Serial transmission apparatus having an operation surely carried

Details Serial transmission apparatus having an operation surely carried Serial transmission apparatus having an operation surely carried

1994-10-27

1997-03-18

Heckler, Thomas M.

395854, 395877, G06F 1338

Patent

active

056131046

ABSTRACT:
For surely carrying out interruption operation of a serial transmission apparatus responsive to a serial datum even if the serial datum is represented by an unknown number of data bits transmitted in series, an interruption signal producing circuit produces an interruption request signal in response to at least one of an overflow signal and an end signal which is representative of an end of the serial datum. Supplied with the serial datum, a shift register memorizes the serial datum within a predetermined bit length. When the shift register is filled with the serial datum, a counter produces the overflow signal. Responsive to the interruption request signal, an interruption circuit carries out the interruption operation to process the memorized datum.

REFERENCES:
patent: 4542457 (1985-09-01), Mortensen et al.
patent: 5274764 (1993-12-01), Kim
patent: 5390299 (1995-02-01), Rege et al.
patent: 5455913 (1995-10-01), Shrock et al.
patent: 5485583 (1996-01-01), Cunningham et al.

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