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AR# 69313

MIG 7 Series - Notification when Modifying Default MIG Parameters for Artix-7 or Spartan-7 Devices with DDR3, DDR3L, or LPDDR2 Interfaces

Description

Version Found: MIG 7 Series v3.0

Version Resolved: See (Xilinx Answer 54025)

When adding the Memory Interface Generator (MIG 7 Series) IP to a Spartan-7 or Artix-7 based design you will see a notification message underneath the Clock Period field in the Controller Options of the MIG GUI:

To achieve optimum resource utilization maintain the default controller options given by the tool. See AR#69313 for more information.

Solution

In order to make the most efficient use of Artix-7 and Spartan-7 device resources, the MIG IP was optimized for certain controller options for LPDDR2, DDR3, and DDR3L based interfaces.


The interface rate is optimized up to 667Mbp/s (333MHz) and operating at higher data rates will cause a comparatively large increase in resource utilization.

Devices with a maximum memory interface clock rate less than 333MHz can operate up to their maximum value without any additional penalty.


The MIG IP is also optimized for component interfaces, a 2:1 PHY to controller clock ratio, strict command ordering, and the number of bank machines on a per device basis.

Using the default settings in the Controller Options page of the MIG customization GUI typically results in a 30% LUT saving when compared to designs that do not use the default settings.

Revision History

08/02/2017 - Initial Release

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
54025 MIG 7 Series - IP Release Notes and Known Issues for Vivado N/A N/A
AR# 69313
Date 04/16/2019
Status Active
Type General Article
Devices
  • Artix-7
  • Spartan-7
Tools
  • Vivado Design Suite
IP
  • Memory Interface and Controller
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