Multipass approach for performing channel equalization training

A non-transitory computer-readable medium that, when executed by a processing unit, causes the processing unit to analyzing equalization coefficients for a high-speed data bus, by performing the steps of:

• performing a first pass test over a plurality of sets of equalization coefficients to filter the plurality of sets of equalization coefficients to produce one or more filtered sets of equalization coefficients, wherein each filtered set of equalization coefficients meets a first predetermined threshold, and wherein the plurality of sets of equalization coefficients are distributed over a map of equalization coefficients comprising a plurality of points, wherein each point on the map represents a single set of equalization coefficients;
• performing a second pass test over the one or more filtered sets of equalization coefficients to determine a final set of equalization coefficients that meets a second predetermined threshold, wherein the second pass test produces more accurate results than the first pass test.

A method for analyzing equalization coefficients for a high-speed data bus, the method comprising:

• performing a first pass test over a plurality of sets of equalization coefficients to filter the plurality of sets of equalization coefficients to produce one or more filtered sets of equalization coefficients, wherein each filtered set of equalization coefficients meets a first predetermined threshold, and wherein the plurality of sets of equalization coefficients are distributed over a map of equalization coefficients comprising a plurality of points;
• performing a second pass test over the one or more filtered sets of equalization coefficients to determine a final set of equalization coefficients that meets a second predetermined threshold, wherein the second pass test produces more accurate results than the first pass test.

A non-transitory computer-readable medium that, when executed by a processing unit, causes the processing unit to analyzing equalization coefficients for a high-speed data bus, by performing the steps of:

• performing a first pass test over a plurality of sets of equalization coefficients to filter the plurality of sets of equalization coefficients to produce one or more filtered sets of equalization coefficients, wherein each filtered set of equalization coefficients meets a first predetermined threshold, and wherein the plurality of sets of equalization coefficients are distributed over a map of equalization coefficients comprising a plurality of points;
• performing a second pass test over the one or more filtered sets of equalization coefficients to determine a final set of equalization coefficients that meets a second predetermined threshold, wherein the second pass test produces more accurate results than the first pass test.