Freescale MCUs help streamline body electronics networks; reduce vehicle weight and board sizes
March 18, 2013 by John Day
Qorivva and S12 MagniV devices integrate connectivity, functional safety, security and network management capability, trimming number of required ECUs and associated copper wiring
At Electronica China Freescale Semiconductor expanded its Qorivva and S12 MagniV vehicle body network microcontroller (MCU) portfolios with devices that address automotive industry requirements for higher bandwidth networks, improved data security, functional safety implementation and reduced energy consumption.
Freescale said its new Qorivva MPC5748G and S12 MagniV S12ZVL/S12ZVC MCUs bring a new level of integration and function to automotive body applications. The company notes that connectivity needs grow along with the number of electronic control units (ECUs) in a car and it estimates that the average vehicle includes several miles of copper wire weighing 150 pounds or more.
Freescale’s Qorivva MPC5748G acts as a networking gatekeeper, providing centralized data security, intelligent power management, and ASIL support for functional safety. The new MagniV S12ZVL/S12ZVC MCUs are satellite nodes with integrated power supplies and communications transceivers embedded onto smart mixed-signal MCUs.
Integrating more functionality within the vehicle’s main ECUs and increasing the intelligence of its satellite nodes ( modules in doors, electric motors, etc.) can help reduce the number of ECUs and the amount of associated wiring required, eliminating weight in the vehicle wiring harness and helping to improve fuel economy.
Ray Cornyn, Freescale vice president of Automotive Microcontroller Products, estimated that the new MCUs will enable OEMs to reduce up to 20 pounds of copper wiring and board components, and to reduce board sizes up to 30 percent. Other benefits include simplified vehicle network design and increased manufacturing efficiency.
“By bringing increased intelligence to the central communications controller in the vehicle, Freescale understands the importance of not only securing in-vehicle networks, but also reducing electrical and mechanical energy consumption,” Cornyn said.
The single-chip Qorivva MPC5748G, for next-generation central body control and gateway applications, combines what is, according to Freescale, an unprecedented level of integration, with innovative low-power management modes, support for functional safety, and robust security features.
The new MCU provides support for Ethernet with Audio Video Bridging (AVB), FlexRay™, Media Local Bus (MLB), USB, CAN FD (Flexible Data Rate) and up to 18 LIN controllers. High performance through a multicore architecture and memory options up to 6 MB of flash and 768 KB of RAM help ensure efficient transfer of data and eliminate communication bottlenecks.
A low-power unit (LPU) mode cuts peak current consumption for cyclic wakeup use cases by nearly 30 percent compared to previous generation devices. Analog comparators that operate out of STANDBY mode and “pretended networking” also help support next-generation power budget requirements.
The MPC5748G is a Freescale SafeAssure functional safety solution, defined and developed from the ground up to address the ISO 26262 standard. Built-in safety functions such as self-testing and end-to-end error correction coding (ECC), comprehensive auto safety software including AUTOSAR OS and MCAL drivers and extensive safety documentation help target the use of the device for ASIL B.
The MPC5748G also offers a hardware security module (HSM) for data protection and ensures secure communication and flash updates through AES cryptographic algorithms, secure memory and secure boot capabilities.
Freescale said its new S12ZVL/S12ZVC devices allow designers to achieve the smallest possible CAN termination nodes (using S12ZVC) or LIN nodes (using S12ZVL) and help reduce printed circuit board sizes by as much as 30 percent.
Car systems can connect high-voltage signals and power supplies directly to the S12 MagniV MCU, saving additional discrete components, increasing system quality and reducing system design and manufacturing complexity.
The S12 MagniV portfolio enables body electronics platform design scalability across multiple applications, with CAN and LIN connectivity options, flash memory from 8 KB to 192 KB and a range of package options between 32 and 64 pins.
The S12 MagniV S12ZVL/S12ZVC MCUs are the first devices from the Freescale 16-bit automotive MCU portfolio included in Freescale’s SafeAssure functional safety program. They have been defined and developed from the ground up to address the ISO 26262 standard.
Limited samples of the Qorivva MPC5748G and the S12 MagniV S12ZVL will be available in Q2 of this year and general market availability through distribution in the 2H of 2014. Limited samples of the S12 MagniV S12ZVC will be available in Q3 of this year and general market availability through distribution at the end of 2014.