DQS Position Adjustment Method , Controller and Network Device

A controller comprising:

• a control circuit;
• a drive circuit coupled to the control circuit and configured to implement data transmission between the controller and a memory of a device;
• wherein the control circuit being configured to execute instructions in a storage medium to:
• write preset data to the memory;
• read all data signals of the preset data form the memory;
• sample the data signals correctly to obtain a plurality of margin effective widths of the data signals;
• determine a left boundary and a right boundary based on the margin effective widths, wherein the left boundary is a largest value in a plurality of minimum values of the margin effective widths, and wherein the right boundary is a smallest value in a plurality of maximum values of the margin effective widths when all the data signals are aligned with the left boundary;
• calculate a central position based on the left boundary and the right boundary;
• and
• adjust a delay line (DL) of the DQS to the central position.

A network device comprising:

• a controller;
• and
• a storage medium coupled to the controller and configured to store instructions that, when executed by the controller, cause the network device to be configured to:
• write preset data to a memory of a device;
• read all data signals of the preset data form the memory;
• sample the data signals correctly to obtain a plurality of margin effective widths of the data signals;
• determine a left boundary and a right boundary based on the margin effective widths, wherein the left boundary is a largest value in a plurality of minimum values of the margin effective widths, and wherein the right boundary is a smallest value in a plurality of maximum values of the margin effective widths when all the data signals are aligned with the left boundary;
• calculate a central position based on the left boundary and the right boundary;
• and
• adjust a delay line (DL) of the DQS to the central position.