Question on nRF54L15 QFN48 pin assignment

[ShawnL]

Hi,

I`m designing the schematic, and met some problems, could you please give me some guidance?

• Does the pin only supports the described peripheral function and not support remapping to other peripheral functions? For example, does P2.06 only supports SPI SCK and not supports UART TX/RX or other peripheral pin functions.

• Can UART TX or RX pin remap to the pins which are only described "General purpose I/O" without any other description? For example, can uart tx remap to P0.00?

Thank you in advance.

BRs

[Håkon Alseth]

Hi,

 

Does the pin only supports the described peripheral function and not support remapping to other peripheral functions? For example, does P2.06 only supports SPI SCK and not supports UART TX/RX or other peripheral pin functions.

This shows the different domains:

https://docs.nordicsemi.com/bundle/ps_nrf54L15/page/overview.html#ariaid-title2

 

As an example, UART30 has dedicated pins available in GPIO P0.

For UART2x instances, they can cross domain, into GPIO P2, but only on dedicated pins, as described here:

https://docs.nordicsemi.com/bundle/ps_nrf54L15/page/uarte.html#d1900e814

https://docs.nordicsemi.com/bundle/ps_nrf54L15/page/chapters/pin.html#ariaid-title2

 

For example, does P2.06 only supports SPI SCK and not supports UART TX/RX or other peripheral pin functions.

Correct for crossing into the P2 domain. However, for the P1 domain, it can use any freely available GPIO, as stated here:

https://docs.nordicsemi.com/bundle/ps_nrf54L15/page/chapters/pin.html#ariaid-title2

 

Can UART TX or RX pin remap to the pins which are only described "General purpose I/O" without any other description? For example, can uart tx remap to P0.00?

UART30 can use any freely available GPIO on P0. No peripheral is able to cross over to the P0 domain.

 

Kind regards,

Håkon