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IWR6843AOP: Schematic Review Request - Modification of EVM board

Dave Young
Intellectual 520 points
Part Number: IWR6843AOP

Hi TI Team-

First, thank you for publishing your Altium design files for the EVM. It has allowed me to quickly spin up a modified version of the EVM.

I was wondering if you'd be willing to complete a quick schematic review of my prototype design. It is intended to take out most of what you have in the EVM and allow it to fit in our form factor, while also communicating directly over UART (no UART-USB bridge).

A few specific questions that would be very helpful if you can check it out:

  1. Did I remove anything that will prevent the system from working? I cut off the little end of the ES1 EVM to confirm that it works with both operating mode and flash mode, which is did.
  2. What is the AR_MSS_LOGGER signal doing where it goes into the USB-UART bridge? Do I need to connect that to another UART on my system?
  3. I plan on using Q1 and Q2 to allow me to reflash the device from the host controller by holding the 6843 in reset, pulling the PROG net high, and then releasing the 6843 reset to enter flash mode. Do you think that will work?

Thanks! I really appreciate any input you may have.

Dave

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  • 0
    TI__Mastermind 33805 points

    Hi Dave,

     

    Dave Young said:
    Did I remove anything that will prevent the system from working? I cut off the little end of the ES1 EVM to confirm that it works with both operating mode and flash mode, which is did.

    you have all the essential block for the working radar system

    Dave Young said:
    What is the AR_MSS_LOGGER signal doing where it goes into the USB-UART bridge? Do I need to connect that to another UART on my system?

    if you use the EVM, you will see that there are 2 COM ports, the USER UART and DATA. For the demo available on the SDK and TIREX mss logger is used for the data port

    Dave Young said:
    I plan on using Q1 and Q2 to allow me to reflash the device from the host controller by holding the 6843 in reset, pulling the PROG net high, and then releasing the 6843 reset to enter flash mode. Do you think that will work?

    You need to set the device to flashing mode (SOP0:2 -  101) to flash, then set it to functional mode (SOP0:2 -  001) and reset the board to run the application. The set up you should work. 

    I recommend also have a reset button also, so you can easily reset the board without needing a host. 

    Regards,

    Charles O

  • 0 in reply to Charles Oladimeji
    Intellectual 520 points

    Thanks so much! I appreciate the speedy review and suggestions.