RE: nRF52832 Real Time Counter TICK and PPI question

Keltyx98 — Thu, 03 Nov 2022 15:02:30 GMT

Thank you for your quick answer.
I will then avoid the System OFF mode since it's not possible to reroute the RTC on a PPI that goes to a GPIO pin.
Since both COMPARE and TICK events are available at the same power consumption, I will use the COMPARE event to wake up the MCU via IRQ.

Thank you!

RE: nRF52832 Real Time Counter TICK and PPI question

Kenneth — Thu, 03 Nov 2022 14:40:12 GMT

Hello,

You can find some current consumption values for different power down modes here:
https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/pmu.html#unique_205654252

The nRF52 will automatically enter low power mode (and automatically stop HFCLK) when the MCU is not executing code. The nRF52 will automatically startup the HFCLK on wakeup.

All the ION (System ON) values you see listed are when MCU is in low power mode (in sleep not executing code), on wakeup from ION the MCU will continue to run code from where it was put to sleep on wakeup. The MCU can wakeup on all kind of events (such as RTC etc) when in System ON mode.

For all IOFF (System OFF) values the MCU will reset on wakeup, and only a few wakeup sources are available (pin, nfc, and lpcomp). There is no RTC available in IOFF. The system OFF can only be entered by calling the SYSTEM OFF command from the MCU, if the System OFF command is not called, then the chip will be in System ON.

For all new development you should use the nRF Connect SDK (NCS), see:
https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/nrf-connect-sdk-and-nrf5-sdk-statement

To get started with NCS check out:
https://academy.nordicsemi.com/courses/nrf-connect-sdk-fundamentals/

Best regards,
Kenneth