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Controller for two-way serial transmission and adapter for serial port

  • US 5,668,716 A
  • Filed: 03/07/1995
  • Issued: 09/16/1997
  • Est. Priority Date: 03/08/1994
  • Status: Expired due to Fees
First Claim
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1. A controller having a two-way serial communication function, comprising:

  • a central processing unit; and

    a serial communication device connected to said central processing unit, and including an interface having a serial data output port for outputting data transmitted from said central processing unit, and a serial data input port for inputting data transmitted to said central processing unit, said device further including an output buffer circuit, an input buffer circuit, and a data I/O terminal for transferring serial data to and from the outside;

    said data I/O terminal being connected to said serial data output port via said output buffer circuit, and said data I/O terminal being connected to said serial data input port via said input buffer circuit, such that two-way serial data communication with said central processing unit can be conducted via said data I/O terminal and said serial data output and input ports.

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