IOPLL non-dedicated feedback option doesn't work correctly

Hi Roee,

Apologies for the delay reply.

I am looking into the resources and perhaps, this is to be expected when using non-dedicated path mode since it does not use a dedicated clock tree. Here’s the IP description:

Use Nondedicated Feedback Path: If this option is selected, the IOPLL will not use additional core clock resources in its feedback path.

Compensation modes that use nondedicated feedback conserve clock resources and have timing analysis benefits, but they create phase shift and frequency limitations. If compensation is not necessary, consider using direct mode.

Since when you turn this option off and the compensation timing look reasonable then that should rule out doing anything out of the ordinary with the PLL, such as cascading or using a non-dedicated clock pin to the PLL.

However, I will try to escalate this issue to the internal team for further investigation, but it may take some time if you are okay with that.

Regards,

Aqid