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INS8250 - Asynchronous Receiver/Transmitter

Datasheet Summary

Description

Each of these parts function as a serial data input/output interface in a microcomputer system.

The system software determines the functional configuration of the UART via a TRI-STATE® 8-bit bidirectional data bus.

Features

  • Easily interfaces to most popular microprocessors.
  • Adds or deletes standard asynchronous communication bits (start, stop, and parity) to or from serial data stream.
  • Holding and shift registers eliminate the need for pre­ cise synchronization between the CPU and the serial data.
  • Independently controlled transmit, receive, line status, and data set interrupts.
  • Programmable baud generator allows division of any in­ put clock by 1 to (216 - 1) and generates the internal.

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Datasheet preview – INS8250

Datasheet Details

Part number INS8250
Manufacturer National Semiconductor
File Size 1.59 MB
Description Asynchronous Receiver/Transmitter
Datasheet download datasheet INS8250 Datasheet
Additional preview pages of the INS8250 datasheet.

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Full PDF Text Transcription

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INS8250/INS8250-B National Sem iconductor INS8250, INS8250-B Universal Asynchronous Receiver/Transmitter General Description Each of these parts function as a serial data input/output interface in a microcomputer system. The system software determines the functional configuration of the UART via a TRI-STATE® 8-bit bidirectional data bus. The UART performs serial-to-parallel conversion on data characters received from a peripheral device or a MODEM, and parallel-to-serial conversion on data characters re­ ceived from the CPU. The CPU can read the complete status of the UART. Status information reported includes the type and condition of the transfer operations being per­ formed by the UART, as well as any error conditions (parity, overrun, framing, or break interrupt).
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