Minimizing power consumption in system on

[matan]

Hello,

I am trying to use as least energy as possible.
I run the ble_app_blinky example.
The only change I did was commenting out: advertising_start();
such that no advertising will take place.
In the main loop of this example, there is a call to idle_state_handle which should enter the chip to system_on sleep.
According to the nrf52840 specification under: Power and clock management > Current consumption > Electrical specification I expect to see power consumption of about 0.97uA.
But Using the power profiler kit I see that the actual current is about 630uA.

Can I lower this consumption somehow?

[Vidar Berg]

Hello,

RAM retention is enabled by default and the Softdevice will start the slow clock (32Khz) during initialization so expected sleep current should be closer to ION_RAMON_RTC in your case. But that's if you have disabled debug logging in sdk_config.h as well. Please make sure NRF_LOG_ENABLED is defined as '0'. 

[matan]

1. How can I turn RAM retention off?

2. Can I avoid the slow clock to save energy?