USB high-speed regulator

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USB high-speed regulator

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yoshida_satoru
Contributor I

Hi, 

3V is generated from VBUS using LDO_USB.
This 3V is for Full-Speed or Low-Speed.
These are described in 12.4.1.1.3 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)

Many thanks,

Yoshida

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jorge_a_vazquez
NXP Employee
NXP Employee

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

Best regards

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