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AWR1642BOOST: External Hardware trigger when using an external signal generator to generate a frame

Mark Elo1
Prodigy 20 points
Part Number: AWR1642BOOST

There are two pins on J6 - SYNC_In and SYNC_OUT. I have read on other threads these either can start the frame, or indicate that the frame is starting.  For SYNC_IN you need to mount R165 zero ohm resistor and feed the pulse on the J6 connector pin #9. Is there an equivalent zero ohm resistor for SYNC_OUT.

Can you confirm that out of the box operation with just the AWR1642BOOST board while using the mmWave_Demo_Visualizer interface I can obtain a 3.3v frame trigger output, or provide a frame trigger externally.

Thanks

  • 0
    TI__Guru*** 140634 points

    Hi,

    The mmwave SDK UG mentions that "triggerSelect" - Only option for Software Trigger is supported"

    C:\ti\mmwave_sdk_03_03_00_03\docs\mmwave_sdk_user_guide.pdf

    so, the oob demo was not tested with external frame trigger and we can't confirm that it works.

    Hardware frame trigger has been used by many customers and should work fine as long as

      1) the source code supports this configuration

    - I think that the oob demo probably supports this but was not tested. You should check in the code the triggerSelect implementation.

       2)  the trigger pulse provided is compliant with requirements described in the Radar Interface Control Document

             - C:\ti\mmwave_dfp_01_02_00_01\docs\AWR1xxx_Radar_Interface_Control.pdf (see section 5.5.3)

    Overall, I think using external hw trigger should require little effort

    thank you
    Cesar

  • 0 in reply to Cesar
    Prodigy 20 points

    In another post for EXT trigger in to work you need to mount R165 zero ohm resistor so SYNC_IN would be functional J6, to test SYNC_OUT on J6 is there an equivalent resistor pad?

    Thanks

  • 0 in reply to Mark Elo1
    TI__Mastermind 26305 points

    ello,

    SYNC_IN is enabled on the connector by default so there is no need to populate any resistor. SYNC_OUT will require you to populate R108.

    You can download the assembly and schematic files from the link below. Search the assembly PDF for R108 and you will see where you need to solder the 0ohm resistor.

    Regards,

    Adrian