Multi-port type universal asynchronous receiver/ transmitter sys

Details Multi-port type universal asynchronous receiver/ transmitter sys Multi-port type universal asynchronous receiver/ transmitter sys

1997-04-30

1999-07-13

Hofsass, Jeffery A.

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

370477, 370280, 370279, H04J 300

Patent

active

059236701

ABSTRACT:
A multi-port universal asynchronous receiver/transmitter (UART) system is disclosed having time division multiplexing and demultiplexing. The system has plural UART's and includes a time slot generating unit for generating time slot signals corresponding to defined time slots which correspond in number to the plurality of UART's. A receiving data separating unit separates a single stream of received data into a plurality of receiving data streams to correspond with the time slots. Plural receiving data control units time expand respective ones of the separated receiving data streams. The UART's each receive a respective one of the time expanded receiving data streams and output them to an appliance, such as a computer. The UART's also receive data, from the appliance, for transmission. Plural transmitting data control units each receive a stream of transmitting data from a respective one of the plurality of UART's. The transmitting data control units each time compress their respective data streams and align the compressed data bits with a corresponding time slot. A transmitting data coupling unit receives the compressed data bits from the transmitting data control units and couples them into a single data line. The disclosed multi-port UART system is capable of using a single transmitting line and a single receiving line, thereby reducing the cost of the appliance due to simplification of circuitry and reducing cost of system installation due to a reduction in the number of transmitting and receiving lines.

REFERENCES:
patent: 5799208 (1998-08-01), Hwang et al.

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