Data transfer circuit for use with a base unit or a handset of a

Details Data transfer circuit for use with a base unit or a handset of a Data transfer circuit for use with a base unit or a handset of a

1996-02-09

1997-08-12

Chin, Stephen

Pulse or digital communications

Synchronizers

370474, 455462, H04L 700

Patent

active

056574649

ABSTRACT:
A data transfer circuit for use with a base unit or a handset of a telephone system includes a switch circuit and a shift register. The switch circuit selects parallel fixed data or parallel input data, and outputs the selected data. The switch circuit is connected to inputs indicating whether the data transfer circuit is connected to a base unit or a handset for modifying the parallel fixed data in response to the indication. The shift register has two modes. In the first mode, the data selected and output by the switch circuit is loaded into the shift register in parallel. In the second mode, the loaded data is output from the shift register in series.

REFERENCES:
patent: 3533102 (1970-10-01), Rowe
patent: 4418418 (1983-11-01), Aoki
patent: 5426784 (1995-06-01), Kawata et al.

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