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AWR1843: Help Needed for a Custom Radar PCB Design

Ratul Kar
Prodigy 110 points
Part Number: AWR1843
Other Parts Discussed in Thread: TM4C1294NCPDT,

Tool/software:

Hello Everyone

Hope everyone is doing well.

So I am working on a radar PCB Design taking reference from AWR1843BOOST Evaluation board. So in my deign I have made some changes such that it makes the PCB becomes cost effective.

First, I have to ask about the TM4C1294NCPDT IC which is used as a debugging interface similar to the XDS110 family now in my design I have removed the TM4C1294NCPDT IC now can I still debug the PCB using JTAG??

Second, So for debug and flash mode changing we need to change the SOP states using a switch as in the AwR1843BOSST EVKT now for my design I have taken the SOP inputs from a connector externally so will it be okay to take this input externally??

Third, For the debug interface I have used a separate 6 pin connector as well as for the RS232 as a 4 pin connector and one more 18 connector in which I have taken the main VIN supply of 12V for the PCB, the SOP inputs that I have talked about earlier in the above question, UART TX RX lies and the MSS_LOG DSS_LOG connection as well as few Ground pins. Now is it okay to take all these data lines into a single connector???

Fourth, In this design on the AWR1843 Chip their is one pin, numbered as P4 and named as SYNC IN so do I need to connect it while performing the debug operation??

Lastly I am attaching my Schematic design below as a PDF format, I would love to get a review from your side and what are changes will be needed please let me know such that all the points would be covered and my design would be error free. I have tried to write some of the key question above. So I want get review before I send my design for Fabrication and assembly I want to make sure the board works fine after the manufacturing.

Regards

Ratul

  • 0
    TI__Mastermind 22715 points

    Hi,

    Thanks for posting. Could you let us know what market and end application you are targeting?

    Thanks again,

    Ajay

  • 0 in reply to Ajay Narayan
    Prodigy 110 points

    Hello Ajay

    So as you have asked we are targeting the market of automotive ADAS and the our end application is Automotive Cruise Control and Emergency Breaking Assistance.

    Regards

    Ratul

  • 0
    TI__Mastermind 30715 points

    Hello,

    I will answer your questions in order.

    1. Yes, you can just bring the JTAG to a header and use and external debugger (TMDSEMU110-U Debug probe | TI.com). You should design the header to be compatible with the desired debug probe.

    2. Yes, SOP can be controlled externally. You must make sure that SOP pins are stable BEFORE NRST is released.

    3. Yes, should be fine to use a single connector. If you are supplying 12V input from a connector, you must make sure that you can provide sufficient current from that connector to power the board.

    4. SYNC IN is usually not required. This is used for an externally frame trigger if you want to trigger your frames from an external source.

    I do not see any schematic attached to your post.

    Regards,

    Adrian

  • 0 in reply to aozer
    Prodigy 110 points

    Hello Adrian

    Thank you for your valuable answer.

    1. So as you have said I can use JTAG for debug by using a single header so does it need to be add any more components in between the AWR1843 and the JTAG header also do I need to connect the Debug Trace Output line and the DMM pins which are for Debug Interface( Hardware in loop)??

    2. Can you tell me more about the SOP configuration and how I can find whether the NRST is released or not?

    3. Ok understood.

    4.Understood.

    Regards

    Ratul

  • 0 in reply to Ratul Kar
    TI__Mastermind 30715 points

    Hello,

    1. Typically, Trace and DMM are not needed. If you want to understand Trace you can read below. DMM is a raw data input which we do not have any software support for, so you do not need to include it.

    https://developer.arm.com/-/media/Arm%20Developer%20Community/PDF/Learn%20the%20Architecture/Understanding%20Trace.pdf?revision=6b56aa86-4314-49e7-a14d-3ff3e5c8fece

    2. SOP is the sense on power which controls the mode that the sensor boots into. You can search the E2E forums for more information, this has been discussed previously. NRST is the reset input to the radar. When NRST is released, the radar will come out of reset and boot into the mode configured by the SOP pins. The NRST should be controlled by some other circuit on your board, usually the PMIC.

    Regards,

    Adrian