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Browse Prior Art Database

SMART SERIAL ADAPTER

IP.com Disclosure Number: IPCOM000008581D
Original Publication Date: 1998-Mar-01
Included in the Prior Art Database: 2002-Jun-25
Document File: 2 page(s) / 82K

Publishing Venue

Motorola

Related People

Horst Geib: AUTHOR [+2]

Abstract

During daily work a lot of people working with computers must solve the problem of adopting different serial communication devices. Most of the connections need a customized serial connection cable. The smart serial adapter avoids additional work and costs for searching, building and looking up serial wire configurations. Currently there exists fixed wire connections which demand for every different application a dedicated serial connection cable or connection box equipped with DIP-switches which allow only a ON/OFF behavior.

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MOTOROLA Technical Developments

8

SMART SERIAL ADAPTER

by Horst Geib and Klaus-Dieter Demant

  During daily work a lot of people working with computers must solve the problem of adopting different serial communication devices. Most of the connections need a customized serial connection cable. The smart serial adapter avoids additional work and costs for searching, building and looking up serial wire configurations. Currently there exists fixed wire connections which demand for every different application a dedicated serial connection cable or connection box equipped with DIP-switches which allow only a ON/OFF behavior.

  The smart serial adapter proposed in this paper uses an automatic recognition of the serial transmitting and receive lines on both of the serial connected devices. Transmit (TX) lines will be recognized by

the defined logical high or low level. Receive (RX) lines will be switched by the standard assignment opposite the TX lines. The integrated control logic connects the desired lines via analog switch units. The control logic circuit for automated RX/TX line detection also recognizes specific commands for null, modem and printer port functions. Due to the very small power consumption of state of the art
(3.3 Volt) integrated circuits technology the necessary energy for the control logic and switch units is pro- vided by the dynamic RX/TX signals and by static signals like CTS. Additionally it is possible to show the current detected state of the seri...