DEVICE DISCONNECT DETECTION

摘要

Systems and methods for operating a universal serial bus are described herein. The method includes sending packet data from a USB2 device to a USB2 host on a pair of signal lines, and after sending the packet data, sending an End-Of-Packet (EOP) signal from the USB2 device to the USB2 host. The method also includes, entering the USB2 device into idle state after sending the EOP signal. The method also includes sending a digital ping from the USB2 device to the USB2 host to indicate device presence during idle state.

主权项

1. A method of operating a universal serial bus, comprising:
sending packet data from a Universal Serial Bus (USB) host to a USB device on a pair of signal lines, and after sending the packet data, sending an End-Of-Packet (EOP) signal from the USB host to the USB device; after sending the EOP signal, entering the USB device into idle state; and during idle state, sending a digital ping from the USB device to the USB host to indicate device presence.