nRF52832 Timer power consumption

RE: nRF52832 Timer power consumption

Simonr — Mon, 26 Oct 2020 08:02:41 GMT

The current consumption of the timer example is affected by what frequency you have set your timer to use. The datasheet only looks at the current consumption of the peripheral itself. When the 16MHz clock is enabled, there are a few other parts of the digital domain that also consume more power. This is unfortunately not documented that well.

Best regards,

Simon

RE: nRF52832 Timer power consumption

shai.c — Thu, 22 Oct 2020 08:50:35 GMT

My mistake with the link, the correct one is: \examples\peripheral\timer Time Example

"Please make sure that the HF clock is not initialized and started somewhere in your application" - In this example, there is no use of HF Clock.

RE: nRF52832 Timer power consumption

Simonr — Wed, 21 Oct 2020 13:17:30 GMT

This is a link to the RTC example. Yes, this is using the LF clock, but I assume you're pointing to some other example? If it's the \examples\peripheral\timer you're referring to, this is by no means optimized for low current consumption. Please make sure that the HF clock is not initialized and started somewhere in your application.

Best regards,

Simon

RE: nRF52832 Timer power consumption

shai.c — Wed, 21 Oct 2020 10:24:22 GMT

Hi Simon,

Which clock is using in Timer Example? isn't it LF clock?

RE: nRF52832 Timer power consumption

Simonr — Wed, 21 Oct 2020 09:36:11 GMT

A current draw of ~450 µA pints to the HFCLK being kept running, which seems to be the case here. To minimize current consumption I would suggest looking at I.E. the RTC example project which uses the LF clock to keep track of time and will draw way less power than if the HF clock is being kept running.

Best regards,

Simon