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AM263P4: Queries on AM263P4

Dilip kumar
Prodigy 40 points
Part Number: AM263P4
Other Parts Discussed in Thread: AM6442, TMDSCNCD263P

Tool/software:

Hi Team,

I would appreciate your clarification on a few questions regarding the AM263P4 device.

 We are planning to establish a SPI connection (not using the boot mode SPI) between the AM6442 and AM263P4 devices. Is it possible to update the image over this SPI connection, which is separate from the OSPI.

 Additionally, we have RGMII connections between both devices. In your opinion, which interface—RGMII or SPI—would be more efficient for the update process, or which one is more complicated to manage?

 The AM263P4 datasheet states that it has 6 UART ports with RS485 support, but I noticed an additional UART available from the Industrial Domain. Is it possible to use this UART for console purposes during the debugging process?

 Can i add PSRAM and Flash Devices on OSPI Interface in AM263P4 Device for Memory extension ? If Yes, could you please provide examples if available ?

Thanks

Dilip Kumar

  • +1
    TI__Mastermind 35382 points

    Hi Dilip,

    Dilip kumar said:
     We are planning to establish a SPI connection (not using the boot mode SPI) between the AM6442 and AM263P4 devices. Is it possible to update the image over this SPI connection, which is separate from the OSPI.

    Yes, it should be possible to receive image via SPI, then use Flash_write API in application to write to flash. You can also use faster interface such as FSI for this use case also.

  • +1
    TI__Mastermind 35382 points
    Dilip kumar said:
     Additionally, we have RGMII connections between both devices. In your opinion, which interface—RGMII or SPI—would be more efficient for the update process, or which one is more complicated to manage?

    This would be more of a application level choice, as the RGMII will be faster but will be more complicated to manager, you will need ethernet MAC to recive the image into application which involves DMA etc.

    SPI will be slower but much simpler to manager, please consider based on your application, Ti will not be able to give suggestion here.

  • +1
    TI__Mastermind 35382 points
    Dilip kumar said:
    The AM263P4 datasheet states that it has 6 UART ports with RS485 support, but I noticed an additional UART available from the Industrial Domain. Is it possible to use this UART for console purposes during the debugging process?

    No, this UART is not available for debugging purpose. This is meant to be used for applications like ProfiDrive.

  • 0
    TI__Mastermind 35382 points
    Dilip kumar said:
     Can i add PSRAM and Flash Devices on OSPI Interface in AM263P4 Device for Memory extension ? If Yes, could you please provide examples if available ?

    AM263Px has one OSPI interface, so do you mean connecting PSRAM and Flash using different chip select?

    Also do you intennd to boot using OSPI interface, how does the application design look like?

  • 0 in reply to Nilabh Anand
    Prodigy 40 points

    Hi Nilabh Anand,

    We are considering various approaches to implement this, and below are three methods we've identified.

     

    • Method 1: Utilizing the internal flash (8MB) capabilities of the AM263P4 device, we plan to use the SPI (Not from OSPI as not available outside if Flash package used) interface to connect to the AM6442 device for firmware updates.
    • Method 2: Adding a Flash device to the OSPI lines and incorporating another SPI connection to the AM6442 for firmware updates.
    • Method 3: Connecting the SPI from the Boot OSPI lines to the AM6442 to enable complete booting and facilitate updates from the AM6442.

     Additionally, please advise on the best method to pursue.

  • 0 in reply to Nilabh Anand
    Prodigy 40 points

    Yes, PSRAM and FLASH connecting to a different chip select Pins.

  • 0 in reply to Dilip kumar
    Prodigy 40 points

    A Gentle Remainder..!

  • +1 in reply to Dilip kumar
    TI__Mastermind 35382 points

    Hi Dilip,

    Apologies I could not reply earlier as I was OOO.

    Dilip kumar said:
    • Method 1: Utilizing the internal flash (8MB) capabilities of the AM263P4 device, we plan to use the SPI (Not from OSPI as not available outside if Flash package used) interface to connect to the AM6442 device for firmware updates.
    • Method 2: Adding a Flash device to the OSPI lines and incorporating another SPI connection to the AM6442 for firmware updates.

    The difference between method 1 and Metho2 is just the different Am263P4 part number?

    Both the methods would work fine.

  • 0 in reply to Nilabh Anand
    Prodigy 40 points

    Can PSRAM and FLASH be connected to OSPI using different chip select pins?

  • +1 in reply to Dilip kumar
    TI__Mastermind 35382 points

    Yes its possible, but you need to do runtime select fro Chipselect pin, which will make software complicated, also the complexity rises if you plan to use XIP from Flash.

  • +1 in reply to Nilabh Anand
    Prodigy 40 points

    Thank you for your prompt response. I understand that using the XIP package with the AM263P4 controller means the OSPI pins are not physically accessible for other uses. However, I am trying to understand how this setup is relevant to accessing PSRAM in XIP mode. Could you please provide more details on configuring the memory controller for PSRAM access and any potential limitations or considerations? Please provide if any reference designs available from your end.

  • +1 in reply to Dilip kumar
    TI__Mastermind 35382 points

    Hi Dilip,

    There are no limitations as of now with PSRAM testing that we have done internally. We are working on creating the reference example for PSRAM.

    the same will be available in SDK in May end.(2025)

  • 0 in reply to Nilabh Anand
    Prodigy 40 points

    Could you provide any hardware connection references for PSRAM and Flash connected to two different chip selects on OSPI?

  • 0 in reply to Dilip kumar
    TI__Mastermind 35382 points

    Hi Dilip,

    As I have stated previously, We have not tested PSRAM and NOR Flash connected on same OSPI with different chip select. Upon my discussion with HW expert connecting two devices on same OSPI lines directly is not recommended.

    You can follow the AM263Px HW schematics which utlizes a MUX for the connecting a OSPI NOR Flash and a Nand flash on same OSPI lines.

    ti.com/tool/TMDSCNCD263P#design-files

  • 0 in reply to Nilabh Anand
    Prodigy 40 points

    Hi Anand, 

    We plan to use 8 CANs running at 5 Mbps each and 1 RGMII peripheral for communication. Based on your internal testing, do you think the internal 3MB RAM will be sufficient, or should we consider external RAM for added safety?

    If PSRAM can be added on the OSPI interface, which chip select should I prefer CS0 or CS1 ?

    Please note that we are not connecting any flash memory on the OSPI.

  • +1 in reply to Dilip kumar
    TI__Mastermind 35382 points

    Hi Dilip,

    Dilip kumar said:
    We plan to use 8 CANs running at 5 Mbps each and 1 RGMII peripheral for communication. Based on your internal testing, do you think the internal 3MB RAM will be sufficient, or should we consider external RAM for added safety?

    I think 3MB should be fine, but again it will be difficult to say for sure.

    Dilip kumar said:
    If PSRAM can be added on the OSPI interface, which chip select should I prefer CS0 or CS1 ?

    If you are not planning to connect flash at all , then use CS0

  • 0 in reply to Nilabh Anand
    TI__Mastermind 35382 points

    Also which boot media are you planning to use? WHat is the boot mode?

  • 0 in reply to Nilabh Anand
    Prodigy 40 points

    Boot Mode: UART

    According to the latest firmware updates, there is a requirement to add Flash on OSPI along with PSAM, utilizing two chip selects.

    Based on your previous response, if Flash is added on OSPI, CS0 should be connected to Flash and CS1 should be connected to PSAM. Please correct me if am wrong.