We develop custom board with PN7462 with USB support. We created the same two PCBs. And we wrote to flash phExCcid app.
One of them works. One of them has a problem with connection USB because OS said "Unknown USB Device (Device Descriptor Request Failed)". We see that hwUSB_Init retuns LPC_OK. And we see that HIF_IRQHandler is called.
We excluded that is soldering responsible.
Do you have any ideas what we should do/check?