Communication over identification line

摘要

In one example a method includes communicating, by a first device, with a second device via an identification (ID) line of a universal serial bus (USB) cable. A first connector of the USB cable may be attached to a USB connector of the first device. A second connector of the USB cable may be attached to a USB connector of the second device. The USB connector of the first device may include a bus voltage (VBUS) connector configured to mate with a VBUS line of the USB cable, a positive data (D+) connector configured to mate with a D+ line of the USB cable, a negative data (D−) connector configured to mate with a D− line of the USB cable, the ID connector configured to mate with a ID line of the USB cable, and a ground (GND) connector configured to mate with a GND line of the USB cable.

主权项

1. A device comprising:
a universal serial bus (USB) connector comprising:
a bus voltage (VBUS) connector configured to mate with a VBUS line of a USB cable;a positive data (D+) connector configured to mate with a D+ line of the USB cable;a negative data (D−) connector configured to mate with a D− line of the USB cable;an identification (ID) connector configured to mate with a ID line of the USB cable; anda ground (GND) connector configured to mate with a GND line of the USB cable; and a communication module configured to communicate with another device via the ID line of the USB cable, wherein the communication module is configured to negotiate one or more power characteristics for the VBUS line with the other device, and wherein the one or more power characteristics for the VBUS line include one or more of: a voltage level for the VBUS line; and a current level for the VBUS line.