Input/output multiplexer bus
First Claim
Patent Images
1. An apparatus, comprising:
- a plurality of input/output (“
I/O”
) ports;
measurement circuitry to measure one or more electrical properties of one or more devices to be externally coupled to one or more of the I/O ports; and
a I/O multiplexer bus coupled between the I/O ports and the measurement circuitry, the I/O multiplexer bus programmable to selectively couple the measurement circuitry to any of the I/O ports.
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Abstract
An input/output (“I/O”) system includes a plurality of input/output (“I/O”) ports, measurement circuitry, and an I/O multiplexer bus. The measurement circuitry is coupled to measure one or more electrical properties of one or more devices to be externally coupled to one or more of the I/O ports. The I/O multiplexer bus is coupled between the I/O ports and the measurement circuitry. The I/O multiplexer bus is programmable to selectively couple the measurement circuitry to any of the I/O ports.
132 Citations
20 Claims
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1. An apparatus, comprising:
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a plurality of input/output (“
I/O”
) ports;measurement circuitry to measure one or more electrical properties of one or more devices to be externally coupled to one or more of the I/O ports; and a I/O multiplexer bus coupled between the I/O ports and the measurement circuitry, the I/O multiplexer bus programmable to selectively couple the measurement circuitry to any of the I/O ports. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus, comprising:
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a plurality of input/output (“
I/O”
) means for conveying analog signals into and out of an integrated circuit;measurement means for measuring one or more electrical properties of one or more devices to be externally coupled to one or more of the I/O means; and means for time-sharing the measurement means across the plurality of I/O means, wherein the means for time-sharing is programmable to selectively individually couple the measurement means to any of the I/O means. - View Dependent Claims (11, 12, 13, 14)
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15. A method, comprising:
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sequentially connecting each one of a plurality of variable capacitance switches of a capacitance sense user interface to a signal source via an input/output (“
I/O”
) multiplexer bus;reciprocally charging and discharging each of the variable capacitance switches through the I/O multiplexer bus; and sequentially connecting each one of the plurality of variable capacitance switches to capacitance measurement circuitry via the I/O multiplexer bus to monitor a capacitance of each of the variable capacitance switches. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification