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IWR1843: About the 1843 power up time and low power consumption

lucky lucky
Prodigy 30 points
Part Number: IWR1843

  • I have an urgent project need right now, It is required that the power on start time of 1843 can be within 100ms, and the power on time here is mean of when IWR1843 in the offline status ,from the power supply to the serial port output the first frame of 1DFFT data.However, I have reduced the power on time from 400ms to 200ms for the out of box project. I don't know where I can continue to make modifications to reduce the boot time. 

  • Another requirement is how to reduce power consumption. I need the 1843 to go into low power state, If this configuration is available, please let me know the details. In working condition of 1RX,1TX, what is the lowest power consumption.

  • Best regards,
  • Hope to hear from you soon.

         Lucky

  • 0
    TI__Guru 50240 points

    Hi Lucky

    Can you elaborate more on the software modifications?

    Also how are you measuring boot time? Can you share any scope shots or diagrams?

    Regards,

    AG

  • 0 in reply to Akash Gondalia
    Prodigy 30 points

    Akash Gondalia, thank you for your reply.

    About software modifications, there are two main points,

    1, Comment out the redundant configuration commands, only rem

    ain the necessary configuration commands, like the level sensing project, such as adc, frame, chirp .

    2, Comment out the data processing part after 1DFFT.

    In view of our requirement of 100ms startup time on power, we hope to get your modification opinions on the program.

    About the boot time measure methods, as I said above, Configure 1843 to  offline working status.

    We used two channels of oscilloscopes to capture the amplitude change of power supply on 1843 and output data of serial port respectively.

    During the test, the power supply time of 1843 was 300ms each time, but we actually needed within 100ms.

    Because we have a very urgent deadline for this project,  I would like to communicate with you through a teleconference.

    This is my personal email address, yqiwei@stu.xidian.edu.cn

    Regards,

    Lucky

  • 0 in reply to lucky lucky
    TI__Guru 50240 points

    Hi Lucky

    The 300 ms you are seeing could encompass several different phases. Do you have a way to measure this?

    One such way is to use GPIO toggle at different places in code to measure the different phases of operation. It is very possible that your actual boot time is already less than 100 ms.

    Regards,

    AG