Let’s Know Facts About USB
When you think of influential innovations or inventions in the computer world, what do you think of? Windows, the Mac, iPod? But there is one type of connection that people don’t usually think about: USB, or Universal Serial Bus. But what is USB? Who invented it? And what is it for? To understand USB properly, you need to know its history. Back in the early 1990s, when USB didn’t exist, adding devices to a PC was a big job. Different types of cables had to be used. Most of them were incompatible with each other and their capabilities were limited. Even to connect very common peripherals such as a monitor, printer, mouse, keyboard and speakers, you needed 5 different cables. Regular computers had only two serial ports and a parallel port who was slow and often had to deal with more than he could handle. It was just a hassle. So came the 7 major technology companies of the time, Compaq, DEC, IBM, Intel, Microsoft, NEC and Nortel, together to develop a connection standard that was common, fast and versatile. After less than a year of development, Universal Serial Bus version 1.0 was released. This new design had many advantages. It was versatile, supported plug and play, and was hot swappable. It also had a high transfer speed. After all, it was available on most new computers. Most importantly, adding peripherals became very easy from now on. You just plug it into a USB port, and that was usually all you had to do. If the computer does not recognize the device, it will ask for the driver. How does that technology work? Inside your standard USB 2.0 cable are 4 wires: one for upstream, one for downstream, one for power and one ground. USB allows simultaneous up and downstream of data between the computer and the device and it supplies 5 volts of power.
Architecture of USB
The architecture of a USB system is special. On the one hand you have the host, such as a computer, a TV set or a game console. On the other side, the device, and the cable connecting the two. The relationship between host and device is called a master-slave connection. The PC or the host is the master and decides what to do. The slave or device just follows. The host has two types of responsibilities: hardware and software. The hardware responsibilities include detecting USB connections, supply electrical power to the connected devices and control data traffic between the host and the device. Software responsibilities include managing the connections to the devices, configure the USB devices, run drivers, and control power and bandwidth. You all think you know what a USB plug looks like. But the one you think of is only the most common. You know the standard A plug that you can plug into your computer. That plug takes the power and is the host. Other plugs are the B plug, micro-A, micro-B and mini-B. You put it in the device. They do not take power and cannot give instructions. Wait a minute and think. Have you also seen a USB cable with an A connector on both ends? Probably not, because they are very rare. The reason they don’t occur is because they would both draw 5 volts of power from the host and that causes nutritional problems. Now that we understand how USB works, you have to ask: what good is USB for us now? That may seem simple, but there are actually more good answers than just the obvious ones.
Benefit of USB
Let’s know the benefits. USB has undeniably become the common standard for peripheral connections thanks to its accessibility for hundreds of devices. If you were to ask a layperson to connect a keyboard with the purple 6-pin mini-DIN connector, a mouse at the green PS / 2 port, a PDA at a serial port and a printer at a parallel port, it would get confused and just ask you to repeat your assignment again. But for USB, you don’t have to be a tech to use it. The knowledge of USB has become basic computer knowledge. 1 standard connection for all your devices. We all recognize this well-known logo, as well as that of Apple or Nike. The USB trident logo is printed on each of the more than 10 billion USB devices on the planet. That’s right: more than 10 billion! Well, if USB has really become the standard, what devices is it for? What better way to emphasize this than to list them. Mouse, keyboard, mobile phone, tablets, desktops, laptops, speakers, memory sticks, printers, monitors, scanners, WiFi sticks, joysticks, webcams, digital cameras, modems and network devices. I am not finished yet. Slipper heaters, heating