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i.MX28 USB bus powered device with no power switch

Question asked by George Fukutomi on Nov 9, 2014
Latest reply on Sep 2, 2015 by Francesco Lucconi

Dear all,

 

We have planned USB bus powered device using i.MX28.

 

The product does not have a power switch.

Since it connected with USB-HOST, it begins boot.

 

Though we are going to design according to "VDD5V source only" of AN4199, it is not known how we should do a PSWITCH pin.

Is what is necessary just to tied to VDD3V3 or GND?

 

Best Regards,

George

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