cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 
Highlighted
Observer
Observer
174 Views
Registered: ‎07-02-2019

Aurora 8B10B link cannot connect sometimes

I included one Aurora 8b10b IP on two FPGA boards' firmware.

When these two FPGA boards' GTP transceivers are connected, both firmware should have "channel_up" HIGH automatically, which means the link is connected. As shown in the IP manual:

Capture.PNG

But sometimes "channel_up" doesn't go HIGH, this case happens randomly.

I tried to assert/deassert IP's reset and gt_reset, doesn't work.

Anyone has any clue? Or how to look into this issue?

Thanks a lot.

0 Kudos
3 Replies
Highlighted
Observer
Observer
118 Views
Registered: ‎07-02-2019

The sequence of reset and gt_reset I applied is:

reset-0, gt_reset-0
reset-1, gt_reset-0
reset-1, gt_reset-1
reset-1, gt_reset-0
reset-0, gt_reset-0

Sometimes channel_up doesn't go HIGH after this sequence, but if I apply this sequence one more time, channel_up will recover.

The possibility of first time success is ~2/3.

Anyone knows why?

Thanks.

0 Kudos
Highlighted
Xilinx Employee
Xilinx Employee
106 Views
Registered: ‎08-13-2007

0 Kudos
Highlighted
Observer
Observer
103 Views
Registered: ‎07-02-2019

I found I posted at the wrong place, please delete this post.

Thanks a lot.

0 Kudos