nRF53 XIP Bus Fault

RE: nRF53 XIP Bus Fault

Vidar Berg — Mon, 08 Sep 2025 13:34:54 GMT

I agree, it's reading from the correct address. Please also check the dissasembly view to confirm if it's reading valid instructions from the flash.

RE: nRF53 XIP Bus Fault

justin — Fri, 05 Sep 2025 20:31:57 GMT

I'm not familiar with the workings of the QSPI peripheral.
But it does look like it is trying to read from a correct address.

Yes, the flash chip is verified and used in other applications on this device.

RE: nRF53 XIP Bus Fault

Vidar Berg — Fri, 05 Sep 2025 13:41:49 GMT

Hello,

The nrfjprog readout indicates that the Jlink debugger is able to correctly write and read from the external flash at least, but it's not clear if the FW running on the nRF53 is able to do the same. Have you been able to interface with this flash IC with other samples?

To troubleshoot further you could try to go to this address in the dissambler to see if the CPU is fetching valid instructions from the xip region or not.

Best regards,

Vidar