High efficiency, high comfort and high safety are the three goals pursued by modern automotive technology. Electric Power Steering (EPS), an important subsystem of the car, has been working to achieve these goals. EPS has the advantages of compact structure, energy saving, safety and comfort, and can save fuel consumption. Therefore, it is the development direction of automotive power steering system. According to Strategy AnalyTIcs, EPS will account for more than 50% of the global steering system market by 2018. Starting in 2015, China will surpass Europe, America and Japan to become the world's largest EPS market.
EPS consists of three major components, including signal sensing devices (including torque sensors, steering wheel angle sensors and vehicle speed sensors), electronic control units and steering assist mechanisms (motors, clutches, reduction gears, etc.). The electronic control unit (ECU) is the core component of the system and is responsible for processing sensor signals, executing control strategies, outputting control signals to drive motors, system monitoring and diagnostics, and communication.
As a core component in the ECU, the main microcontroller requires high reliability and high performance. Renesas Electronics, which has been a leader in the automotive semiconductor supplier market, recommends the RH850/P1X series based on 40nm technology as the main microcontroller in EPS. The RH850/P1X series from Shiqiang is Renesas' leading EPS 32-bit MCU core for automotive electronics, supporting dual-core interlocking and multi-core architecture, and meeting the highest security level for road vehicles in the ISO 26262 functional safety standard. ASIL D.
The Asia-Pacific region, especially China's automotive electronics market, has continued to grow in recent years, so it has become a matter of course to develop specialized automotive electronics solutions for the Chinese market. According to Hu Yueqiang, the manager of Shiqiang Automotive Electronics, the largest authorized agent of Renesas Electronics, “At present, Renesas Electronics’ MCU has a penetration rate of 43% in the entire automotive field. From the whole system, Renesas RH850/P1X series micro The controller EPS solution meets the needs of China's EPS market from product characteristics, vehicle grade, and price/performance ratio. It can support AutoSar and win the favor of the top five suppliers of EPS in China. It can also be applied to both brushed and brushless motor systems. A lot of customer recognition and recognition.
Specific to the product development technology route, Hu Yueqiang said that the RH850/P1X series of microcontrollers use Renesas' unique metal oxide-silicon oxynitride (MONOS) flash memory process to create trace records in flash memory and quickly read data. , effectively reducing the power consumption of half of Renesas' earlier products. “The RH850/P1X is equipped with a single power supply with a built-in core voltage production regulator, which enables built-in protection in the power supply, enabling a full system ASILD upgrade.†Hu Yueqiang introduced.
Figure: Automotive EPS solution based on Renesas RH850/P1X series MCU
Renesas has been working to reduce the burden on customers in development and design and to provide high quality MCU solutions. The design process of the RH850/P1X fully considers the characteristics of the chassis system requiring high fault detection rate and short control period, and it has an efficient fault detection function. Hu Yueqiang pointed out that the RH850/P1X CPU uses a lock-step dual-core system (lockstep 2) with error checking and correction functions to check and correct data errors affecting memory. And the CPU's fault detection function enables system-level diagnostics for timers, ADCs, serial communications, and more. In addition, the built-in self-test function (BIST) of the CPU detects problems that affect the fault detection function itself. He continues to point out: "The Error Control Module (ECM) allows the user to manage the error signals sent by various modules. When an error signal is received, the ECU takes various measures, such as setting the error pin output, production interrupt or reset signal, to This ensures safety and reliability."
Speaking of the peripheral functions of the chassis system, Hu Yueqiang introduced that the RH850/P1x series is designed to improve the motor control performance of the chassis system, including two sets of TSG3 modules (third generation timer), and the TSG3 module is an enhanced motor control timing. Device. In terms of serial communication, the controller still uses the CAN module architecture, and increases the number of transmission and reception message buffers, improving the ease of use. In addition, the RH850/P1x provides digital interfaces using sensors such as SENT and PSI5.
In addition to the supply of products, Shiqiang also puts a full range of service support for customers in an important position. Hu Yueqiang said that Shiqiang can provide free technical consultation, and customers can get reference solutions and professional technical support from Renesas original factory. The RH850 series has been successfully designed and promoted in Europe and Japan due to its TPV certification. In terms of after-sales service, Shiqiang arranged a professional technical team to help customers deal with the problems in use and solve the worries of customers, so they were recognized by many customers.
With the growing energy issues and the electronicization of automotive products, EPS will become more and more popular. Based on cost-effective and convenient development considerations and increasingly complex system functions, the 32-bit main microcontroller solution will become the mainstream design. Renesas' RH850 based on 40nm process features powerful features, rich built-in and ISO 26262-compliant security. Features that help customers achieve low cost, small size, high performance EPS systems. Welcome to call Shiqiang Service Hotline 40088-73266 to get professional and fast service!
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About Shiqiang
Founded in 1993, Shiqiang Advanced includes Avago, Renesas Electronics, Silicon Labs, Rogers, Melexis, Infineon, Acam, Alliance, Micrel, Littelfuse, NEMICON, EMC & RF Labs, EPSON, Cpyress, Vincotech, SMI, Ricoh Microelectronics, Keysight and other world-renowned semiconductor companies and test and measurement instruments companies are important distributors in Greater China, and are also important suppliers to many electronics manufacturing and R&D companies. In the communications, consumer and automotive electronics sectors, more emerging markets such as the Internet of Things, Internet of Vehicles, Wearables, and Smart Mobile Devices bring more cutting-edge technologies and innovative products.
As a technology-driven distribution company, Shiqiang also has a mature technical support team and system service processes to provide customers with new product introduction, rapid sample, application consulting, solution and software design, development environment, after-sales and logistics. Professional services. In 2014, Shiqiang had annual sales of US$232 million and has 17 branches and offices throughout the country, with nearly 500 employees.
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