Our customer has question below.
1.About LDO_USB (3.0V Regulator) of iMX6 Dual Plus
If both of USB_HI_VBUS of D10 pin and USB_OTG_VBUS of E9 pin, which is input of this Regulator are OPEN,
It's nothing is voltage output to the VDD_VBUS_CAP ? Is it right ?
How will the status of bit # 17,16 of PMU_REG_3P0 ?
E9 to the pin of USB_OTG_VBUS will supply the 5v,this 5v can be switch the supply and cut off by the
bit # 7 VBUS_SEL of PMU_REG_3P0, the default is zero, if only one or the other of USB_H1_VBUS and USB_OTG_VBUS not supplied, should But be set automatically( I think).
For example, if cut off the VBUS in USB_OTG_PWR, the case of (as a result both of USB_H1_VBUS and USB_OTG_VBUS is OPEN), or remains in default?
After that, the application is started, when supply the USB_OTG_PWR, bit # 7 VBUS_SEL of PMU_REG_3P0 is change to 1 in automatic?
When would be change timming the power supply to one of the USB_H1_VBUS and USB_OTG_VBUS, timing to change the bit # 7 VBUS_SEL of PMU_REG_3P0 ?