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US 8,786,482 B1Granted
Integrated circuit with pin for setting digital address
AssigneeLattice Semiconductor Corporation
InventorsRobert Bartel, Spiro Sassalos
Life of this patent
Estimating the term…
Abstract
In one embodiment, an integrated circuit includes a pin and a current source for driving current through the pin into an external resistor such as a resistor on a circuit board to generate a pin voltage. The integrated circuit includes an analog-to-digital converter for converting the pin voltage into a digital value, such as an address for the integrated circuit.
Claims20
An integrated circuit, comprising:
- a pin;
- a current source within the integrated circuit configured to drive a current through the pin;
- and
- an analog-to-digital converter within the integrated circuit configured to compare a voltage of the pin to a succession of internal voltages to provide a digital value.
1 more element
A method, comprising:
- driving an internal current generated within an integrated circuit through a pin of the integrated circuit into a resistor external to the integrated circuit to generate a pin voltage on the pin;
- and
- in the integrated circuit, converting the pin voltage into a digital value,
- wherein converting the pin voltage into a digital value comprises comparing the pin voltage to a succession of different voltages within the integrated circuit.
1 more element
An integrated circuit, comprising:
- a pin;
- a current source within the integrated circuit configured to drive a current through the pin;
- and
- an analog-to-digital converter within the integrated circuit, the analog-to-digital converter including:
- a comparator configured to compare a voltage on the pin to an internal voltage;
- a counter responsive to the comparator to provide a digital value;
- and
- a multiplexer responsive to the counter and configured to select the internal voltage for comparison to the voltage on the pin.
5 more elements
Dependencies are inferred from the claim text.