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Original question:

MSP432E411Y-BGAEVM: EPI Bus GPIO pin change for SDRAM.

MSP432E401Y: MSP432E401Y SDRAM write and read issue.

naga narasimha
Prodigy 170 points
Part Number: MSP432E401Y
Other Parts Discussed in Thread: MSP432E411Y

Dear TI,

  We are having SDRAM data write and read issue in our custom board.

 which is having MSP432E401Y MCU and SDRAM  IS42S86400F-7TL.

1. we had long discussion regarding SDRAM issue with TI Team in TI Form.

 but it did not resolve the issue. we requested for online debug session with TI team.

Link: https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1189331/msp432e411y-bgaevm-epi-bus-gpio-pin-change-for-sdram/4506702#4506702

2. We had few online debug session with TI Team.

  but it also did not resolve the issue. 

3. They also not able to conclude what is the exact problem. 

ie :The problem with software or hardware.

4. we need quick support form TI to resolve the issue.

Kindly do the needful.

Regards,

Naga Narasimha Rao P

 

  • 0
    TI__Guru**** 191906 points

    Hi,

      Have you had a chance to run the stock example C:\ti\simplelink_msp432e4_sdk_4_20_00_12\examples\nortos\MSP432E411Y_BGAEVM\demos\outofbox_msp432e411y on the https://www.ti.com/tool/MSP432E411Y-BGAEVM board?  This board has an integrated IS42S16320F-7TL – 512 megabit SDRAM. The software example demonstrates read and write access to this IS42S16320F-7TL – 512. I will suggest you please compare your software with this example and also compare your schematic to the EVM board for any subtle differences. 

  • 0 in reply to Charles Tsai
    Prodigy 170 points

    Dear Charles,

      1. In Our design we are using  SDRAM “IS42S86400F-7TLI” which supports X 8 bit data bus.

          But TRM shows MSP432E4 support X16 (single data rate) SDRAM at up to 60 MHz.

     2. Does it mean it will support only x16 bit data 512Mb?

     3. Does it support x 8-bit data 512Mb SDRAM?

    -> If it supports X 8-bit data 512Mb SDRAM what are the changes need to done for SDRAM configuration?

    Regards,

    Naga Narasimha rao P

  • 0 in reply to naga narasimha
    TI__Guru**** 191906 points

    Hi,

    naga narasimha said:

      1. In Our design we are using  SDRAM “IS42S86400F-7TLI” which supports X 8 bit data bus.

          But TRM shows MSP432E4 support X16 (single data rate) SDRAM at up to 60 MHz.

     2. Does it mean it will support only x16 bit data 512Mb?

    You are correct. Only 16-bit SDRAM interface. 

    naga narasimha said:

    3. Does it support x 8-bit data 512Mb SDRAM?

    -> If it supports X 8-bit data 512Mb SDRAM what are the changes need to done for SDRAM configuration?

    As explained only x16 is supported as stated in the TRM. 

    I will suggest you use a x16 SDRAM but that means a board change.