Communication channel calibration using feedback
First Claim
1. An integrated circuit (IC) chip, comprising:
- an interface circuit including a transmitter configured to transmit data signals along a wired link to a destination IC chip, the data signals carrying a sequence of data symbols;
calibration circuitry including a receiver, to receive timing drift information from the destination IC chip, the timing drift information associated with sensed phase information of the data signals received at the destination IC chip; and
logic to adjust a timing parameter associated with the transmitted data signals based on the received timing drift information.
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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
20 Claims
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1. An integrated circuit (IC) chip, comprising:
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an interface circuit including a transmitter configured to transmit data signals along a wired link to a destination IC chip, the data signals carrying a sequence of data symbols; calibration circuitry including a receiver, to receive timing drift information from the destination IC chip, the timing drift information associated with sensed phase information of the data signals received at the destination IC chip; and logic to adjust a timing parameter associated with the transmitted data signals based on the received timing drift information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An integrated circuit (IC) chip, comprising:
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an interface circuit including a transmitter configured to transmit data signals along a wired link, the data signals carrying a sequence of data symbols; calibration circuitry including a receiver including a port, to receive timing drift information from a destination of the data signals, wherein the port is coupled to a pin on the IC chip, and wherein the pin comprises a scan out port; and logic to adjust a timing parameter associated with the transmitted data signals based on the received timing drift information. - View Dependent Claims (10, 11)
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12. A method of operation in an integrated circuit (IC) memory controller, the method comprising:
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transmitting data signals along a wired link, the data signals including a sequence of data symbols representing data; calibrating a timing parameter associated with the data signals by receiving sensed information from a destination of the data signals, the sensed information associated with a parameter of the data signals received at the destination; and adjusting a timing parameter associated with the transmitted data signals based on the received sensed information. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification