16C550 UART DATA SHEET PDF

Features[ edit ] Main features of the include: The ability to convert data from serial to parallel, and from parallel to serial, using shift registers. An on-chip bit rate baud rate generator to control transmit and receive data rate. Handshake lines for control of an external modem , controllable by software. An interrupt function to the host microprocessor. An on-chip FIFO buffer for both incoming and outgoing data; this gives the host system more time to respond to an interrupt generated by the UART, without loss of data. The current version since by Texas Instruments which bought National Semiconductor is called the D.

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The Art of Serial Communication. The part was originally made by National Semiconductor. Technical and de facto standards for wired computer buses. At speeds higher than baudowners discovered that the serial ports of the computers were not able to handle a continuous flow of data without losing characters. The also incorporates a transmit FIFO, though this feature is less critical as delays in interrupt service would only result in sub-optimal transmission speeds and not actual data loss.

This page was last edited on 28 Novemberat To overcome these shortcomings, the series UARTs incorporated a byte FIFO buffer with a programmable interrupt xatasheet of 1, 4, 8, or 14 bytes. The C and CF models are okay too, according to this source.

By using this site, you agree to the Terms of Use and Privacy Policy. More critically, datashet only a 1-byte buffer there is a genuine risk that a received byte will be overwritten if interrupt service delays occur. Similarly numbered devices, with varying levels of compatibility with the original National Semiconductor part, are made by other manufacturers.

Not all manufacturers adopted this nomenclature, however, continuing to refer to the fixed chip as a National Semiconductor later released the A which corrected datssheet issue. This generated high rates of interrupts as transfer speeds increased. The A F version was a must-have to use modems with a data transmit rate of baud. The corrected -A version was released in by National Semiconductor.

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16550 UART

The Art of Serial Communication. The part was originally made by National Semiconductor. Technical and de facto standards for wired computer buses. At speeds higher than baudowners discovered that the serial ports of the computers were not able to handle a continuous flow of data without losing characters. The also incorporates a transmit FIFO, though this feature is less critical as delays in interrupt service would only result in sub-optimal transmission speeds and not actual data loss. This page was last edited on 28 Novemberat To overcome these shortcomings, the series UARTs incorporated a byte FIFO buffer with a programmable interrupt xatasheet of 1, 4, 8, or 14 bytes. The C and CF models are okay too, according to this source.

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