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CC2640R2F: Bluetooth Startup time

P.Poompat
Expert 1160 points

Part Number: CC2640R2F

Hi TI support team,

How long the bluetooth radio operate after the device is reset (or power on) ?

How can I check ?

Thank you

  • 0
    TI__Guru 58425 points

    Hi P,

    The startup time depends on many factors like how your software is written and what it expects to be doing before performing any radio operations.

    What you could do for (really any situation) is to use some GPIOs to track timings. For example, if you setup a GPIO to toggle when in main and in at the start the BLE task then you can measure the time it takes to the point where you start the actual BLE application (you can measure reset release -> main -> BLE Task).

    If you in addition to this route out the radio LNA/PA signal (if not doing this already) on a GPIO, then you would also know how long it takes until the first radio operation run (in other words, you can measure reset -> main -> BLE Task -> Radio operation). You can read about how to do this in the Technical Reference Manual, section 11.3.3.

  • 0 in reply to IUsedToBeARealPerson (M-W)
    Expert 1160 points

    Hi M-W,

    Thank you for your response

    I am designing the CC2640R2F device interface with external MCU via UART

    I have some question

    1. About reset the device, How much at least time for active reset pin ?

    2. After reset, Does the device need to wait time to opreate BT radio ? How long ?

    3. How I can know the BT device is ready to use ?

    Thank you

  • 0 in reply to P.Poompat
    TI__Guru 58425 points

    HI P,

    1) This number is given in the device datasheet, typically at least 1us.

    2) This is no such number, you will need to wait for what ever application you have on the device to boot and run.

    3) As in 2), it all depends on your application and how quickly it starts.

  • 0 in reply to IUsedToBeARealPerson (M-W)
    Expert 1160 points

    Hi M-W,

    Thank you for the information