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Original question:

PROCESSOR-SDK-AM62X: DDR-MARGIN-FW for DDR4 SDRAM

PROCESSOR-SDK-AM62X: DDR-MARGIN-FW: DDR4 not supported

Jonathan Cormier
Genius 3931 points
Part Number: PROCESSOR-SDK-AM62X
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

I have been troubleshooting an issue for several weeks related to memory failures at the high end of the temperature range.  And lucked upon the DDR-MARGIN-FW firmware and was hoping to use it to make sure we have sufficient timing margins.  However apparently the tool only runs on LPDDR4 memory, which wasn't mentioned anywhere on the tool download page or in the README.

https://www.ti.com/tool/download/DDR-MARGIN-FW/1.8.0.1

Change request:

A: The download page and the README should list that this only supports LPDDR4

B: Please support DDR4.  Is there some technical reason this cannot be done?

  • 0
    TI__Expert 5675 points

    Greetings Jonathan,

    The tool as is cannot be used on DDR4, as the IP works a little differently under the hood between the two DRAM types. It may be possible, but would require engineering effort that we do not have plans or resources for currently.

    That being said, understand the memory failures at high temps. Few follow up questions:

    • Is this problem on a specific board or noticed on several?
    • What's the exact temp/ temp range the problem is being seen in?
    • Do you have a feel or logs for what kind of memory failures are occurring? These failures can happen in normal operation or during something stressful like memtester, but how exactly is failing may be easier to see in memtester logs. This utility should be built in to our Linux SDK.
    • Have you had a chance to try increasing the refresh rate? This should be possible in our sysconfig tool for the DDR configuration, which would help narrow down if the failure is due to memory retention (as in literal DRAM cells not being refreshed fast enough) or some sort of data validity issue due to reads/writes on the bus aggravated by temperature.

    Sincerely,

    Lucas

  • 0 in reply to Lucas Bowe
    Genius 3931 points

    Hi Lucas, thanks for the response.  We are reaching out through our FAE