COMMUNICATION CHANNEL CALIBRATION USING FEEDBACK
First Claim
1. A bus system interface for a bus system including a plurality of communication channels, the communication channels interconnecting transmitters on another component with the bus system interface, comprising:
- a plurality of interface circuits adapted to be connected to corresponding communication channels in the bus system, the interface circuits including receivers;
a plurality of sensors coupled with corresponding interface circuits in the plurality of interface circuits, which sense characteristics of data signals received at the corresponding interface circuits; and
logic coupled with the plurality of sensors, which accumulates information about the sensed characteristics of the data signals and transmits the information for use in control of the transmitters on the other component.
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Accused Products
Abstract
A method for calibrating a communication channel coupling first and second components includes transmitting a data signal from the first component to the second component on the communication channel, and sensing a characteristic, such as phase, of the data signal on the second component. Information about the sensed characteristic is fed back to the first component using an auxiliary channel. An adjustable parameter, such as phase, for the transmitter is adjusted on the first component in response to the information. Also, a characteristic of a data signal received from the transmitter on the second component is sensed and used to adjust an adjustable parameter for the receiver on the first component.
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Citations
26 Claims
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1. A bus system interface for a bus system including a plurality of communication channels, the communication channels interconnecting transmitters on another component with the bus system interface, comprising:
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a plurality of interface circuits adapted to be connected to corresponding communication channels in the bus system, the interface circuits including receivers; a plurality of sensors coupled with corresponding interface circuits in the plurality of interface circuits, which sense characteristics of data signals received at the corresponding interface circuits; and logic coupled with the plurality of sensors, which accumulates information about the sensed characteristics of the data signals and transmits the information for use in control of the transmitters on the other component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A bus system interface for bus system including a plurality of communication channels, the communication channels interconnecting receivers on another component with the bus system interface, comprising:
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a plurality of interface circuits adapted to be connected to corresponding communication channels in the bus system, the interface circuits including transmitters and receivers for corresponding communication channels in the plurality of communication channels, wherein the transmitters have adjustable parameters which affect characteristics of transmitted data signals; logic which reads information received from the other component, indicating sensed characteristics of data signals received at the other component, and adjusts the adjustable parameters for the transmitters in the plurality of interface circuits using the information. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification