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i.MX6S USB_H1_VBUS pin when power off

Question asked by torus1000 on Nov 7, 2018
Latest reply on Nov 11, 2018 by igorpadykov

Hi,

 

I want to confirm about VBUS pin as following.

According to the i.MX6S/DL datasheet, USB_H1_VBUS input pin seems separated from other power domains.

NOTE
USB_OTG_VBUS and USB_H1_VBUS are not part of the power supply
sequence and can be powered at any time.


4.3.2.3 LDO_USB
The LDO_USB module implements a programmable linear-regulator function from the
USB_OTG_VBUS and USB_H1_VBUS voltages (4.4 V–5.25 V) to produce a nominal 3.0 V output voltage.

 

Is it OK to leave USB_H1_VBUS supplying 5V for a while even all other power supply were off?

 

Can anyone help?

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