• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 51 subscribers
  • Views 200 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CC2642R: More Details about Sensor Controller

David Tandri
Expert 1355 points
Part Number: CC2642R

Hi,

I know that the power consumption when performing tasks in sensor controller domain is very low and consist of 2 modes such as active mode and low-power mode which run at 24MHz and 2 MHz.

In order to save power, I would like to interface the sensor controller pins to collect sensor data via available communication lines provided by the external sensor module during standby mode.

I prefer running it in low-power mode because the current consumption is much lower at 30.1 uA to save power even further.

My concerns are:

1) What is the effect of running it in sensor controller active mode with 24MHz and low-power mode with 2MHz?

2) Is there any significant difference between the 24MHz and 2MHz (except the current consumption) in my application?

Any advice on this?

Thanks in advance

  • 0
    TI__Expert 4560 points

    Hi David. 

    One of the differences of running in low-power mode and active mode is that some of the peripherals does not support low power mode, like the ADC and I2C, the full list can be found under "Power and Clock Settings Panel" in the Sensor Controller Studio Help menu. 

    The power modes also dictates the speed the AUX Bus runs at, so in active mode the AUX Bus runs at 24 MHz, while in low power mode, if the MCU domain is in standby mode, it runs at 2 MHz. The setting to select 2 MHz for the sensor controller in Active mode is to allow switching between active and low-power mode without affecting code execution speed or resources that run at Sensor Controller clock rate.

    Regards, 
    Vegard