Multiplexing I/O module

Details Multiplexing I/O module Multiplexing I/O module

1980-03-17

1982-11-23

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

375 36, 364200, 364900, H04J 600

Patent

active

043609139

ABSTRACT:
A preferred embodiment of an input module is connected through six address terminals and four data terminals to six banks of contacts. A single bank address is coupled to two latches in the module and then to two banks of contacts. A nibble of data is coupled from each of two banks of contacts to each of two corresponding data latches on the module. The sequential addressing of a low nibble bank and a high nibble bank and the latching of data therefrom is controlled by sequencing circuitry which is enabled each time a bank address is written to the module. In a second embodiment coded information is output through the six address terminals and decoded by two external decoders to multiplex 256 inputs to the processor. Such modules are particularly useful in multiplexing a large number of inputs to the processor of a programmable controller.

REFERENCES:
patent: 3678205 (1972-07-01), Cohen
patent: 3692942 (1972-09-01), Inose
patent: 3705267 (1972-12-01), Marino
patent: 3959596 (1976-05-01), Bojanek
patent: 4040028 (1977-08-01), Pauker
patent: 4160126 (1979-07-01), Bojanek
patent: 4160876 (1979-07-01), Bojanek

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