SG2007

Freescale Semiconductor, Inc. Chassis/Safety ELECTROHYDRAULIC BRAKING KEY BENEFITS SG2007/D, REV 0 12/2002 Freescale Semiconductor, Inc... • Reuses hydraulic system technology while incrementally building on the development of advanced electronic systems, such as electronic stability programs (ESP), traction control, and brake assist • Uses software updates to simplify the calibration process by adjusting brake response and pedal feel • Improves connectivity with other emerging systems, such as adaptive cruise control • Removes the large vacuum servo to allow flexible installation • Features an anti-lock braking system (ABS) without feedback from the pedal OVERVIEW Electrohydraulic braking (EHB) systems are designed to allow electronic control of vehicle braking while retaining a reduced hydraulic system. The hydraulic system functions as a reserve in the event of a failure in the electronic control. The EHB control unit receives inputs from sensors connected to the brake pedal. In normal operation, a backup valve is closed and the controller activates the brakes of the wheel through an electric motor driven hydraulic pump. When the controller goes into a fail-safe mode, the backup valve is opened, which allows the brakes to be controlled through a conventional hydraulic circuit. For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. Pedal Sensor Hydraulic Pump Accumulator EHB Control Unit • MCU • Output Driver Hardware Backup Valve Freescale Semiconductor, Inc... Hydraulic Brake Actuators F igure 1. Electrohydraulic Braking Block Diagram MOTOROLA ORDERING INFORMATION Contact your Motorola sales representa tive for complete information about existing products and custom solutions. P art Number MPC500 SMARTMOS Product Highlights 32-bit microcontrollers Integrated circuits Additional Information www.motorola.com/semiconductorsNOTE www.motorola.com/analog NOTE: Search on the listed part number. DESIGN CHALLENGES Electrohydraulic braking i s based on existing ABS systems wi th the addition of several enh ancements. The incl usion of analog e lectrohydraulic valves requires closed-loop, current-controll ed pulse width modulation (PWM) outputs from the electronic contr ol unit ( ECU). An EHB system is required to in corporate a fail-safe stat e in the event of a fault occurring . To correctly initiate the fail-sa fe state, the s ystem relies on its electronic components to provide a high level of operational fault coverage. MOTOROLA SOLUTION An EHB system requires mid- range performance MPC500 m icrocontrollers for syst em control with S MARTMOS companion chips for f unctions such as load driving, sensor interfacing, voltage regulation, and system watchdog operation. Motorola has gained experience deve loping many of the sp ecific aspects required for the im plementation of an EHB system. Becaus e o f its extensive experience in the development of fail-safe microcontrollers, braking-specific modules such as the wheel speed t imer, a nd a software center including drivers, tools, and operating systems, Motorola has proven its ab ility to develop the right sol utions in c ollaboration with its customers. SG2007-2 For More Information On This Product, Go to: www.freescale.com Electrohydraulic Braking Freescale Semiconductor, Inc. DEVELOPMENT TOOLS Vendor MPC555 MPC561 MPC562 MPC563 MPC564 MPC565 MPC566 TPU Metrowerks ● ● ● ● ● ● ● CodeWarrior for Embedded PowerPC ISA ● ● ● ● ● ● ● CodeWarrior for OSEK RTOS ● ● CodeWarrior Development Systems ● ● ● ● OSEKturbo (RTOS) ● TPU Low-Level Driver Library ● ● ● ● ● Flash Programming — CodeWarrior for Embedded PowerPC ISA ● ● ● ● ● Flash Programming — CodeWarrior for OSEK RTOS Wind River Systems ● ● ● ● BDM Debugger — SingleStep ● ● ● ● BDM Debugger — SingleStep with Vision ● ● ● Flash Programming — SingleStep ● ● ● ● BDM