This article mainly discusses the following three main points: a. MC33906 / 7/8 SBC: power supply and safety; b. MPC574xP MCU: performance and safety; c. Comprehensive development support.
Freescale Semiconductor helps automotive designers reduce the complexity of building functional safety systems that comply with the International Organization for Standardization (ISO) 26262 standard and shorten development time.
The Qorivva MPC574xP 32-bit microcontroller (MCU) and system-on-chip (SBC) MC33906 / 7/8 series are Freescale ’s new SafeAssure solutions that help automotive systems meet all requirements including the most stringent ASIL D level Automotive Safety Integrity Level (ASIL). Targeted applications include electric power steering, electronic stability control systems, automotive power and chassis control, safety domain control, adaptive cruise control, and blind spot detection.
The Qorivva MPC574xP MCU and MC33906 / 7/8 SBC series have adopted a method at the basic stage of the design to enable system manufacturers to more easily meet the system functional safety standards, providing:
1. Integrated hardware security architecture
2. The included security software
3. Comprehensive support infrastructure to help shorten development time.
Freescale's SafeAssure program includes a wide range of MCU, sensor and analog IC options, as well as a variety of support, including training for functional safety application design, safety documentation and technical support.
Freescale Vice President and General Manager of Analog and Mixed-Signal Products Business Unit Gavin Woods said, "Our system-level approach helps developers reduce the complexity of meeting safety standards while building advanced safety features in the system. Our new generation of SBC and the latest Qorivva MCU are backed by Freescale ’s SafeAssure program, enabling our customers to meet their system-level functional safety goals. "
Consumer safety awareness and laws and regulations have increased the safety requirements of automobiles, so for automotive OEMs, the complexity of electronic control unit (ECU) level is also increasing. Using the MPC574xP MCU in conjunction with Freescale's SBC devices can help simplify system design and optimize interactions in monitoring, diagnostics, and software architecture. Each device also has its own fail-safe inspection mechanism.
MC33906 / 7/8 SBC: power supply and safety
The SBC device supplies power to the MCU and other system loads, and optimizes energy consumption through a low-power power-saving mode. These devices also include CAN and LIN physical layers, safety measurement and serial peripheral interfaces in accordance with ISO 11898-2-5 and LIN 2.1 / J2602-2 standards, which can control and diagnose MCUs.
The pin-compatible MC33906 / 7/8 series is a new generation of Freescale SBC solutions, including DC / DC switching regulators that optimize energy efficiency. The optional speed-up mode keeps the system available during the engine start pulse. In addition, the ultra-low power mode is designed to greatly reduce current consumption and optimize wake-up time. By absorbing the advantages of previous generations of products, the new SBC is designed to meet the latest electromagnetic compatibility requirements of automotive OEMs.
The MC33906 / 7/8 devices are the first Freescale analog solutions developed specifically to meet ASIL D requirements. This includes a wide range of integrated safety measures, such as key analog parameter monitoring, fail-safe state machines, and advanced watchdogs. When combined with dual-core lockstep MCUs, these measures can simplify system design and reduce software complexity.
These SBCs are part of Freescale's Energy-Efficient SoluTIons program, which means assuring customers that Freescale has adopted the right combination of technology and process to achieve the optimal energy-saving goals related to specific application spaces. This means that within the limited energy and power budget of the embedded environment, Freescale ’s technical expertise can deliver products optimized for high performance.
MPC574xP MCU: performance and safety
Qorivva MPC574xP MCUs provide the performance and features required to meet functional safety requirements, up to ISO 26262 ASIL D level. The Qorivva MCU can run up to 180 MHz and is built on a 55 nm process. It has an integrated security architecture, dual-core delay lockstep and additional on-chip redundancy. It can operate in extreme operating environments, such as in electric power steering systems, which require a bonding temperature of up to 165 degrees Celsius.
MPC574xP integrates many features into a secure platform, which doubles memory, performance and motor control functions compared to previous Freescale products. In addition, pin compatibility means that existing Freescale MCU customers can upgrade with minimal changes to hardware and software, which can speed time to market and shorten the overall development cycle. The device follows Freescale ’s tradition of introducing dual-core lockstep MCUs to the automotive market for more than a decade.
Comprehensive development support
Support provided includes the MPC574xP AUTOSAR safety MCAL and functional safety support documents for these devices, including safety manuals, safety application guides, failure mode analysis, impact, and diagnosis. In addition, Freescale has worked with third-party partners to create a comprehensive functional safety ecosystem, including RTOS, toolchain, training and certification support, all of which help guide customers through the final product certification process.
Freescale plans to provide samples of MPC574xP MCUs and MC33906 / 7/8 SBC devices in the third quarter of 2012.
Freescale ’s SafeAssure Functional Safety Program is designed to help system manufacturers more easily meet system functional safety standards: International Standards Organization (ISO) 26262 and International Electrotechnical Commission (IEC) 61508. The plan emphasizes Freescale solutions (hardware and software) and optimizes these solutions to support functional safety implementation, in addition to providing a rich set of support materials.
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