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]

What timer are you using for this? The RTC is the only timer that can do this for you without using the HFCLK, so I suggest using that if you don't already. You could also make your application wake up at the press of a button.

Best regards,

Simon

[arikramon]

This is FreeRtos function