Clock source, power consumption in sleep mode

[arikramon]

I am using nRF52832 SDK 15.2.

I would like to avoid using the 32.768kHz oscillator to save space and cost.

I am using BLE and sleep mode ON.

I defined in sdk_config.h the following:

  1. #define CLOCK_CONFIG_LF_SRC  0 (source RC)

  2. #define NRF_SDH_CLOCK_LF_SRC  2 (source SYNTH)

I noticed that in sleep mode OFF the current consumption is less then 2uA which is OK, but in sleep mode ON the power consumption is 610uA.

My questions are:

1. Can BLE work with the SYNTH clock?

2. Is the power consumption in sleep mode ON is as expected or I should expect less then 610uA ?

Thanks

[Simonr]

Then you're already using the RTC, correct? So timer-wise I guess that would be the best way to do it. But you could still make the application wake up by the press of a button too. These cases also have examples on how to sleep using FreeRTOS: tickless-idle mode & Idle_state_handle.

Best regards,

Simon

[arikramon]

Thanks