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US 2003/0151427 A1Published application
Programmable driver for an I/O pin of an integrated circuit
AssigneeSilicon Labs CP, Inc.
InventorsDouglas S. Piasecki, Alvin C. Storvik II
Life of this patent
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Abstract
A pin interface for an integrated circuit. The pin interface includes logic gates for processing digital signals, and analog lines for carrying analog signals. The pin interface includes circuits for disabling the digital circuits when configured to carry analog signals.
Claims19
A pin interface for an integrated circuit, comprising:
- a conductive pad formed on said integrated circuit for coupling signals thereto;
- digital circuits formed in said integrated circuit for coupling digital signals to said pad;
- and
- at least one analog line formed in said integrated circuit for carrying analog signals between said analog line and said pad.
1 more element
A pin interface for an integrated circuit, comprising:
- a contact pad formed on said integrated circuit;
- a pair of transistors joined together at a junction to define a push-pull driver, said junction connected to said contact pad;
- a first logic circuit for driving said pair of transistors into opposite states of conduction, and for driving said junction to a high impedance state;
- an analog line coupled to said contact pad for carrying analog signals;
- and
- an analog switch coupled in said analog line, and controlled by a control signal for controlling the coupling of analog signals on said analog line.
3 more elements
Dependencies are inferred from the claim text.