Re: USB fails to enumerate on nrf52840_pca10056 board
I suspect my silicon may be too old. I've had the boards for a coupleHi Steve,
There are various issues with your silicon versions:
1) SDK 14.2 was the last version to support engineering A silicon as per https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcomp_matrix_nrf52840%2FCOMP%2Fnrf52840%2FnRF52840_ic_rev_sdk_sd_comp_matrix.html
2) high voltage operation does not work on engineering C silicon or older, errata 140
3) multiple USB erratas, 162, 171, 180, 200, which prevent USB from working
I think I'm wasting everybody's time and should just get a couple ofThat would be a good idea.