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US 8,618,844 B2Granted
Level-shifting interface for a processor-based device
AssigneeSilicon Laboratories Inc.
InventorsThomas S. David, Paul I. Zavalney
Life of this patent
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Abstract
An apparatus includes an integrated circuit, which includes an input terminal, a second terminal to communicate with circuitry external to the integrated circuit, a multiplexer, a level shifter and a processor. The multiplexer is adapted to selectively couple the input terminal, the level shifter and the second output terminal together.
Claims17
A method comprising:
- providing an integrated circuit comprising a processor and a driver circuit to drive a first signal to an externally accessible output terminal of the integrated circuit;
- adapting the integrated circuit to selectively level shift a second signal received at an externally accessible input terminal of the integrated circuit to provide a level shifted second signal to the driver;
- and
- adapting the integrated circuit to selectively level shift a third signal generated by a component of the integrated circuit and provide the level shifted third signal to the driver.
1 more element
An apparatus comprising:
- an integrated circuit comprising a plurality of input terminals, a plurality of second terminals to communicate with circuitry external to the integrated circuit, a plurality of multiplexers, a plurality of level shifters, and a processor;
- wherein the plurality of multiplexers are adapted to selectively couple the input terminals, the level shifters and the second terminals together.
An apparatus comprising:
- an integrated circuit comprising an input terminal, a second terminal to communicate with circuitry external to the integrated circuit, a multiplexer, a level shifter, and a processor;
- wherein the processor is adapted to selectively configure the multiplexer to couple the input terminal, the level shifter and the second terminal together based at least in part on at least one user supplied configuration setting.
Dependencies are inferred from the claim text.