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Switch input processing module for switching signal transmission lines to transmit different types of signals

  • US 6,704,829 B1
  • Filed: 11/13/2000
  • Issued: 03/09/2004
  • Est. Priority Date: 11/24/1999
  • Status: Expired due to Fees
First Claim
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1. A switch input processing module comprising:

  • a control unit;

    an external connection terminal containing a first external connection terminal and a second external connection terminal;

    an analog signal transmission line and a serial signal transmission line each of which is disposed between the first external connection terminal and the control unit;

    a determination signal applied to the second external connection terminal indicating that either an analog multiplex or a serial multiplex is connected to the first external connection terminal, said analog multiplex and said serial multiplex each containing a plurality of switches; and

    , wherein when the control unit determines that the determination signal indicates connection of the serial multiplex, the control unit makes the serial signal transmission line conductive, and when the control unit determines that the determination signal indicates connection of the analog multiplex, the control unit makes the serial signal transmission line nonconductive.

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