USB_OTG1 power clarification

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USB_OTG1 power clarification

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NIKHITHAANTONY
Contributor I

In the schematics designed using I.MX7 processor, USB type c connector is used for charging and data transfer. But which power will be connected to the OTG1_VBUS pin. USB power can't be connected since USB will get power only at the time of charging and during data transfer USB will not get power. And also there is 5v output from the PMIC, that also can't connect directly, since when our circuit is powered up, USB will get power all the time.

So what is the best method for giving power to the USB_OTG1, so that it will get powered only if dp and dn of OTG1 signals are used.

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igorpadykov
NXP TechSupport
NXP TechSupport

Hi NIKHITHA

 

VBUS is described in Table 12. USB recommendations  Hardware Development Guide for i.MX7Dual and 7Solo Applications Processors

"The processor should turn VBUS on as required."

Solution can be found in Sabre SD schematic SPF-28590 p.7,21  Design files for i.MX 7Dual

 

Best regards
igor

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