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AR# 66012

UltraScale - Known issues list when using component mode for I/O interfaces i.e IODELAY / IOSERDES.


In UltraScale devices there are two types of I/O interfaces, native and component mode.

Native mode interfaces should used the High Speed SelectIO Wizard. See (Xilinx Answer 64216) for known issues with this Wizard.

This Known Issue list is for component I/O interfaces, which would use IODELAY and IOSERDES components.


The following is a list of Known Issues. Some problems are not currently covered in the documentation and some require fixes in Vivado. 

For software issues, the Fixed version is the first version of Vivado that the issue has being resolved in.

Answer Record Number Title
(Xilinx Answer 66013) UltraScale Component Mode TX & RX How fast should the REFCLK to the IDELAYCTRL be run at?
(Xilinx Answer 64198) UltraScale I/O components reset procedure
(Xilinx Answer 66505) UltraScale Component - IO located in Bitslice [0] not available during delay calibration

Linked Answer Records

Child Answer Records

AR# 66012
Date Created 11/19/2015
Last Updated 03/03/2016
Status Active
Type Known Issues
  • Kintex UltraScale
  • Virtex UltraScale