custom board NRF54L use SPIM00

RE: custom board NRF54L use SPIM00

Alexandra L — Fri, 12 Dec 2025 09:54:47 GMT

Thank you, that is true. I changed it to:

spi-max-frequency = <1015873>; /* 128MHz/126 ≈ 1,015,873 Hz */

And now it works!

RE: custom board NRF54L use SPIM00

hmolesworth — Wed, 10 Dec 2025 21:00:05 GMT

Note SPIM00 uses 128MHz peripheral core frequency and the Prescaler Divisor range for SPIM00 is 4..126 so the 1MHz clock you specify will cause an error and not work.

RE: custom board NRF54L use SPIM00

hmolesworth — Wed, 10 Dec 2025 20:47:49 GMT

Extra High Drive E0 E1 just add to both spi00 psels; only needed for SCK and MOSI but is benign on MISO I think:

			nordic,drive-mode = <NRF_DRIVE_E0E1>;

RE: custom board NRF54L use SPIM00

Alexandra L — Wed, 10 Dec 2025 17:20:28 GMT

Thank you, I have tested both ways. It is only working when i use SPIM20 and change SCK to P2.01. If i use SPIM00 I can't have any signal.. I don't know if I need to add any configuration to use SPIM00 or not...

But is important for me to use the P2.06 pin SCK since I don't want to change my hardware...

I have found this but I don't understand what is suppose to configure or if it is required in this case.

RE: custom board NRF54L use SPIM00

hmolesworth — Wed, 10 Dec 2025 16:47:37 GMT

P2.04 is SPIM00 SDI, which is actually MISO (Master Input Slave Output); that differs I think from the above overlay. Ditto P2.02 SPIM00 SDO is MOSI (Master Out Slave In). Perhaps try reversing these two pin definitions in the overlay.

RE: custom board NRF54L use SPIM00

Alexandra L — Wed, 10 Dec 2025 16:37:14 GMT

Thank you for your attention,
However on the datasheet it mention these pins i am using.

RE: custom board NRF54L use SPIM00

hmolesworth — Wed, 10 Dec 2025 16:32:05 GMT

Have a look at this link; SPIM00 uses dedicated pins which I think are different to those shown in the overlay above: spim00-failed