UPGRADE YOUR BROWSER

We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

cancel
Showing results for 
Search instead for 
Did you mean: 
282 Views
Registered: ‎06-21-2017

I'm doing a respin on a board that had theVREF pins of a Zynq Ultrascale+ unconnected since we were not using any Select IO standards that required VREF.  Just to keep things flexible, is there any harm in grounding VREF through a resistor even if we do not need to use INTERNAL_VREF?

0 Kudos
1 Solution

Accepted Solutions
Xilinx Employee
Xilinx Employee
252 Views
Registered: ‎08-10-2008

回复: VREF

Jump to solution

No. If you don't need internal Vref or external Vref pin, you can just connect this pin to GND with a 500 ohm or 1000 ohm resistor, or leave it floating. Both are safe.

------------------------------------------------------------------------------------------------------------
Don't forget to reply, kudo, and accept as solution.
---------------------------------------------------------------------------------------------------------

View solution in original post

0 Kudos
1 Reply
Xilinx Employee
Xilinx Employee
253 Views
Registered: ‎08-10-2008

回复: VREF

Jump to solution

No. If you don't need internal Vref or external Vref pin, you can just connect this pin to GND with a 500 ohm or 1000 ohm resistor, or leave it floating. Both are safe.

------------------------------------------------------------------------------------------------------------
Don't forget to reply, kudo, and accept as solution.
---------------------------------------------------------------------------------------------------------

View solution in original post

0 Kudos