Method for synchronously transferring serial data to and from an

Details Method for synchronously transferring serial data to and from an Method for synchronously transferring serial data to and from an

1995-05-18

1996-09-10

Barry, Lance L.

Excavating

395881, 39520017, 371 70, 364DIG1, 3642219, 3642387, 3642711, 3642712, 3642714, G06F 1310

Patent

active

055554385

ABSTRACT:
An industrial controller Input/Output module includes on-board processing circuitry in the form of a microprocessor and associated memory, a first programmable logic circuit and a second programmable logic circuit connected through an isolation interface. The isolation interface is comprised of optical coupling circuits. The programmable logic circuits are programmed to provide circuitry for parallel-to-serial data conversion of 24 bits of system Input/Output data on each side of the isolation interface. The data is then transferred as serial data in both directions at once in response to a shift clock signal. The data signals and the shift clock signal utilize three one-bit optical coupling devices in the isolation interface. After transfer across the isolation interface, the system Input/Output data is converted to parallel data for further processing.

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