The OTG device with the A-plug inserted is called the A-device and is responsible for powering the USB interface when required and by default assumes the role of host. The OTG device with the B-plug inserted is called the B-device and by default assumes the role of peripheral. An OTG device with no plug inserted defaults to acting as a B-device. If an application on the B-device requires the role of host, then the Host Negotiation Protocol (HNP) is used to temporarily transfer the host role to the B-device.
The OTG device with the A - plug inserted is called the A - device and is responsible for powering the USB interface when required and by default assumes the role of host . The OTG device with the B - plug inserted is called the B - device and by default assumes the role of peripheral . An OTG device with no plug inserted defaults to acting as a B - device . If an application on the B - device requires the role of host , then the Host Negotiation Protocol ( HNP ) is used to temporarily transfer the host role to the B - device .
What is the A-device responsible for?
What is the A - device responsible for ?
powering the USB interface when required
powering the USB interface when required