Dear Sirs,
I am writing you to inquire about following questions about nRF5340.
We are using Laird BL5340 and SDK2.3.0 for our product.
While attempting to write data to SD card, we found in some SD card nRF5340 provide error in initial sequence.
We confirmed four error cases depending on the type of card.
We obtained the waveform and the error log when the error occurred.
Please find the attached ppt.
Could you think of anything that might have caused it?
Besides, are there any way to fix this problem?
SDcard initial err.pptx