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VBUS detection in device mode

Philippe MAIRE
Intellectual 500 points
Other Parts Discussed in Thread: TPS65920, OMAP3530

Hi,

I am using the TPS65920 with an OMAP3530.

I want to use the USB either as a host, or as a device, but not the OTG features. The mode will be decided by the OMAP.

In device mode, I have system requirements that prevent me from connecting the VBUS from the external host to VBUS of the PMIC.

If the PMIC knows in advance it has to run as a device, does the protocol/ the hardware require a +5V on VBUS, or can it handle a proper communication only with D+/D-/ GND ?

Would the absence of VBUS need driver modifications ?

Regards

Philippe