Multiplexing bus controller with input conditioning

Details Multiplexing bus controller with input conditioning Multiplexing bus controller with input conditioning

1993-07-07

1999-09-07

Maung, Zarni

Electrical computers and digital data processing systems: input/

Input/output data processing

712244, 395500, G06F 1300

Patent

active

059480734

ABSTRACT:
A multiplexing bus controller with input conditioning is provided in which the need for a dedicated microprocessor for handling input filtering, input change detection and serial-to-parallel/parallel-to-serial I/O data conversion is eliminated. The controller is realized in a gate array and provides input data oversampling and output refreshing to eliminate random noise coupled to the data lines. In addition, the oversampled data is filtered to debounce the signal received from the input devices. The input data is converted from serial-to-parallel and checked to detect any change from the previous input data stream. Upon detection of an input change, the host microprocessor is interrupted. When the host microprocessor sends data to the bus controller, the bus controller then converts the data to a serial stream for communication to the appropriate output device. Additionally, the bus controller is provided with an internal turnaround circuit to loop back outputs to the inputs for diagnostic purposes. Very low gate counts realized in the design of the multiplexing bus controller allow it to be realized on a single chip.

REFERENCES:
patent: 4120034 (1978-10-01), Fisk et al.
patent: 4266294 (1981-05-01), Daughton et al.
patent: 4404651 (1983-09-01), Crudowski
patent: 4497041 (1985-01-01), Braun
patent: 4550382 (1985-10-01), Federico et al.
patent: 4787024 (1988-11-01), Allsop et al.
patent: 4910658 (1990-03-01), Dudash et al.
patent: 5037308 (1991-08-01), Bryce et al.
patent: 5044964 (1991-09-01), Minerd et al.
patent: 5087940 (1992-02-01), Altman
patent: 5097470 (1992-03-01), Gihl
patent: 5233346 (1993-08-01), Minerd et al.

Affiliated with

Also associated with

Rating

Multiplexing bus controller with input conditioning does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multiplexing bus controller with input conditioning, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiplexing bus controller with input conditioning will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1800011