nRF5340 audio DK PCA10121 SPI Question

[gfgf2400a]

Hi,

I reviewed the PCA10121 schematic for using SPI4 pins to connect to Semtech SX1262. Since SPI4 bus also connected to SD card and DSP. I checked to see if SPI0..3 pins are routed to external pins. I saw SPI1 and SPI2 pins are used. I don't see SPI0 nor SPI3 pins are routed to external.

My question is is SPI4 pins are my only options for external Semtech SX1262 to use this dev kit?

Thanks

[Einar Thorsrud]

Except for special pins for high speed mode for SPI4, any pins can be used with SPI, as is the case for other peripherals. So you can generally use any GPIO pins that are routed out (if there is a board with some pins marked as "SPI" that means they are used for it on that design, but it does not mean that you cannot use other pins).