Address allocation

By performing UID arbitration and electrical parameter determination methods in electronic devices, the address is allocated to electronic devices, the problem of address interference is solved, system security is improved and process is simplified.

CN120201006APending Publication Date: 2025-06-24INFINEON TECHNOLOGIES AG
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Patent Information

Application Number
CN202411879734.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-12-21
Filing Date
2024-12-19
Publication Date
2025-06-24

AI Technical Summary

Technical Problem

When assigning addresses to electronic devices, the prior art is difficult to avoid address interference, especially in the same type of electronic devices, which may lead to increased sensitivity to errors and reduced security of system operation.

Method used

By sending a common command to all electronic devices from the controller of the circuit device, step by step arbitration to determine a unique identifier (UID) and determining the properties of the active device based on electrical parameters, thereby assigning the address from the predetermined set of addresses.

Benefits of technology

This method effectively avoids address interference, improves system operation security, reduces dependence on predefined address ranges, and reduces the number of pins of the controller, simplifies the process and reduces the cost.

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Abstract

The invention relates to address allocation. A method for assigning an address to an electronic device (112) is proposed. The method comprises: sending a generic command from a controller (114) of the circuit arrangement (110) to all electronic devices (112) of the circuit arrangement (110), wherein the generic command prompts each electronic device (112) to begin sending a respective unique identifier (UID) of the respective electronic device (112); sending the respective UIDs bit by bit from the electronic device (112) in parallel; performing bitwise arbitration between the electronic devices (112) based on the UID until only one electronic device (112) remains active; sending the electrical parameter from the active electronic device (112) to the controller (114); determining an attribute of the active electronic device (112) from the electrical parameter; and assigning an address to the active electronic device from a predetermined address set. An electronic device (112), a circuit arrangement (110) and cases of the method, the electronic device (112) and the circuit arrangement (110) in automotive applications are also presented.
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