including establishing connectivity with USB slave devices, packetizing and formatting the

data packet.

The physical connection between a USB peripheral device and master device is
established with USB cable. The USB 2.0 standards uses two different types of connector
at the ends of the USB cable for connecting the USB peripherals device and host device.
Type A connector is used for upstream connection (connection with host) and Type b
connector is used for downstream connection (connection with slave device).Both type A

and type B connectors contain 4 pins for communication

Pin No Pin Name Description

Differential Data Carrier Line

Differential Data Carrier Line
Ground Signal Line