• 0
malkauns

Zybo "Poor placement for routing..." for MRCC/SRCC pin??

Question

I trying to use clock capable pin U15 on the Zynq using a Zybo board.  According to ug865-Zynq-7000-Pkg-Pinout.pdf U15 is one of the pins that are clock capable (MRCC/SRCC):

ug933.png

However I am getting the "Poor placement for routing..." error suggesting that I use "CLOCK_DEDICATED_ROUTE FALSE" which states is undesirable.  Any idea what is going on here?  I'm trying to use this with a high speed camera interface.  thx

Share this post


Link to post
Share on other sites

1 answer to this question

Recommended Posts

  • 1

I found this answer record helpful.  Basically, it suggests that you will need to place this clock pin into a buffer, such as a BUFG, and that there may be no buffers available.  You can set the CLOCK_DEDICATED_ROUTE to FALSE in order to examine what's going on in order to fix things, but then once you figure out (and fix) what's going wrong, you'll want to set it back to TRUE.

Dan

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now