Debugger — VisionCLICK ● ● ● Nexus Debugger — VisionCLICK ● ● ● Nexus Debugger — SingleStep with Vision ● ● ● Flash Programming — VisionCLICK ● ● ● ● ● ● ● Compiler — DiabData ● ● ● ● MATRIXX ● ● ● ● ● ● ● Simulator — SingleStep Lauterbach ● ● ● ● ● ● ● ● BDM Debugger Trace32 ● ● ● ● ● ● ● Nexus Debugger Trace32 ● ● ● ● ● ● ● Code Trace (with Bus access) ● ● ● ● ● ● ● Code Trace (Nexus) Axiom Manufacturing ● ● Low-Cost Evaluation Board ● ● Mid-Range Evaluation Board ● ● ● ● ● ● ● Full-Feature Evaluation Board Ashling Microsystems ● ● ● ● ● ● BDM Debugger — Opella, Genia, and Vitra ● ● ● ● ● Nexus Debugger — Vitra (w/trace) ● ● ● Nexus Debugger — Opella, Genia Green Hills Software ● ● ● ● IDE, Debugger — Multi ● ● ● ● Compiler — C/C++/EC++ P&E Microcomputer Systems ● ● ● ● Low-Cost Debugger ● ● ● Flash Programming Tools GNU ● ● ● ● Compiler/Debugger ASH WARE ● TPU Simulator Freescale Semiconductor, Inc... Electrohydraulic Braking For More Information On This Product, Go to: www.freescale.com SG2007-3 Freescale Semiconductor, Inc. DEVELOPMENT TOOLS (continued) Vendor ETAS ErCOSEK Calibration Tools (ETK) Calibration Tools (ETK) Nexus dSPACE TargetLink dli Logic Analyzer Agilent Technologies Logic Analyzer Inverse Assembler, S ource Correlation Emulation Probe (BDV) Tektronix Logic Analyzer Abatron AG BDM Support Accelerated Technology Nucleus (RTOS) MPC555 MPC561 MPC562 MPC563 MPC564 MPC565 MPC566 TPU ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● Freescale Semiconductor, Inc... ● ● ● ● ● ● ● ● ● ● ● ● THIRD PARTY SUPPORT Vendor Metrowerks Axiom Manufacturing Wind River Systems Green Hills Software Lauterbach Accelerated Technology Ashling Microsystems ASH WARE GNU ETAS dSPACE P&E Microcomputer Systems Contact Information 800-377-5416 (www.metrowerks.com) 972-926-9303 (www.axman.com) 800-872-4977 (www.windriver.com) 805-965-6044 (www.ghs.com) 508-303-6812 (www.lauterbach.com) 800-468-6853 (www.acceleratedtechnology.com) 408-732 -6490 (www.ashling.com) 503-533-0271 (www.ashware.com) 617-542-5942 (www.gnu.org) 888-382-7462(www.etasinc.com) 248-567-1300 (www.dspace.com) 617-353-9206 (www.pemicro.com) Electrohydraulic Braking For More Information On This Product, Go to: www.freescale.com SG2007-4 Freescale Semiconductor, Inc. RELATED INFORMATION For inquiries about Motorola products, contact the Technical In formation Center at 8 00-521-6247, or visit us online at w ww.motorola.com/semiconductors. Online Topics MPC500 Analog and Mixed Signal 32-Bit Development Tools Related Product Product Number MPXV6115V NOTE: Search on the product number listed. Product Name High temperature accuracy integrated silicon p ressure sensor — small outline package Contact Information www.motorola.com/semiconductors NOTE Freescale Semiconductor, Inc... Electrohydraulic Braking For More Information On This Product, Go to: www.freescale.com SG2007-5 Freescale Semiconductor, Inc. HOW TO REACH US: USA/EUROPE/LOCATIONS NOT LISTED: Motorola Literature Distribution P.O. Box 5405 Denver, Colorado 80217 1-303-675-2140 1-800-441-2447 JAPAN: Motorola Japan Ltd. SPS, Technical Information Center 3-20-1, Minami-Azabu Minato-ku Tokyo 106-8573, Japan 81-3-3440-3569 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd. Silicon Harbour Centre 2 Dai King Street Tai Po Industrial Estate Tai Po, N.T. Hong Kong 852-26668334 TECHNICAL INFORMATION CENTER: 1-800-521-6274 HOME PAGE: http://www.motorola.com/semiconductors Freescale Semiconductor, Inc... Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”, must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and the Stylized M Logo are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or service names are the property of their respective owners. © Motorola, Inc. 2002 SG2007/D, REV 0 For More Information On This Product, Go to: www.freescale.com December2002