AR# 72651

LogiCORE IP Video Mixer (VM) - Why can I not I see the option 'Use UltraRAM for Line Buffers' in the configuration GUI of the IP in Vivado 2019.1?


The Option to use UltraRAM for Line Buffers is listed in (PG243), but it is not available in the GUI.

Vivado 2018.3:


Vivado 2019.1:



The UltraRAM utilization impact on LUTs and FIFOs is now higher due to changes in Vivado.

As a result, tool changes will be required before the UltraRAM can be enabled in the HLS IPs.

Until these changes are made, it is not recommended to enable UltraRAM in HLS IPs.

The 'Use UltraRAM for Line Buffers' option is only available in Vivado versions up to 2018.3 and on some specific boards, as not all boards contain URAM (Please see below for list of devices).

For reference:

Across all families (CG/EV/EG):

  • ZU2/ZU3/ZU6/ZU9 do not have URAM
  • ZU4/ZU5/ZU7/ZU11/ZU15/ZU17/ZU19 have URAM

Reference: (link)

For boards:

  • ZCU102 has a ZU9 EG part -> No URAM
  • ZCU104/ZCU106 have a ZU7 EV -> Have URAM

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
66753 LogiCORE Video Mixer - Release Notes and Known Issues for the Vivado 2016.1 tool and later versions N/A N/A
AR# 72651
Date 08/19/2019
Status Active
Type General Article