Apparatus and method for locally optimizing source synchronous data strobes

An apparatus that compensates for misalignment on a synchronous data bus, the apparatus comprising:

• a microprocessor, comprising:
• a bit lag control element, configured to measure a propagation time beginning with assertion of a strobe and ending with assertion of a first one of a plurality of radially distributed strobes corresponding to said strobe, and configured to generate a value on a lag bus that indicates said propagation time;
• and
• a synchronous lag receiver, coupled to said bit lag control element, configured to receive said first one of said plurality of radially distributed strobes and a data bit, and configured to delay registering of said data bit by said propagation time.

A method that compensates for misalignment on a synchronous data bus, the method comprising:

• first replicating propagation characteristics of a radial distribution network for a strobe, first receiving a first signal, and first generating a second signal by employing replicated propagation characteristics;
• measuring a propagation time beginning with assertion of the first signal and ending with assertion of the second signal;
• second generating a value that indicates the propagation time;
• and
• second receiving a first one of a plurality of radially distributed strobes and a data bit, and delaying registering of the data bit by the propagation time.