Current consumption of timer in counter mode

RE: Current consumption of timer in counter mode

bearsh — Mon, 03 Feb 2025 14:10:50 GMT

No, let's close it.
Thanks

RE: Current consumption of timer in counter mode

Simonr — Mon, 03 Feb 2025 13:20:31 GMT

Do you have any follow-ups to this ticket or can we close it?

Best regards,

Simon

RE: Current consumption of timer in counter mode

bearsh — Sat, 01 Feb 2025 13:59:14 GMT

I've changed my application to no longer use the timer module but the rtc to workaround the high currant usage. It seams dppi connected to a timer is not really usable for my initial concept of counting external events...

RE: Current consumption of timer in counter mode

Simonr — Fri, 24 Jan 2025 09:08:32 GMT

I'm not sure I understand what you're saying here exactly. What measurements exactly have you done to get these numbers? When measuring on the nRF5340, have you made sure the core not in use is in a low power state(if you only use I.E. the NET core the APP core should be flashed with "empty_app_core" firmware)?

Best regards,

Simon

RE: Current consumption of timer in counter mode

bearsh — Wed, 22 Jan 2025 15:53:44 GMT

I did some measurements on my hardware. It seems like the timer itself does not need much the DPPI system.

It looks like the DPPI needs some clock to deliver an event from e.g. the gpiote to the timer. If I configure a gpio with event_in and connect that to the count task, it needs about 80uA more than without.

The strange thing is, it needs less if I set the gpiote to lowlatency than if I set it to low power and also configure the sense bits of the gpio. this is quite the opposite than the datasheet tells me...

RE: Current consumption of timer in counter mode

Simonr — Wed, 22 Jan 2025 14:32:37 GMT

No, we don't have the exact current consumption of each peripheral running I'm afraid as there are a lot of peripherals and use cases we don't have estimates/measurements for every possible peripheral running. You can test this with an nRF5340 DK running a Timer/counter project and a PPK2 though.

I think the multicore idle test can be a suitable starting point here, and implementing a timer on either core should be possible.

Best regards,

SImon

RE: Current consumption of timer in counter mode

bearsh — Wed, 22 Jan 2025 14:02:29 GMT

I know this table. I suppose the current mentioned in there also includes the consumption of the oscillator. So it's not really possible to estimate the consumption of the peripheral...

RE: Current consumption of timer in counter mode

Simonr — Wed, 22 Jan 2025 11:55:56 GMT

Please check out page 37-38 of the nRF5340 product specification where we have current consumption numbers for TIMERs running. We don't have numbers for a 64Hz signal I'm afraid, but the numbers here should give you a pointer at least:

Best regards,

Simon