US 2026/0029818 A1Published application

Signal skew compensation apparatus and method

AssigneeHunan Great-Leo Microelectronics Co., Ltd.

InventorsYunjie LIU, Hu CHEN, Binshan WU, Huanrong YANG

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Abstract

The invention discloses a signal skew compensation apparatus and method. The signal skew compensation apparatus comprises: a clock detection module (1) for detecting a frequency output of an input clock signal; a DELAY module (2) for receiving a data signal and introducing a delay, a delay amount being controlled and delayed data being output based on the frequency detected by the clock detection module (1) and a DELAY value output by a data parsing control module (3); and the data parsing control module (3) for receiving the delayed data and parsing a PING message therein, and adjusting the output DELAY value based on a parsing result. The invention has the advantages of simple implementation, low cost, dynamically adjustable signal skew compensation amount, and high flexibility, real-time performance and efficiency.

Claims19

Dependent claims

A signal skew compensation apparatus, characterized by comprising:

a clock detection module, configured to detect a frequency output of an input clock signal;
a DELAY module, configured to receive a data signal and introduce a delay, wherein a delay amount is controlled and delayed data is output based on the frequency detected by the clock detection module and a DELAY value output by a data parsing control module;
and
the data parsing control module, configured to receive the delayed data and parse a PING message in the delayed data, and adjust the output DELAY value based on a parsing result,
the data parsing control module comprises a parsing circuit unit and a storage unit, and the parsing circuit unit is configured to parse the PING message in the delayed data, continuously adjust the DELAY value, and store a minimum DELAY value allowing successful parsing and a maximum DELAY value at which parsing begins to fail in the storage unit,
wherein the data parsing control module further comprises an optimum sampling point calculation unit configured to calculate the DELAY value corresponding to the optimum sampling point based on the minimum DELAY value and maximum DELAY value stored in the storage unit,
wherein if the data parsing control module fails to parse the PING message after power-up, a current DELAY value is increased based on a preset step size until the minimum DELAY value is obtained upon successful initial parsing, and the DELAY value is continuously increased until a parsing error occurs to obtain the maximum DELAY value,
wherein if the data parsing control module is able to parse the PING message after power-up, a configuration value of the minimum DELAY value is obtained, and the current DELAY value is increased based on the preset step size until the maximum DELAY value is reached upon an initial parsing error.

5 more elements

A signal skew compensation method, characterized by comprising:

detecting a frequency of an input clock signal;
receiving a data signal and introducing a delay, wherein a delay amount is controlled and delayed data is output based on the detected frequency and a DELAY value;
and
receiving the delayed data and parsing a PING message in the delayed data, and adjusting the output DELAY value based on a parsing result,
wherein receiving the delayed data and parsing the PING message therein further comprises capturing the DELAY value corresponding to an optimum sampling point based on the parsing results for each DELAY value, comprising:
acquiring a minimum DELAY value allowing successful parsing and a maximum DELAY value at which parsing begins to fail;
calculating the DELAY value corresponding to the optimum sampling point based on the minimum DELAY value and the maximum DELAY value;
if a data parsing control module fails to parse the PING message after power-up, increasing a current DELAY value based on a preset step size until the minimum DELAY value is obtained upon successful initial parsing, and continuously increasing the DELAY value until a parsing error occurs to obtain the maximum DELAY value;
and if the data parsing control module is able to parse the PING message after power-up, obtaining a configuration value of the minimum DELAY value, and increasing the current DELAY value based on the preset step size until the maximum DELAY value is reached upon an initial parsing error.

6 more elements

Dependencies are inferred from the claim text.