Electronic fuse device and operation method thereof

An eFuse device comprising:

• an eFuse;
• a readout circuit coupled to the eFuse, wherein the readout circuit reads out target data recorded by the eFuse based on a trigger of a clock signal;
• a first register coupled to the readout circuit, wherein the readout circuit stores the target data from the eFuse in the first register;
• and
• a safety control device coupled to the readout circuit to receive and store the target data from the eFuse, and coupled to the first register to receive the target data stored in the first register,
• wherein the safety control device comprises:
• a safety control circuit coupled to the readout circuit to receive and store the target data from the eFuse, and coupled to the first register to receive the target data stored in the first register, wherein
• the safety control circuit compares the target data provided by the readout circuit with the target data provided by the first register to obtain a comparison result, and determines whether a soft error occurs in the target data stored in the first register based on the comparison result;
• and
• in response to the soft error occurring in the target data stored in the first register, the readout circuit reads out the target data recorded by the eFuse again based on the clock signal, and the readout circuit again stores the target data from the eFuse in the first register and the safety control circuit respectively,
• wherein the safety control device further comprises:
• a clock detection circuit coupled to the safety control circuit, wherein the clock detection circuit checks the clock signal configured to trigger the readout circuit, the clock detection circuit provides a check result of the clock signal to the safety control circuit, and the safety control circuit determines whether the target data read by the readout circuit from the eFuse is correct,
• in response to the target data read by the readout circuit from the eFuse being determined to be correct, and in response to the soft error occurring in the target data stored in the first register, the safety control circuit sends a notification to a system circuit;
• and
• in response to the target data read by the readout circuit from the eFuse being determined to be incorrect, the safety control circuit sends a first warning to the system circuit.

An operation method of an eFuse device, comprising:

• reading out target data recorded by an eFuse of the eFuse device based on a trigger of a clock signal by a readout circuit of the eFuse device;
• storing the target data from the eFuse respectively in a first register of the eFuse device and a safety control device of the eFuse device by the readout circuit;
• comparing the target data provided by the readout circuit with the target data provided by the first register by the safety control device to obtain a comparison result, and determining whether a soft error occurs in the target data stored in the first register based on the comparison result;
• in response to the soft error occurring in the target data stored in the first register, reading out the target data recorded by the eFuse again based on the clock signal by the readout circuit, and again storing the target data from the eFuse in the first register and the safety control device respectively by the readout circuit,
• checking the clock signal configured to trigger the readout circuit to determine whether the target data read by the readout circuit from the eFuse is correct;
• in response to the target data read by the readout circuit from the eFuse being determined to be correct, and in response to the soft error occurring in the target data stored in the first register, sending a notification to a system circuit by the safety control device;
• and
• in response to the target data read by the readout circuit from the eFuse being determined to be incorrect, sending a warning to the system circuit by the safety control device,
• wherein checking the clock signal configured to trigger the readout circuit comprises:
• checking whether the clock signal configured to trigger the readout circuit is toggled;
• or
• checking whether a frequency or a period of the clock signal configured to trigger the readout circuit is correct.