Method and apparatus for multi-channel data delay equalization

A method for equalizing a reception of data signals in a plurality of input channels in a device, the method comprising:

• receiving a data signal from each of the plurality of input channels in the device and a reference signal;
• identifying a delay between a transition in the data signal and a transition in the reference signal on each channel of the plurality of input channels, based on a periodic timing reference, to form a plurality of delays;
• and
• using the plurality of delays to adjust a delay in a reception of a data signal on each channel within the set of input channels to increase a setup and a hold time for the plurality of data signals.

A data processing system comprising:

• a plurality of data lines;
• a host device connected to the plurality of data lines, wherein the host device transmits a data signal on each of the plurality or data lines to form a set or transmitted data signals and transmits another signal;
• and
• a target device connected to the plurality of data lines, wherein the target device receives the set of transmitted data signals, nicasures a delay between a transmitted data signal in the set of transmitted data signals and the another signal for each of the plurality of transmitted data signals, based on a periodic timing reference, to generate a sot of delay values, adjusts a delay at the target device for each of the plurality of data lines based on the set of delay values.

A channel delay apparatus comprising.

• a delay adjustment unit, a first set of inputs for receiving data from a plurality of data channels, a second set of inputs for receiving, a set of delay values, and set of outputs at which the data received at the first set of inputs is transmitted, and a delay mechanism, wherein the delay mechanism delays travelling from the first set of inputs to the set of outputs based on the set of delay values, wherein data for a data channel in the set of data channels is delayed relative to data for another data channel in the set of data channels using a delay value from the set of delay values;
• a delay counter unit having a first set of inputs for receiving data from the plurality of data channels and a reference signal from a signal line and a set of outputs, wherein the delay counter unit is based on a periodic timing reference and measures a delay between data in each of the plurality of data channels and the reference signal on the signal line and generates a set of measured delay values at the set of outputs;
• and
• a delay adjustment calculation unit having a plurality of inputs corrected to the set of outputs in the delay counter and a set of outputs connected to the second set of inputs in the delay adjustment unit, wherein the delay calculation unit generates the set of delay values using the set of measured delay values.

A data processing system for managing reception of data signals on a plurality of data lines, the data processing system comprising:

• reciving means for receiving data signals on the plurality of data lines and a reference signal;
• measuring means for measuring a delay between the data signal and the reference signal on each of the plurality of data lines, based on a periodic timing reference to form a plurality of delay measurements;
• generating means for generating a set of delay values from the plurality of delay measurements;
• and
• using means for using the set or delay values to adjust delay in a reception in each of the plurality of data signals in the plurality of data lies.

A data processing system for equalizing a reception of data signals in a plurality of input channels in a device, tie data processing system comprising:

• receiving means for receiving a data signal form each of the plurality of input channels in the device and a reference signal;
• identifying means for identifying a delay between a transition in the data signal and a transition in the reference signal on each channel of the plurality of input channels, based on a periodic timing reference, to form a plurality of delays;
• and
• using means for using the plurality of delays to adjust a delay in a reception of a data signal on each channel within the set of input channels to increase a setup and a hold time for the plurality of data signals.

A computer program product in a computer readable medium for managing transmission of data signals on plurality of data lines, the computer program product comprising:

• first instructions for receiving data signals on the plurality of data lines and a reference signal;
• second instructions for measuring a delay between the data signal and the reference signal on each of the plurality of data lines, based on a periodic timing reference, to form a plurality of delay measurements;
• third instructions for generating a set of delay values from the plurality of delay measurements;
• and
• fourth instructions for using the set of delay values to adjust delay in a transmission in each of the plurality of data signals in the plurality of data lines.

A computer program product in a computer readable medium for equalizing a transmission of data signals in a plurality of input channels in a device, the computer program product comprising:

• first instructions for receiving a data signal form each of the plurality of input channels in the device and a reference signal;
• second instructions for identifying a delay between a transition in the data signal and a transition in the reference signal on each channel of the plurality of input channels, based on a periodic timing reference to form a plurality of delays;
• and
• third instructions for using the plurality of delays to adjust a delay in a transmission of a data signal on each channel within the set of input channels to increase a setup and a hold time for the plurality of data signals.