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Custom board USB - PN7462

Question asked by Kamil Serwus on Aug 1, 2019
Latest reply on Aug 8, 2019 by Kamil Serwus

Hi All,

 

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?

 

Thanks,

Kamil

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