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AM2434: recommended/ proven tested LPDDR vendors

Jan Bock
Expert 3650 points

Part Number: AM2434

Hello Team, 

 

can you please provide a list of proven/tested DDR vendors, since our documentation on gives general guidlines. 

 

Thanks
Jan

  • 0
    TI__Guru* 94741 points

    Jan, we have validated Micron and Nanya devices on our EVMs, and have had customers successfully use devices from multiple vendors including (but not limited to): Micron, Nanya, Samsung, ISSI, Kingston, Winbond, SK Hynix, Gigadevice, Alliance Memory, Changxin Memory Technology (CXMT)

    Here are some guidelines associated with choosing an LPDDR4 device:

    • choose memory devices that are JEDEC standard compliant (JESD209-4B).    Memories that support the latest standard (ie, JESD209-4E) can be used, but some of the newer features not mentioned in 4B version of the specs are not supported.
    • only LPDDR4 devices with IO voltage VDDQ = 1.1V are supported.  LPDDR4x (with IO voltage VDDQ = 0.6V) are not supported.  Some memory datasheets and device will combine LPDDR4/LPDDR4x functionality.  Ensure the device supports LPDDR4 IO voltages: VDD1=1.8V, VDD2=VDDQ=1.1V
    • Connecting multiple LPDDR4 devices is not supported.  This would require a T-branched split of the DQ/DM/DQS on the board (to route a byte to each channel), but data bus is required to be routed point to point.
      • Single channel, dual-rank LPDDR4 choices are limited in the market.
    • Byte-wide LPDDR4 devices are not supported.  Choose only devices with x16 channel
    • AM24x only supports single channel, single rank devices

    Regards,

    James

  • 0
    TI__Expert 4295 points

    Hi  James

    If customer choose a memory that comply with JESD209-4C or 4E, our SOC can support it according to your reply.

    Any change to our default SDK?

    Thanks

    Zekun

  • 0 in reply to Zekun Bai
    TI__Guru* 94741 points
    Zekun Bai said:
    If customer choose a memory that comply with JESD209-4C or 4E, our SOC can support it according to your reply.

    yes, this is correct

    Zekun Bai said:
    Any change to our default SDK?

    Not sure what you are asking here.  The SDK DDR configuration will support the memory that is on the EVMs for that device.  It is not going to change because of a new JEDEC spec revision

    Regards,

    James