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AR# 55056 MIG 7 Series DDR2/DDR3 - AXI Interface Enabled - During continuous read or write commands, bubbles/gaps are seen between the user interface bursts

Description

Version Found: MIG 7 Series v1.8
Version Resolved: See (Xilinx Answer 45195)

When the MIG 7 Series DDR3/DDR2 controller with the AXI interface enabled receives continuous read or write commands, there will be bubbles/gaps between the user interface app signals. This results in a loss of efficiency.

Solution

The AXI write and read state machine causes this behavior because the state machine cannot continuously send out UI commands. When the AXI burst is short, it will result in the greatest performance loss. The current workaround is to use long AXI bursts, which will reduce the bubbles/gaps but will not remove them completely. This issue is planned to be fixed in 2013.2.

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
45195 MIG 7 Series - Release Notes and Known Issues for All Versions N/A N/A

Actions

AR# 55056
Date Created
Last Updated 03/27/2013
Status Active
Type General Article
Devices
  • Artix-7
  • Kintex-7
  • Virtex-7
IP
  • MIG 7 Series
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