Retained register list (nRF52840)

[MKJ]

The datasheet for the nRF52840 states, in section 5.3.6.7, what retained registers do and then, rather unhelpfully, states that details can be found in individual peripheral section. This is unhelfpul as it requires a detailed search of the entire document.

Question 1: Is a definitive list of ALL retained registers available?

In addition the GPIO section states that the CNF is a retained register over reset - certainly soft Reset and wakeup from system off. However this answer:

https://devzone.nordicsemi.com/f/nordic-q-a/53745/nrf52832-pin-state-_during_-reset-retained-registers/272570#272570

suggests that the CNF is NOT retained over a reset.

Question 2: Are the GPIO CNF registers retained?

[MKJ]

One more question: if the watchdog is enabled then does a SoftReset stop it or does the watchdog continue to run?

[Jared]

Hi,

1. No, the referred table is the closest one for an overview.
2. Only through a System OFF reset. Everything else will reset it back to default state.
3. The watchdog timer is not reset from a Softreset, it will continue to run.

regards

Jared 

[MKJ]

OK, thanks