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Maximum external memory size to support by Solo X

Question asked by Takayuki Ishii on Oct 4, 2018
Latest reply on Oct 4, 2018 by Takayuki Ishii

Hello community,


I have some basic questions about i.MX6SoloX DDR and EIM.

    1) maximum memory size of DDR.

        - In MMDC it can allocate 4GByte (32bit address). It can mapped 2GByte area selected from 4GByte physical memory area for Cortex-A9 and 1.5GByte for Cortex-M4.

    Is it correct?


    2) maximum memory size of NOR-Flash.

        - In i.MX6Solo, it have EIM errata ERR004446 "EIM: AUS mode is nonfunctional for devices larger than 32 MB"

          In i.MX6SoloX this errata is fixed in EIM rev2. So A24 can work correctly and it can map more than 32MByte parallel  NOR-Flash.

    Is it correct?


    3) In DSZ bit Description of EIM_CSnGCR1 register, "NOTE:" say as following.


        "NOTE: Only async. access supported for 8 bit port."


    It say that 8bit port mode can use with only async setting.

    It doesn't say that async mode is not support 16/32bit port access.


    Is it correct?


I look forward to hearing from you.


Best regards,