The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 1992
Filed:
Mar. 12, 1992
Jules D Campbell, Jr, Austin, TX (US);
William D Huston, Austin, TX (US);
William P Laviolette, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An analog-to-digital conversion system module comprises a pin-limited A/D converter integrated circuit (I.C.) to which at least one multiplexer I.C. may be coupled and sampled. In one embodiment, host system software involvement is minimized by providing a sequence of sample commands, implemented by a channel sequencer or a programmable control table comprising a plurality of conversion command words (CCW's). A set of CCW's defines a conversion sequence which may be initiated and performed with minimal host system software involvement, upon conclusion of which a result table storing the converted digital values may be read by an associated device, such as a CPU. In one embodiment, some I/O pins of the A/D converter I.C. function either as analog inputs or address outputs to the external multiplexer, while other analog input pins alternatively function as single input channels or as combined channels from one or more external multiplexers. A software-loadable control register comprises a control field for a control word which determines the function of the programmable pins.