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Avnet Boards Blog LPDDR4 Memory differences between Ultra96-V1 and Ultra96-V2
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  • Author Author: bhfletcher
  • Date Created: 13 Jul 2019 12:43 AM Date Created
  • Views 1211 views
  • Likes 3 likes
  • Comments 2 comments
  • avnet_ultra96
  • lpddr4
  • ultra96_hardware
  • xilinx vivado design
  • vivado
  • ultra96
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LPDDR4 Memory differences between Ultra96-V1 and Ultra96-V2

bhfletcher
bhfletcher
13 Jul 2019

One common question about Ultra96-V2 is regarding the exact differences in the Micron LPDDR4 with Ultra96-V1. The V1 had a dual-die device which is now EOL. The V2 has an updated, single-die device with the exact same capacity and timing parameters. However, the difference in die quantity shows up as a Rank and Addressing change in the ZU+ PS DDR controller parameters, which affects the designs at the FSBL level.

 

These are the MPSoC PS DDR controller differences on the Ultra96-V2’s Micron LPDDR4 (MT53D512M32D2DS-053 AIT:D) compared to Ultra96-V1's LPDDR4 (MT53B512M32D2NP-062 WT:C).

 

<user_parameter name="CONFIG.PSU__DDRC__DEVICE_CAPACITY" value="16384 MBits"/>

<user_parameter name="CONFIG.PSU__DDRC__RANK_ADDR_COUNT" value="0"/>

<user_parameter name="CONFIG.PSU__DDRC__ROW_ADDR_COUNT" value="16"/>

 

And here is how that looks in Vivado:

image

 

The other key differences are the speed grade and temperature grade. The V2's LPDDR4 speed-grade is faster, but that is irrelevant since the LPDDR4 interface is limited by the MPSoC package. The faster speed-grade was selected based on availability. Additionally, the temperature grade for the LPDDR4 on the V2 is I-grade, making it possible for us to release an I-grade temp Ultra96-V2, which we are working towards for the Fall 2019.

 

Bryan

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  • bhfletcher
    bhfletcher over 3 years ago in reply to clem57

    Funny you should ask...

     

    Yes, it has been released, but we are still working on the press release and documentation to go with it, so there hasn't been much fanfare. The description and price are currently missing on the avnet.com website, and we are working on getting stock at Newark/PF. However, the PN is AES-ULTRA96-V2-I-G, with 1-piece resale at $399, and you can in fact order it either at avnet.com or through your local Avnet branch. If it's something you are interested in designing into your product, you can request a volume quote from your local Avnet FAE or email customize@avnet.com.

     

    http://avnet.me/Ultra96-V2-Industrial

     

    We should have all the information available within the next 2 weeks. Key parameters are:

    • Same functionality as Ultra96-V2 C-grade
    • Temp range = -40C to 85C
    • Includes Delkin Utility+ 16GB card to support the -40-85C temperature range
    • The microSD Card Cage and barrel jack are only specified down to -25C due to have spring actions. If you plan to use at the full -40, it is recommended that you only insert/eject at -25C or above. If that is an issue, we have some customization options that we can explore.

     

    Bryan

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  • clem57
    clem57 over 3 years ago

    The faster speed-grade was selected based on availability. Additionally, the temperature grade for the LPDDR4 on the V2 is I-grade, making it possible for us to release an I-grade temp Ultra96-V2, which we are working towards for the Fall 2019.

     

    bhfletcher

    Just wondering if a new i-grade temp Ultra 96 has been released?

    Thanks

    Clem

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