The benefits of connecting automotive electronics to a local Bluetooth network are becoming increasingly apparent and quickly become a standard feature favored by customers with intent to purchase. However, the automotive industry has special requirements for reliability and compatibility that exceed normal home and office standards.
1.0 Microcontroller-based systems are becoming more sophisticated, bringing new capabilities to automotive applications and bringing new challenges to these product certification projects.
With the increasing use of RF technologies such as Bluetooth and Wi-Fi, there is a higher demand for addressing regulatory compliance and legal liability issues. These issues include compatibility between new technologies, conflicts between new and old technologies, and the impact on the safety of critical safety systems.
Bluetooth provides customers with highly transparent added value that not only influences purchase decisions, but also enables cost-effectiveness and paving the way for entry into the automotive industry. This challenge brings customer-focused technology to industries that are increasingly demanding reliability, electromagnetic compatibility/sensitivity (EMC/EMS), and high-quality design/manufacturing methods.
The advent of new technologies requires a rigorous exploration of potential product failure modes, which may involve complex interactions between systems. Product design engineers are now aware that from the beginning of the product development cycle to the installation and use phases, it is important to identify potential non-compliance with regulatory issues and risks, and to apply planned design and inspection measures. In automotive applications, the United States Federal Communications Commission (FCC), Bluetooth Certification Organization (BQB), Underwriters Laboratories (UL) and European organizations have developed regulatory requirements that are relevant to microcontroller applications in the automotive industry. The hardware and software features are related. Affecting the choice of a suitable microcontroller can help design engineers avoid excessive development costs and the time-to-market impact of correcting mis-options during product development. Finally, this article provides a certification test summary rather than a single test data for each fuselage in order to avoid redundant tasks in order to meet the repetitive requirements of automotive applications, FCC and BQB.
2.0 Management Regulations in Microcontroller Applications
Before discussing the details of Bluetooth-specific requirements, review the general requirements for microcontrollers in the automotive industry. These requirements include:
· EMC/EMS requirements for automotive and FCC/CE certification
· Electrical safety specified by Underwriters Laboratories (UL)
·Car-specific quality/safety testing
2.1 EMC/EMS requirements
Since the FCC announced that it is not allowed to create more electromagnetic spectrum pollution, there has been an increasing interest in electromagnetic compatibility in electrical systems. Chip and system design engineers have followed automotive/FCC certification guidelines to reduce electromagnetic emissions from electronic systems without compromising performance.
2.2 EMC testing requirements for digital products
The most common electromagnetic compatibility (EMC) testing requirements for electrical products sold in the US and Europe are generally consistent for products that use Bluetooth connectivity and products that do not use Bluetooth connectivity. In addition, microcontroller-based automotive and non-automotive applications adhere to the same requirements. This level of detection varies depending on the type of product.
2.3 EMC testing software
The Society of Automotive Engineers (SAE) has developed a test method that uses a standard test board to measure the electromagnetic radiation of a chip mounted on a board. The combination of EMC test boards and inspection software can also be used to perform FCC inspections.
The benefits of connecting automotive electronics to a local Bluetooth network are becoming increasingly apparent and quickly become a standard feature favored by customers with intent to purchase. However, the automotive industry has special requirements for reliability and compatibility that exceed normal home and office standards.
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