HFCLK required when keeping only RTC ON with nRF52832

[urataw]

Will the system automatically turn and keep HFINT ON when keeping only RTC ON?

In page 102 of nRF52832 Objective Product Specification, when the system enters ON mode, the HFINT will automatically starts. However, in the previous paragraph, the OPS says that if the system does not request any clocks provided by HFCLK controller, the controller will enter a power saving mode. If the HFINT keeps running, it adds another 55uA on top of what is required to keep the RTC ON, 1.3uA (no RAM retention).

I read the following thread to learn how much current draw is expected when keeping only RTC ON. I wanted to make sure that expected current draw to keep only the RTC ON is as described in the following thread and no HFCLK is required for keeping only RTC ON. devzone.nordicsemi.com/.../

Thanks.

[Einar Thorsrud]

No, the RTC only need the LFCLK. The HFINT is automatically turned on when it is needed, such as when the CPU is running or any peripherals request it. Once it is no longer needed, it will be turned off.

[urataw]

Great. Thanks!