3V is generated from VBUS using LDO_USB.
This 3V is for Full-Speed or Low-Speed.
These are described in 22.214.171.124.3 of the reference manual.
However, high speed works at 400mV.
Which regulator outputs 400mV?
Is it possible to change this 400mV output?
(Looking for the same function as the OUTPUT_TRG bit in the PMU_REG_3P0 register)
Hi Yoshida Satoru
That 400 mV mentioned in the Reference Manual is only seen by the driver transceiver, so you actually will not have an output voltage for the High-speed transceiver regulator, you only have the Data lines working a the nominal 5V.
Hope this info helps