nRF52805 - Apply bug fix from nRF52840 also here?

[Hauser]

Hi Support team,

in the following link, there is a fix decribed to get lowest power down current of the UART0 of the nRF52840:

https://devzone.nordicsemi.com/f/nordic-q-a/26030/how-to-reach-nrf52840-uarte-current-supply-specification

*(volatile uint32_t *)0x40002FFC = 0;
*(volatile uint32_t *)0x40002FFC;
*(volatile uint32_t *)0x40002FFC = 1;

Is this fix also needed for the nRF52805? I do not think so!

Thank you!

BR Hauser

[Einar Thorsrud]

Hi Hauser,

The content of the post you linked to is also relevant for nRF52805, yes. However, please read the end of the post where it describes that this is not needed if the UART transactions are properly stopped.

Einar

[Hauser]

Hi Einar,

got it, thank you!

For all others, here the important lines:

Just adding that the UARTE TX has to be stopped explicitly when it's finished. If you just close the UART without stopping the transactions the UART will continue to keep the clocks running, as described above.

This can be done through the nrfx_uarte_tx/rx_abort() functions, or the TASKS_STOPRX/TX registers directly.

If you do this before disabling the UART the above workaround is not needed.

BR Hauser