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RS232C Self Switching

IP.com Disclosure Number: IPCOM000123071D
Original Publication Date: 1998-May-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 1 page(s) / 16K

Publishing Venue

IBM

Related People

Funahashi, T: AUTHOR

Abstract

Micro controller CPU (Central Processing Unit) having the following function: 1. External switching mechanism of RS232C 2. Control line to switch the 232C lines, ffor example Parallel Input/Output (PIO) (MERITS) Micro controllers, like Z80, has limited number of SIO (serial Input/Ouput) port(RS232C). To increase it, we have to add SIO chips on the board. It causes cost up.

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RS232C Self Switching

   Micro controller CPU (Central Processing Unit) having the
following function:
  1.  External switching mechanism of RS232C
  2.  Control line to switch the 232C lines, ffor example
       Parallel Input/Output (PIO)
        (MERITS)
  Micro controllers, like Z80, has limited number of SIO (serial
   Input/Ouput) port(RS232C).  To increase it, we have to add SIO
   chips on the board.  It causes cost up.