Disconnection point detection method for single-wire series circuits, single-wire series circuit, and driver architecture

A disconnection point detection method for single-wire series circuits, used to detect a disconnection point present in a single-wire series circuit;

• wherein the single-wire series circuit comprises a main control unit and N driver units, and the N driver units are connected in series;
• an output terminal of the main control unit is connected to an input terminal of the first driver unit, an output terminal of the N-th driver unit is connected to an input terminal of the main control unit, and a signal terminal of the main control unit is connected to each of the driver units;
• wherein N is a positive integer and N≥1;
• the method is characterized by comprising the following steps:
• assigning addresses to the N driver units connected in series;
• determining whether the main control unit receives expected address-assignment information within a first time period;
• if yes, it is determined that no disconnection point fault exists in the single-wire series circuit;
• if no, it is determined that a disconnection point fault exists in the single-wire series circuit, and a first correction command is output to the N driver units to identify the first driver unit after each short-circuit disconnection point;
• setting the first driver unit at each short-circuit disconnection point to a first state and setting addresses to the address of the first driver unit via the first correction command, and controlling the driver units in the first state to output an address-assignment command;
• wherein the expected address-assignment information is configured to represent sequential address-assignment information from the first driver unit to the N-th driver unit;
• determining whether the main control unit receives second address-assignment information within a second time period;
• if the second address-assignment information is received, determining a position of a final short-circuit disconnection point based on the second address-assignment information;
• wherein the second address-assignment information is configured to represent sequential address-assignment information from the first driver unit to the N-th driver unit at the final short-circuit disconnection point;
• if the second address-assignment information is not received, the single-wire series circuit does not have a short-circuit disconnection point fault, and a second correction command and a third correction command are output to the N driver units to collectively identify the first driver unit after each open-circuit disconnection point;
• setting the first driver unit after each open-circuit disconnection point to a second state and setting addresses to the address of the first driver unit via the third correction command, and controlling the driver units in the second state to output the address-assignment command;
• determining whether the main control unit receives third address-assignment information within a third time period;
• if the third address-assignment information is received, determining a position of a final open-circuit disconnection point based on the third address-assignment information;
• wherein the third address-assignment information is configured to represent sequential address-assignment information from the first driver unit to the N-th driver unit at the final open-circuit disconnection point;
• and
• if the third address-assignment information is not received, a system outputs a warning signal, indicating that multiple faults exist in the system.