USB is a serial bus, using four shielded wires for the USB 2.0 variant: two for power (VBUS and GND), and two for differential data signals (labelled as D+ and D− in pinouts). Non-Return-to-Zero Inverted (NRZI) encoding scheme is used for transferring data, with a sync field to synchronize the host and receiver clocks. D+ and D− signals are transmitted on a twisted pair, providing half-duplex data transfers for USB 2.0. Mini and micro connectors have their GND connections moved from pin #4 to pin #5, while their pin #4 serves as an ID pin for the On-The-Go host/client identification.
USB is a serial bus , using four shielded wires for the USB 2.0 variant : two for power ( VBUS and GND ) , and two for differential data signals ( labelled as D+ and D− in pinouts ) . Non - Return - to - Zero Inverted ( NRZI ) encoding scheme is used for transferring data , with a sync field to synchronize the host and receiver clocks . D+ and D− signals are transmitted on a twisted pair , providing half - duplex data transfers for USB 2.0 . Mini and micro connectors have their GND connections moved from pin # 4 to pin # 5 , while their pin # 4 serves as an ID pin for the On - The - Go host / client identification .
What is USB?
What is USB ?
a serial bus
a serial bus