nrf_sdh_enable_request hardware fault

[Ranajyoti Chakraborti]

I have a eval board pca10040 and a custom board both having nrf52832 chip, on the eval board the nrf_sdh_enable_request function calls happens successfully with error code 0 but on the custom board it would cause a hardware fault and reset the code. I have been trying to debug this for the past week but couldn't figure out what could be wrong with the custom board. I don't think it is a problem with the software, but I just want to know what are the possibilities of things going wrong in the hardware. I am using SDK 15.2.0, I am using nrfGo Studio to flash the binary to both board. The OS is Windows 10. Please help with this.

[Dave_couling]

Suggests to me that the LFCLK might not be start-up properly.  Are you using an external crystal for the 32.768kHz clock?

[Ranajyoti Chakraborti]

Thanks for your response, will check with the hardware guy and let you know.