Over-temperature warning and over-temperature protection method and device based on microcontroller

Abstract

The invention provides an over-temperature warning and over-temperature protection device based on a microcontroller, comprising a microcontroller kernel, an over-temperature detection system, and an external interruption system. The over-temperature detection system includes an over-temperature warning module and an over-temperature protection module, and is used for detecting the temperature of the microcontroller kernel, judging whether the temperature reaches an over-temperature warning threshold or an over-temperature protection threshold and correspondingly issuing an over-temperature protection mark and / or an over-temperature warning mark. The external interruption system is used for generating an interruption entry in the system in response to the over-temperature protection mark and / or the over-temperature warning mark, and can close peripherals through the interruption entry. The invention provides an over-temperature protection device and an over-temperature protection method meeting the demand of automobile electronic reliability. The situation in which the system fails due to local over-heating caused by poor heat dissipation when a chip works for a long time or at high temperature is avoided. The system is forced to be interrupted, and the working mode of the system is configured, so as to avoid impact on the safety.

Description

technical field [0001] The invention relates to the application field of digital circuits, in particular to a design method and hardware implementation of an over-temperature detection and protection circuit in reliability design. Background technique [0002] At present, the number of electronic products used in automobiles is gradually increasing. Automotive electronic chips often work in high temperature, low temperature, dust, oil, vibration and various electromagnetic interference working environments, and their performance is directly related to vehicle performance and personal safety. , which puts strict requirements and standards on the reliability of automotive electronic chips. The automotive electronics industry standard AEC-Q-100 grade 1 requires a temperature range of -40-125°C, which not only requires a specific process design library file as the basis, but also uses some methods suitable for extreme temperatures in the design of the system and circuit. Design...

AI Technical Summary

Problems solved by technology

Solve the system failure caused by local overheating due to poor heat dissipation caused by the chip working for a long time or in a high temperature environment, forcing the system to interrupt processing, configuring the system working mode, and avoiding the impact on safety

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