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Original question:

IWR6843ISK: Hardware Trigger For IWR6843ISK (No MMWAVEICBOOST)

IWR6843ISK: Hardware trigger IWR6843AOPEVM without Boost DCA board

Josh Huai
Prodigy 20 points
Part Number: IWR6843ISK
Other Parts Discussed in Thread: IWR6843AOPEVM, , IWR6843AOP, MMWAVEICBOOST

Tool/software:

I am looking to trigger the frame capture of the IWR6843AOPEVM as I have seen several people have successfully done that.

For instance, [with IWR6843AOPEVM here](https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/1231464/iwr6843aopevm-hardware-triggering-sync_in-pulse-requirements)

and [with IWR6843ISK here](https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/1039687/mmwaveicboost-mmwave-studio-calling_connecttarget-returned-3-error)

and [with IWR6843ISK again](https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/972613/iwr6843isk-hardware-trigger ).

I have gone through these discussions, the relevant SDK link, and the schematics for IWR6843AOP. 

But I still have some upfront questions.

1. where is the SYNC_IN pin on IWR6843AOPEVM if it exists? Do I need a DCA boost carrier board for sync?

2. I have seen some post about replacing resistors from the DCA carrier board for sync, I guess we don't need to do that for IWR6843AOPEVM, right?

3. We need 3.3V PWM signals to SYNC_IN, right?

Thank you for your clarification,

  • 0
    TI__Mastermind 24357 points

    Hello,

    1. The SYNC_IN pin does not exist IWR6843AOPEVM standalone. If you want to use the 6843AOP and have a hardware trigger, every 6843AOP will need a MMWAVEICBOOST. The MMWAVEICBOOST is an addon that snaps onto the back of the AOP which provides many additional peripherals.

    2. DCA1000 is for collecting unfiltered, unprocessed, dumped real/complex ADC data from the buffer which can then be used to write custom FFT algorithms. No TI Demo needs this as all of our demos provide point cloud, tracking, 1D FFT, classification, etc. It's for those that want to do it their own way. You will still need to replace the resistor as the SYNC_IN pin is not connected by default.

    3. The MMWAVEICBOOST J5 connector Pinout will have the information you need, and you can find it in the User Guide/Data Sheet from the tool's store page https://www.ti.com/tool/MMWAVEICBOOST. I will note for you that any time an individual uses the term "carrier board", its usually with respect to the MMWAVEICBOOST.

    Best Regards,

    Pedrhom