Create Account
Search
You are here: TDG Forum  >>  Freescale / NXP SOMs and Development Kits  >>  Articles -- Technical FAQs about our Freescale products  >>   Article: iMX31 -- Why No DDR Memory Series Resistors?

Technical Discussion Group Forum

This forum is provided for user discussion. While Beacon EmbeddedWorks support staff and engineers participate, Beacon EmbeddedWorks does not guarantee the accuracy of all information within in the Technical Discussion Group (TDG).

The "Articles" forums provide brief Articles written by Beacon EmbeddedWorks engineers that address the most frequently asked technical questions.

To receive email notifications when updates are posted for a Beacon EmbeddedWorks product download, please subscribe to the TDG Forum of interest.

TDG Forum

PrevPrev Go to previous topic
NextNext Go to next topic
Last Post 17 May 2012 09:35 AM by  glennj@logicpd.com
Article: iMX31 -- Why No DDR Memory Series Resistors?
 0 Replies
Sort:
You are not authorized to post a reply.
Author Messages
glennj@logicpd.com
New Member
New Member
Posts:


--
17 May 2012 09:35 AM
    Q: Why are there no series resistors on all of the signals to the DDR memory on the iMX31 LITEKIT?

    A:
    The i.MX31 LITEKIT excludes the series resistors on the DDR interface for these reasons:
    • Freescale testing on the IMX31 ADS kit found that series resistors provided little to no signal integrity improvement on DDR lines.
    • Low power (mobile) DDR has drive strength control on chip.
    • i.MX31 CPU has some drive strength control on DDR lines.
    • All EMC compliance testing passed without series resistors.

    PRODUCTS Included:
    iMX31
    You are not authorized to post a reply.

    Forums Freescale / NXP SOMs and Development Kits Articles -- Technical FAQs about our Freescale products