using the MK22FX512VLL12. Does the USB (device) require 5V into VREGIN to operate? A separate 3.3V source is applied to VDD.

[brandontaylor]

Does the internal transceiver only get power from VREGIN?

[Jorge_Gonzalez]

Hello Brandon:

Yes the transceiver gets its power from the Vreg, so you must connect VREGIN. It does not have to be 5V. according to datasheet you can wire VREGIN to VDD (3.3V)

Regards!,
Jorge Gonzalez

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