Controller for two-way serial transmission and adapter for seria

Details Controller for two-way serial transmission and adapter for seria Controller for two-way serial transmission and adapter for seria

1995-03-07

1997-09-16

Ruggiero, Joseph

Boots, shoes, and leggings

364DIG1, 3642386, 395309, G06F 1900, G06F 1320

Patent

active

056687168

ABSTRACT:
A controller performs two-way serial communications between a plurality of devices at one time through a reduced number of data communication lines by use of a serial communication line and a serial port adapter connected to a CPU and an external device. The controller includes the CPU, a serial communication device constituting the adapter, and a discriminator. The serial communication device includes an interface having output and input ports, an output buffer circuit, an input buffer circuit and a data I/O terminal for transferring data. The output port is connected via the output buffer circuit to the data I/O terminal. The data I/O terminal is connected also to the input port via the input buffer circuit. A single two-way serial data communication line is thus formed. The discriminator is provided in the CPU when a specified identification code is inputted to the input port of the serial communication device, data can be received.

REFERENCES:
patent: 4814761 (1989-03-01), Takahashi et al.
patent: 5134702 (1992-07-01), Charych et al.
patent: 5159684 (1992-10-01), Kroll et al.
patent: 5381529 (1995-01-01), Matsushima
patent: 5436897 (1995-07-01), Cook
patent: 5440301 (1995-08-01), Evans
patent: 5457786 (1995-10-01), Roush
patent: 5459453 (1995-10-01), Minerd et al.
patent: 5485397 (1996-01-01), Yamazato et al.

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