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Original question:

IWRL6432: System topology

IWRL6432: System topology

Gayathri B
Prodigy 80 points
Part Number: IWRL6432

Sorry for the late reply

Please verify page number 20 on IWRL6432 datasheet.

There are two types of system topologies in that peripheral topology, PIR sensor mentioned as optional. Why PIR sensor is mentioned ? Because we are using RADAR sensor instead of PIR. Then what is the purpose of

PIR there?

 

  • +1
    TI__Expert 8782 points

    Hi,

    One of the reasons is to save on power consumption. For example. A design may have a PIR sensor to check for motion detection, and when it senses motion, the MCU will wake up the IWRL6432 device and have it perform something such as people tracking/counting.

    This is why it is optional. The IWRL6432 could be running people tracking/counting 24/7, but if you include the PIR sensor in this way, you only need to have the Radar sensor up and running when motion is detected.

    Regards,

    Tim

  • 0 in reply to Tim Henderson
    Prodigy 80 points

    Do you have any documents for low power operating methods or modes?

    please share me 

  • 0 in reply to Tim Henderson
    Prodigy 80 points

    Hi sir, 

    One more doubt please, In IWRL6432,  as per the IWRL6432 BOOST schematic VIOIN pins are 3.3V supply, but as per the IWRL6432 datasheet we can give 1.8V supply to VIOIN pins. If I give 1.8V supply to VIOIN pin, Do I need  to follow any considerations? or Do I need to add some components there in hardware point of view ?

  • 0 in reply to Gayathri B
    TI__Expert 8782 points

    Hi,

    I am forwarding this question to the appropriate person on our team. Please allow them some time to respond.

    Regards,

    Tim

  • +1 in reply to Tim Henderson
    TI__Expert 8560 points

    Hi Gayathri,

    It is recommended to have a 3.3V supply to VIOIN pins. The VIOIN can be given 3.3V or 1.8V supply depending on if you are operating on 3 rail or 2 rail Power Optimized topology respectively. If you are operating on 2 rail Power Optimized topology (1.8V supply to VIOIN) all the Digital CMOS I/Os will operate on this supply.