topic Re: i.MX6S USB_H1_VBUS pin when power off in i.MX Processors

i.MX6S USB_H1_VBUS pin when power off

torus1000 — Thu, 08 Nov 2018 03:47:06 GMT

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?

Re: i.MX6S USB_H1_VBUS pin when power off

igorpadykov — Thu, 08 Nov 2018 09:58:17 GMT

Hi torus1000

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

yes it is OK.

Best regards
igor
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Re: i.MX6S USB_H1_VBUS pin when power off

torus1000 — Mon, 12 Nov 2018 04:50:14 GMT

Dear Igor igorpadykov‌

Just in case,

Is it acceptable to keep same situation(all powers off except USB 5V) over 72 hours?

Thanks

Re: i.MX6S USB_H1_VBUS pin when power off

igorpadykov — Mon, 12 Nov 2018 05:02:35 GMT

Hi torus1000

yes acceptable.

Best regards
igor