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Development of Serial UART from Mini USB

Platform : Embedded System Projects

AIM: The main goal of project is development a system to convert USB data in to serial data. PURPOSE: The purpose of project is convert USB data in to serial data. Here USB is connected to PC. By using USB to serial chip we are converting in to serial data. So, converted serial data which is in TTL logic can be read by Micro controller serially and displayed in the LCD. Block Diagram: DESCRIPTION: Every PC comes already with at least one serial port and a parallel port to connect devices such as modems, mice, printers, etc. to your computer. The disadvantages of those two are speed as well as expandability: The serial port can only transfer one bit of data at a time, it transfers data as a series of bits, hence the name. The parallel port can only transfer 8 bits of data at a time. A PC comes only with a limited number of serial and parallel ports; therefore you're out of luck once you used them all up. Another inconvenience of serial and parallel ports are the fact that in order to connect a device to them, you have to turn off your computer, connect the device, reboot, then manually install the driver. USB was designed to eliminate all those shortcomings. USB, which stands for Universal Serial Bus, has been quite successful in the computer market in the last couple of years. It started to show in PCs sometime in 1996 and started to really take off in 1998. USB is another way to connect external devices to your PC. Popular examples for USB devices are printers, scanners, keyboards, mice, joysticks, UPSs, speakers, monitors, network kits, Zip drives, digital cameras, modems, Personal Digital Assistants (PDA) and more. The main goal of project is convert USB data in to serial data. Here USB is connected to PC. By using USB to serial chip we are converting in to serial data. So, converted serial data which is in TTL logic can be read by Micro controller serially and displayed in the LCD. Hardware components: • Microcontroller • Power supply • USB Connector • PC • LCD Software Tools: • Keil u-Vision • Embedded ‘C’ • Express PCB Applications: • Tele Communications Result: According to this project we can develop a serial UART from USB.

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