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Encyclopedia > 16550 UART

The 16550 UART (universal asynchronous receiver transmitter) is made by National Semiconductor. Both the hardware and software interface of the 16550 are backward compatible with the earlier 8250 series and 16450 UART. The 16550 offers a 16-byte FIFO buffer. Now revised to the 16550D. It is an integrated circuit designed for implementing the electrical interface for serial communications; it is frequently used to implement the serial port for IBM PC compatible personal computers, where it is often connected to an RS-232 interface for modems, serial mice, printers, and similar peripherals. A UART or Universal Asynchronous Receiver-Transmitter is a piece of computer hardware that translates between parallel bits of data and serial bits. ... Categories: Electronics companies of the United States | Companies based in California | Corporation stubs ... Hardware is the general term that is used to describe physical artifacts of a technology. ... Computer software (or simply software) refers to one or more computer programs and data held in the storage of a computer for some purpose. ... The 8250 series of integrated circuits, originally manufactured by the National Semiconductor Corporation, are Universal asynchronous receiver transmitter (UART) chips commonly used in PCs and related equipment such as printers or modems. ... In computer science a byte is a unit of measurement of information storage, most often consisting of eight bits. ... FIFO is an acronym for First In, First Out. ... In computing, a buffer is a region of memory used to temporarily hold output or input data, comparable to buffers in telecommunication. ... Integrated circuit showing memory blocks, logic and input/output pads around the periphery Microchips with a transparent window, showing the integrated circuit inside. ... In telecommunications and computer science, serial communications is the process of sending data one bit at one time, sequentially, over a communications channel or computer bus. ... A male DE-9 connector used for a serial port on a PC style computer. ... IBM PC (IBM 5150) with keyboard and green screen monochrome monitor (IBM 5151), running MS-DOS 5. ... RS-232 (also referred to as EIA RS-232C or V.24) is a standard for serial binary data interchange between a DTE (Data terminal equipment) and a DCE (Data communication equipment). ... Operating a mechanical 1: Pulling the mouse turns the ball. ...


Similarly-numbered devices, with varying levels of compatibility with the original National Semiconductor part, are made by other manufacturers.


References

This article was originally based on material from the Free On-line Dictionary of Computing, which is licensed under the GFDL. The Free On-line Dictionary of Computing (FOLDOC) is an online, searchable encyclopedic dictionary of computing subjects. ... Bold text // “GFDL” redirects here. ...


External links

  • Data Sheet for the 16550D UART (PDF)


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  Results from FactBites:
 
WH Networks - Windows 16550 UART Questions (765 words)
This UART and the improved 16450 version are limited to one input register that holds only one byte at a time.
These UARTs are not usually suitable for modem speeds greater than 9600 bits per second (BPS) because of possible input data overruns that can occur if a character is left in the input register when the next byte is received.
Instead, the UART remains in the 8250 UART compatibility mode, allowing one byte to be received at a time.
Universal asynchronous receiver/transmitter - Wikipedia, the free encyclopedia (1447 words)
UARTs are commonly used in conjunction with other communication standards such as EIA RS-232.
A UART is usually an individual (or part of an) integrated circuit used for serial communications over a computer or peripheral device serial port.
The UART is a subset of "asynchronous receiver/transmitters" in that UARTs adds the ability to receive and transmit serial data using different serial bit rates.
  More results at FactBites »


 

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