Passing Interrupts NRF54L15 M33 to RISC-V

[RJengr]

We are trying to pass interrupts at high speed (clock signal) running at 800khz from port p1 to signal the RISC-V Co-processor to trigger a capture on a 4 bit bus. Is it possible to do this on the nRF54l15? If so how should we implement this signaling, via MBOX? Ideally we would like to set this up with keeping the M33 asleep, and passing the interrupt by hardware.

Our understanding is the P2 pins cannot be directly used in an interrupt context even directly on the FLPR code, is this correct?

Thanks,

RJ

[Vidar Berg]

Hello,

Is the 800 kHz clock signal only active when there is an ongoing data transfer on the bus? And is the goal to sample both the clock and four data lines from the FLPR using the high speed pins on Port 2? If so, is there no other way to determine when a new transfer is about to start than to have a pin interrupt trigger on the clock signal?

Best regards,

Vidar