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

Karl Ylvisaker — Mon, 15 Jun 2020 14:44:53 GMT

Hello,

[quote user=""]- Can I UART/SPI/I2C on any pin of NRF52832 which is mentioned general-purpose I/O pin ?[/quote]

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.

[quote user=""]- Can NRF52832 wakeup via any general-purpose pin?[/quote]

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

[quote user=""]- Is there any limit on how many pins can I configure as wakeup source?[/quote][quote user=""]- Can I configure 2/3 GPIO pin as wakeup source?[/quote]

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