UART$94630$ - definition. What is UART$94630$
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%ما هو (من)٪ 1 - تعريف

INTEGRATED CIRCUIT SERIAL PORT IMPLEMENTATION
16550; NS16550; 16554 UART; 16650 UART; 16C550; 16550AF; 16550C; 16550CF; 16550 (UART); 16550A; 16550AFN; 16550D; NS16550A
  • National Semiconductor NS16550AFN

UART         
  • Example of a UART frame. In this diagram, one [[byte]] is sent, consisting of a start bit, followed by eight data bits (D0-7), and two stop bit, for a 11-bit UART frame. The number of data and formatting bits, the presence or absence of a parity bit, the form of parity (even or odd) and the transmission speed must be pre-agreed by the communicating parties. The "stop bit" is actually a "stop period"; the stop period of the transmitter may be arbitrarily long. It cannot be shorter than a specified amount, usually 1 to 2 bit times. The receiver requires a shorter stop period than the transmitter. At the end of each data frame, the receiver stops briefly to wait for the next start bit. It is this difference which keeps the transmitter and receiver synchronized.
BCLK = Base Clock
COMPUTER HARDWARE DEVICE
UART; Serial uart; UART overrun; Uart; Universal asynchronous receiver transmitter; Serial Communication Interface; 16450; Serial Communication Controller; Universal asynchronous receiver/transmitter; 16C450; 16450 UART; 16450 (UART); NS16450; PC16450C; Serial communication interface; Motorola 6850
UART         
  • Example of a UART frame. In this diagram, one [[byte]] is sent, consisting of a start bit, followed by eight data bits (D0-7), and two stop bit, for a 11-bit UART frame. The number of data and formatting bits, the presence or absence of a parity bit, the form of parity (even or odd) and the transmission speed must be pre-agreed by the communicating parties. The "stop bit" is actually a "stop period"; the stop period of the transmitter may be arbitrarily long. It cannot be shorter than a specified amount, usually 1 to 2 bit times. The receiver requires a shorter stop period than the transmitter. At the end of each data frame, the receiver stops briefly to wait for the next start bit. It is this difference which keeps the transmitter and receiver synchronized.
BCLK = Base Clock
COMPUTER HARDWARE DEVICE
UART; Serial uart; UART overrun; Uart; Universal asynchronous receiver transmitter; Serial Communication Interface; 16450; Serial Communication Controller; Universal asynchronous receiver/transmitter; 16C450; 16450 UART; 16450 (UART); NS16450; PC16450C; Serial communication interface; Motorola 6850
Universal Asynchronous Receive and Transmit
16450         
  • Example of a UART frame. In this diagram, one [[byte]] is sent, consisting of a start bit, followed by eight data bits (D0-7), and two stop bit, for a 11-bit UART frame. The number of data and formatting bits, the presence or absence of a parity bit, the form of parity (even or odd) and the transmission speed must be pre-agreed by the communicating parties. The "stop bit" is actually a "stop period"; the stop period of the transmitter may be arbitrarily long. It cannot be shorter than a specified amount, usually 1 to 2 bit times. The receiver requires a shorter stop period than the transmitter. At the end of each data frame, the receiver stops briefly to wait for the next start bit. It is this difference which keeps the transmitter and receiver synchronized.
BCLK = Base Clock
COMPUTER HARDWARE DEVICE
UART; Serial uart; UART overrun; Uart; Universal asynchronous receiver transmitter; Serial Communication Interface; 16450; Serial Communication Controller; Universal asynchronous receiver/transmitter; 16C450; 16450 UART; 16450 (UART); NS16450; PC16450C; Serial communication interface; Motorola 6850
<hardware> A UART with a one-byte FIFO buffer. The 16450 is a higher speed, fixed version of the 8250. It was superseded by the 16550. The 16450 was used for the IBM PC AT and PS/2 but will not work in a IBM PC XT. (2004-03-21)

ويكيبيديا

16550 UART

The 16550 UART (universal asynchronous receiver-transmitter) is an integrated circuit designed for implementing the interface for serial communications. The corrected -A version was released in 1987 by National Semiconductor. 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. It was the first serial chip used in the IBM PS/2 line, which were introduced in 1987.

The part was originally made by National Semiconductor. Similarly numbered devices, with varying levels of compatibility with the original National Semiconductor part, are made by other manufacturers. A UART function that is register-compatible with the 16550 is usually a feature of multifunction I/O cards for IBM PC-compatible computers and may be integrated on the motherboard of other compatible computers.

Replacement of the factory-installed 8250 UART was a common upgrade for owners of IBM PC, XT, and compatible computers when high-speed modems became available. Above 9600 baud, owners discovered that the serial ports of the computers were not able to handle a continuous flow of data without losing characters. Exchange of the 8250 (having only a one-byte received data buffer) with a 16550, and occasionally patching or setting system software to be aware of the FIFO feature of the new chip, improved the reliability and stability of high-speed connections.