Receiver device and eye pattern-based control parameter adjustment method

A receiver device, comprising:

• a receiving circuit, processing an input signal according to a current control parameter to generate recovered data;
• and
• a control circuit, coupled to the receiving circuit to provide the current control parameter, wherein the control circuit performs an iterative operation to determine an optimized control parameter, updates the current control parameter of the receiving circuit to the optimized control parameter after completing the iterative operation, and performs hint optimization;
• wherein the hint optimization comprises:
• calling a table sweep state machine to perform the iterative operation on a hint table to determine an optimized hint index after sweeping a plurality of hint indexes in a hint index field of the hint table;
• wherein the iterative operation comprises:
• updating the current control parameter of the receiving circuit to a candidate control parameter;
• checking a relationship between a size of an optimized eye mask and a size of a current eye pattern corresponding to the recovered data;
• maintaining the optimized eye mask and the optimized control parameter corresponding to the optimized eye mask when the optimized eye mask conflicts with the current eye pattern;
• generating a new eye mask larger than the optimized eye mask according to the current eye pattern, updating the optimized eye mask to the new eye mask, and updating the optimized control parameter to the candidate control parameter corresponding to the new eye mask when the optimized eye mask does not conflict with the current eye pattern;
• selecting a selected hint index from the hint indexes in the hint index field according to a starting hint index, an ending hint index and a hint index step;
• extracting a plurality of parameter indexes corresponding to the selected hint index from a plurality of parameter index fields of the hint table, wherein the parameter indexes indicate a plurality of control parameters in a plurality of control parameter tables;
• and
• using the control parameters in the control parameter tables indicated by the parameter indexes as the candidate control parameter.