Low Power Optimizations

If the device seems to be drawing too much current for your application, the following section will guide through the most common issues.

Note

Please refer to EnergyTrace User Guide as well as the Current Consumption Application Note for how to setup device for current consumption testing.

  • Check if the debugger is currently detached from the device. If using the XDS110 as debuger make sure to only connect the Ground and Power pins (this can be accomplished with jumper cables).

../_images/Mod_LP_Config_2.png

Modular LP EnergyTrace stand-alone Configuration

Warning

Confirm that the device has been power cycled since last time it was connected to the debugger.

  • Isolate the CC23xx or CC27xx from all peripheral devices (such as LEDS, External Flash, etc..) as these leakage currents might be the cause of higher power consumption than expected. If using a Launchpad confirm all jumpers are removed.

  • Isolate threads in the application until the thread with high power consumption is found. Once found, start isolating which peripherals (UART, I2C, SPI, ADC, Timers) are used in the thread and check if one of these could be the source of the issue. If any peripheral is set to start a transfer in blocking mode, the CC23xx or CC27xx will not be able to go into standby if the transfer never finished. Ex, if UART is set to restart receiving in blocking mode, the device will not go into standby until the expected data is received.