Unused Transceivers in Arria 10

[MK_ABQ]

Hi,

I am using quartus 18.1 Standard edition.

FPGA : Arria 10 : 10AX066N2F40E1HG

I was advised to use the following setting in QSF to protect the unused transceivers from degrading.

set_global_assignment -name PRESERVE_UNUSED_XCVR_CHANNEL ON

How can unused transceivers degrade?

Regards,

Manoj

[FvM]

Hi,
there's a paragraph in PHY users manual describing the issue: "3.8. Unused/Idle Clock Line Requirements". The degradation mechanism isn't explained exactly though.

[WZ2]

Hi there,

Some users might power up transceiver banks normally, even though they don’t use these banks in their design. In such cases, it’s possible for issues similar to those mentioned in this Intel article to occur:

https://www.intel.com/content/www/us/en/docs/programmable/683617/21-1/unused-idle-clock-line-requirements.html

Best regards,

wz