(This message was posted on behalf of Intel Corporation)

--- Quote End ---

I'm using a board with an Arria 10. From the Arria 10 Transceiver Guide, there are supposed to be refclks that run down either side of the board and can feed any transceiver PLLs. From the user guide of my board though, de5a_net_e1, there are QSFP+ ref clocks and an I2C programmable oscillator that can apparently be used as a ref clock. For now, I guess I will try to the QSFP+ ref clock and see if the compilation completes.