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CC2540 MCU power consumption without BLE stack

Keni Dor
Prodigy 90 points
Other Parts Discussed in Thread: CC2540, CC2541

Hi,

what is power consumption of CC2540 while no BLE functionality is running?

MCU has very limited peripheral and core operations. 

How it is affected when I reduce an internal clock ?

Are there any measured current consumption numbers?

Thanks

Keni

  • 0
    Guru 22270 points

    Hello Keni,

    Most of the answers you are looking for can be found in this very thorough Application note.

    Measuring Bluetooth® Low Energy Power Consumption Application Note AN092 swra347a.pdf should provide you with some insight into what affects power consumption and what to do to maximize battery life.

    Thanks,

  • 0 in reply to Greenja
    Prodigy 90 points

    The application note refers mostly the current consumption during Bluetooth operation.

    I'm interested to know what is current consumption while BT is not operational, and only 8051 MCU is working, and also what happens to current consumption when I reduce the internal clock for instance, from 32MHz to 1MHz.

    Thanks

  • 0 in reply to Keni Dor
    Guru 22270 points

    Hello Keni,

    You can download the example software for the CC2541/43/44/45. In there you can find examples without BLE.  Using the current consumption document as you guide, you will be able to test the MCU under different conditions.  The swrc257.zip contains the example.

    I don't know how you are going to reduce the the internal clock from 32MHz to 1MHz, but if you find a way, the current consumption document should still be useful.

    Another option is to load one of the sample projects and in the xxxx_Main.c, comment out osal_start_system(); // No Return from here.  This will at least load everything and allow you to play with the clock using all the OSAL and HAL functions.

    Thanks,