Connect cross power-domain to UART00 on P2 of nRF54L15 DK

[Archiet]

Hi there!

May I know how to have UART00 on P2 like what is shown below as I wanted to have higher speed.

Is it the same as other UART assignments on P0 and P1?

Thanks!

[Edvin]

Hello,

Please see the cross power-domain section of the pin assignment documentation for the nRF54L15.

What pins specifically are you trying to use? Have you used a logic analyzer to see if any of the pins are doing anything? 

Best regards,

Edvin

[Archiet]

Hi there!

I have read the link you shared before. I know it mentions dedicated pins in pin assignment table but I still want to know if I can use any P2 pins for UARTE00. For example, is it possible to use P2.06 to P2.09 for UART with flow control? I understand UART is not mentioned under description and dedicated function of P2.06 but I wanted to know if I can use it by configuration of certain registers.

[jing]

I have the same experience.

for uart00, it works only with the dedicated pin function. not able to use P2.06 for rx. try changing to P2.07.

also observed that the baud rate on the terminal program must be 8x of the uart current-speed.

not sure if has anything to do with the peripheral clock frequency being 128 MHz in mcu domain?

jing

[Edvin]

Hello,

Can any of you please upload the application that you are using to reproduce this. It is easier, and quicker, for me to reproduce, and potentially forward to our developers if I have something that I can just build and flash.

Best regards,

Edvin

[Archiet]

Hi there!

I have attached my main.c, conf file, Cmake list and DTS file here.May I know what other files you need? Or should I zip the project folder and share here?

[Edvin]

Archiet said:

Or should I zip the project folder and share here?

Preferably, yes. If I don't need to create my own application on top of a CMakeLists file and a couple of scattered files, it will be a lot easier for me to reproduce, meaning I will be able to do it sooner.

Best regards,

Edvin

[Archiet]

Hi there!

My computer is not with at the moment but I will do it.

Meanwhile, you can also build it by copying the sample in the link below but with UARTE00 assigned to P2.06(Rx) and P2.08(Tx) with baud rate 115200. It could be an faster alternative for your debugging. Thanks.

github.com/.../l5_e1_sol