Li & Cai Intellectual Property (USA) Office
Detection circuit and detection method
A detection circuit and a detection method are provided. The detection circuit is suitable for a system-on-chip (SoC). The SoC is coupled to an alarm pin of a DDR4 memory through a connection pad, and the detection circuit includes a control circuit coupled to the connection pad. In response to the DDR4 memory performing a refresh process or a specific event occurring, the control circuit outputs a test signal with a first voltage level to the connection pad, and determines whether a voltage level of the connection pad is tied to a second voltage level. In response to determining that the voltage level of the connection pad is tied to the second voltage level, the control circuit outputs an interrupt signal to a CPU of the SoC, and the interrupt signal indicates that the alarm pin of the DDR4 memory is not controlled normally by the DDR4 memory.
REALTEK SEMICONDUCTOR CORP.
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Chih-Wei Kuo-Wei Shih-Chang Shih-Han Gerchih Fu-Chin Chun-Chi Min-Han
Chang Chi Chen Lin Chou Tsai Yu Tsai