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!
  1. Xilinx - All Programmable
  2. Support
  3. AR# 38731: MIG v3.5-v3.91, Virtex-6 DDR3 - Simulation - 'SKIP' Calibration Causes Errors in the Example Design

AR# 38731

MIG v3.5-v3.91, Virtex-6 DDR3 - Simulation - 'SKIP' Calibration Causes Errors in the Example Design

Description

In Virtex-6 MIG DDR3  v3.5-91, when you select the parameter SIM_BYPASS_INIT_CAL = "FAST", it speeds up the simulation of the Example Design and it calibrates error free.

However when you select SIM_BYPASS_INIT_CAL = "SKIP", an error is received and simulation stops.

Solution

When you select SIM_BYPASS_INIT_CAL = "SKIP", bit alignment errors can occur in the PHY.

As a result the data valid signal is incorrectly asserted with a latency of one clock cycle.

This is scheduled to be fixed in the 14.2 release,  until then ensure that you set the SIM_BYPASS_INIT_CAL parameter to "FAST".

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
39128 MIG Virtex-6 and Spartan-6 v3.7 - Release Notes and Known Issues for ISE Design Suite 13.1 N/A N/A
50642 MIG Virtex-6 and Spartan-6 v3.92 - Release Notes and Known Issues for ISE Design Suite 14.3 N/A N/A

Associated Answer Records

Answer Number Answer Title Version Found Version Resolved
43130 MIG Virtex-6 and Spartan-6 v3.9 - Release Notes and Known Issues for ISE Design Suite 13.3 N/A N/A
41347 MIG Virtex-6 and Spartan-6 v3.8 - Release Notes and Known Issues for ISE Design Suite 13.2 N/A N/A
39128 MIG Virtex-6 and Spartan-6 v3.7 - Release Notes and Known Issues for ISE Design Suite 13.1 N/A N/A
38951 MIG v3.61 - Release Notes and Known Issues for ISE Design Suite 12.4-14.2 N/A N/A
37173 MIG v3.6 - Release Notes and Known Issues for ISE Design Suite 12.3 N/A N/A
45194 MIG Virtex-6 and Spartan-6 v3.91 - Release Notes and Known Issues for ISE Design Suite 13.4 N/A N/A
AR# 38731
Date 08/20/2014
Status Active
Type Known Issues
Devices
  • Virtex-6 CXT
  • Virtex-6 HXT
  • Virtex-6 LX
  • More
  • Virtex-6 LXT
  • Virtex-6 SXT
  • Less
IP
  • MIG
Page Bookmarked