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DRA821U: Concurrently Usable Number and Purpose of Serial Interfaces

Jack
Mastermind 9165 points
Part Number: DRA821U
Other Parts Discussed in Thread: DRA821

Hi TI.

There's a question that Customer wants to clarify about serial interface.

Please let me know the number and purpose of the respective serial interface which is available at the same time in DRA821U.

Thanks.

Regards, 

Jack

  • 0
    TI__Genius 10180 points

    Jack,

    Please check the DRA821 DM here:  https://www.ti.com/lit/gpn/dra821u and use the PinMux tool to determine what I/Os can be used concurrently to meet customer needs. https://www.ti.com/tool/PINMUXTOOL

    Best Regards,

    Shiou Mei

  • 0 in reply to Shiou Mei Huang
    Mastermind 9165 points

    Hi Shiou

    Thanks for kind reply.

    Could you check if USB and PCIe works together at same time?

    According to PIN MUX Tool. It seems be not allowed even the following statement says two module can be used concurrently.

    SGMII, USB3.0, and PCIE share total of four SerDes lanes. A maximum of two of the three IP (for example, SGMII and USB) can be used concurrently

    Thanks.

    Regards, 

    Jack

  • 0 in reply to Jack
    Mastermind 9165 points

    HI Shiou

    According to PINMUX tool, There're totally 12 serial modules able to run concurrently. 

    • I2C, I3C
    • MCU_I2C, MCU_I3C, MCU_SPI, MCU_UART,
    • PCIe or USB, SPI, UART
    • WKUP_I2C, WKUP_UART

    Is there any other serial interface from DRA821U device?

    Please check what I am seeing is right. and also let us know whether PCIe and USB can not run concurrently.

    Thanks.

    Regards, 

    Jack 

  • 0 in reply to Jack
    TI__Genius 10180 points

    Jack,

    On the Pin Mux Tool, instead of using "All pins of interface" for USB and PCIe, can you re-try with only 1 or 2 pins selected?  The two shares the same IP so you cannot use full pins on both interfaces.

    There are also MMC and OSPI customer can operate in 1-bit mode.  The customer can reference TRM for information on available serial interfaces; once they found the interface they'd like to use, they can check for concurrency use case using the Pin Mux Tool.

    TRM:  https://www.ti.com/lit/pdf/spruiu1

    Best Regards,

    Shiou Mei