HTML clipboardThe USB is an interface that provides a standard serial bus for connecting devices to a personal computer (usually a PC). A Universal Serial Bus has an asymmetric design, consisting of a single server and multiple devices connected in series to extend the range of connection (in a tree structure). So, you can connect up to 127 USB devices, USB sticks, etc. A single server. Intel developed the Universal Serial Bus to replace an entire system of the interfaces of the PC used at that time and to standardize them. The introduction of USB1.0 in the market was 1996. USB was designed for connecting devices to your PC. Therefore the specification was not limited USB keyboard and

mouse, also includes (from top) separated various peripheral devices such as printers and scanners. The first standard, USB1.0, had a maximum bitrate of 1.5 Mbit / sec. The reports of mass - such as a hard drive or a USB stick - were not considered at first as substantial use of USB. However, it turned into one of the main uses of the Universal Serial Bus today. Since 1998 was introduced to the market the revised standard USB 1.1. The increased speed of 1.5 MBit / s to 12 MBit / s. In 2000 he introduced the USB2.0 specification. The biggest advantage of adding a standard USB2.0 high speed mode for 480 Mbit / s (60 MBs). At its highest speed, it competes directly with FireWire. However, products such as USB sticks to this standard from 2002 appeared on the market. (Since then the add-German computer company, the partner of usb-mania, is dedicated exclusively to promoting and custom USB verder in the European market) Interface with USB 2.0 equipment indicated does not necessarily mean that this computer also transmits data from the high speed of 480 Mbit / s. Although USB 2.0 can deliver up to 480 Mbit / s statistically, some custom flash drive are limited by the width of banda device's internal memory or the chip control device USB mass storage. Therefore reached speeds slower reading, performing the write operations a little slower. You can expect 480 MBit / s only if the team out with the seal of certified USB USB.org "USB Hi-Certified Speed. " The USB-USB Mania meet all requirements for this certificate. USB-Mania Chips developed exclusively by Samsung or Hynix, also for our internal controls. An extension of USB called USB On-The-Go allows a port to act as a server or device - this is determined by which side of the cable is connected to the device. Even after the cable is connected and the units are communicating, the 2 units can "change paper" under the control of a program. This facility is specifically designed for connecting a digital camera with a printer, devices such as PDAs, where the USB link might connect to a PC as a device and a server to connect a keyboard or mouse, or exchange files music between MP3 players. The USB-On-The-Go "has also designed 2 small connectors, the mini-mini-A and B, so this should stop the proliferation of miniature connector input. The specification of the USB-OTG "officially became the 18 December 2001. A USB (Universal Serial Bus, in English pendrive or USB flash drive) ... is a small storage device that uses flash memory to store information without the need for batteries. These memories are resistant to scratches and dust that have afflicted previous forms of portable storage, such as CDs and floppy disks. USB sticks have become the system for storage and transport of personal data used in this application moving to the traditional floppy disks. There are 8 GB USB stick to a moderate price for sale. Its popularity has made him plenty of popular names related to their small size and the various forms of presentation, none of which has been noted among them: pincho, lighter, key ring, key or the original packaging in English pendrive, flash drive or memory. Primary components The parts of a typical Flash memory are: A male type A USB connector (Item 1): Provides the physical interface with the host computer Mass Storage Driver (Item 2): implements the controller interface and provides uniform and linear for serial USB devices designed to block, while hiding the complexity of guidance blocks, removing blocks and balance of wear. This driver has a small RISC microprocessor and a small number of chip RAM and ROM NAND Flash memory chip (Item 4): Stores data, such chips are also commonly used in digital cameras. Crystal Oscillator (Item 5): Produces the main clock signal of 12MHz and a device controls the output data through a closed loop phase (phase-locked loop) Additional Components A typical device may also include: Bridges (Jumpers) and Test Pins (Item 3): Used in testing during the manufacture of the unit or for loading code into the processor. LEDs (Item 6): Indicates data transfer or the readings and writings. Write protection switch (Item 7): Used to protect data write operations or deletions. Free Space (Item 8): There is a space to include a second memory chip, this allows manufacturers to use the same printed circuit devices of different sizes and thus respond to market needs USB connector cover: Reduce the risk of damage due to static electricity, improves the appearance of the device, some units do not have a cap but a retractable USB tab. Other devices have a rotating cap that is not separated from the device and never avoids the risk of losing it. Help for transport: In many cases, the cap contains an opening for an adequate chain or necklace, but this design increases the risk of losing the device. For this reason many others have that opening in the body of the device and not on the cover, the disadvantage of this design that the chain or collar is attached to the device while connected. Many designs bring the opening in both places.