Can I UART/SPI/I2C on any pin of NRF52832?

[Jaydip]

Hi Nordic Team,

- Can I UART/SPI/I2C on any pin of NRF52832  which is mentioned general-purpose I/O pin ?

- Can NRF52832 wakeup via any general-purpose pin?

- Is there any limit on how many pins can I configure as wakeup source?

-  Can I configure 2/3 GPIO pin as wakeup source?

[Karl Ylvisaker]

Hello,

- Can I UART/SPI/I2C on any pin of NRF52832  which is mentioned general-purpose I/O pin ?

 Yes, but you will need to consider the NRF52832 Pin Assignment when you do. Especially important is making sure that you are not selecting low-frequency designated pins for high-frequency ( > 10 kHz ) signals. Furthermore, if you are developing using an Development Kit, you will need to account for the pins that are already connected to other things, as described in the Connector Interface documentation.

- Can NRF52832 wakeup via any general-purpose pin?

Yes, but see the aforementioned. You could use the LPCOMP peripheral for this, but that would require using one of the analogue inputs.

- Is there any limit on how many pins can I configure as wakeup source?

-  Can I configure 2/3 GPIO pin as wakeup source?

I suppose you are only limited by the number of available pins, since all of the GPIOs have the wake-up from high-low detection - but I personally never worked with more than 4 wake-up pins.
For further information about SYSTEM OFF you could read the SYSTEM OFF section of the POWER documentation.

Please let me know if anything still should be unclear,

Best regards,
Karl