Receivers and methods of enabling the calibration of circuits receiving input data

A data interface enabling the calibration of circuits receiving input data, the data interface comprising:

• a first data receiver having a first plurality of input data lines coupled to receive a corresponding first nibble of data associated with a data bus and to receive a reference clock signal, the first data receiver comprising a routing circuit for generating an inter-nibble clock signal;
• and
• a second data receiver having a second plurality of input data lines coupled to receive a corresponding second nibble of data associated with the data bus and to receive the inter-nibble clock signal from the first data receiver;
• wherein the first plurality of input data lines are calibrated using the reference clock signal, and the second plurality of input data lines are calibrated using the inter-nibble clock signal.

A method of enabling the calibration of circuits receiving input data, the method comprising:

• receiving a first plurality of data bits associated with a data bus at a first plurality of input data lines of a first data receiver;
• receiving a second plurality of data bits associated with the data bus at a second plurality of input data lines of a second data receiver;
• calibrating the first plurality of input data lines of the first data receiver in parallel with the second plurality of input data lines of the second data receiver;
• receiving a local reference clock signal at the first data receiver;
• and
• wherein the first plurality of input data lines is calibrated using the local reference clock signal.