Ic with digital and analog circuits and mixed signal i/o pins
AssigneeCygnal Integrated Products, Inc.
InventorsDouglas S. Piasecki, Alvin C. Storvik II
Life of this patent
Estimating the term…
Abstract
An integrated circuit providing mixed signal processing. I/O pin interface circuits include logic gates and other circuits for processing digital and analog signals. Processor-controlled configuration circuits allow the various I/O pin interface circuits to process either analog or digital circuits. The I/O pins can be configured for digital or analog operation on the fly.
Claims19
An integrated circuit having I/O pin interface circuits providing digital and analog functions, comprising:
- digital circuits and at least one analog circuit formed on said integrated circuit;
- a plurality of contact pads formed on said integrated circuit;
- a multiplexer circuit;
- a plurality of I/O pin interface circuits, each I/O pin interface circuits associated with a respective said contact pad, each said I/O pin interface circuit coupling digital signals between the respective contact pads and said digital circuits, at least some of said I/O pin interfaces coupling analog signals between said contact pads and said multiplexer circuit;
- and
- said multiplexer circuit coupled between said I/O pin interface circuits and said analog circuit for selectively coupling signals between said analog circuit and said I/O pin interface circuits.
An integrated circuit having I/O pin interface circuits providing digital and analog functions, comprising:
- at least one analog circuit formed on said integrated circuit;
- a plurality of said I/O pin interface circuits formed on said integrated circuit, each said pin interface circuits functioning to couple therethrough digital and analog signals;
- and
- a selector for selecting an analog path between at least one said pin interface circuits and said analog circuit.
An integrated circuit having I/O pin interface circuits providing digital and analog functions, comprising:
- digital circuits and at least one analog signal processing circuit formed on said integrated circuit;
- a plurality of said I/O pin interface circuits, each said I/O pin interface circuit adapted for carrying analog and digital signals therethrough;
- and
- a multiplexer coupled between said I/O pin interface circuits and said analog signal processing circuits, said multiplexer controlled so that analog signals can be coupled between said analog signal processing circuits and a selected one of said I/O pin interface circuits.
Dependencies are inferred from the claim text.