• 1星
  • 日期: 2018-05-27
  • 大小: 637.48KB
  • 所需积分:1分
  • 下载次数:1
  • favicon收藏
  • rep举报
  • 分享
  • free评论
标签: FlexRay通信系统



LINCANRFFlexRay Technology InVehicle Networking freescalecomautomotive InVehicle Networking As an industry leader in automotive solutions Freescale Semiconductor has greatly contributed to invehicle networking by founding standards bodies offering an extensive portfolio of products to our customers and driving the development of nextgeneration products In the late 1990s Freescale was the only semiconductor manufacturer to be a founding member of the Local Interconnect Network LIN Cons......

LIN/CAN/RF/FlexRay™ Technology In-Vehicle Networking freescale.com/automotive In-Vehicle Networking As an industry leader in automotive solutions, Freescale Semiconductor has greatly contributed to in-vehicle networking by founding standards bodies, offering an extensive portfolio of products to our customers and driving the development of next-generation products. In the late 1990s, Freescale was the only semiconductor manufacturer to be a founding member of the Local Interconnect Network (LIN) Consortium. In September 2000, Freescale was one of only two semiconductor manufacturers to be founding members of the FlexRay™ Consortium. LIN/ SAE J2602 Low-speed, single-master, multiple-slave serial networking protocol. The LIN master node typically connects the LIN network with higher-level networks. Speed: Applications: Max. 20 Kbps Door Locks, Climate Control, Seat Belts, Sunroof, Lighting, Window Lift, Mirror Control CAN Multi-master asynchronous serial network protocol for high reliability control applications Speed: Max. 1 Mbps Applications: Body Systems, Engine Management, Transmission FlexRay Next-generation, deterministic and fault-tolerant network protocol to enable high-bandwidth, safety-critical applications Speed: Applications: Max. 10 Mbps per channel (dual channel) Drive-by-Wire, Brake-by-Wire, Advanced Safety and Collision Avoidance Systems, Steer-by-Wire, Stability Control, Camera-Based Monitoring Systems RF Radio frequency transmission, on/off keying or frequency shift keying modulation Frequency: Applications: 304 MHz to 915 MHz Remote Keyless Entry, Vehicle Immobilization, Passive Entry, Tire Pressure Monitoring Systems 2 www.freescale.com/automotive In-Vehicle Network Example Mirror WL LIN Lock Lock LIN Door Module WL Braking Suspension t Heater a e S r e w o P t Heater a e S r e w o P Steering f o o R CAN t a e S r e w o P r a e R Heater Heater ™ FlexRay FlexRay Braking Suspension Leveling Lights Flaps 1-10 Fan CAN Power Train Control Braking Controller Suspension Controller Steering Controller Lights Leveling CAN Climate Control Central Body Controller Dashboard Wiper FlexRay CAN FlexRay FlexRay Suspension Braking Door Module LIN Lock WL Suspension Braking The expansion of in-vehicle networking provides many system-level benefits over previous mechanical means, including: • Fewer wires required for each function, which reduces the size of the wiring harness and improves system cost, weight, reliability, serviceability and installation time • Additional functions can be added by making software changes, allowing greater vehicle content flexibility • Common sensor data available on the network so it can be shared, eliminating the need for multiple sensors Lights Wiper Lock Lights Mirror WL Lock Freescale Example of Total Vehicle Networking Solution www.freescale.com/automotive 3 LIN/SAE J2602 LIN is a universal asynchronous receiver-transmitter (UART)-based, single-master, multiple-slave networking architecture originally developed for automotive sensor and actuator networking applications. LIN provides a cost-effective networking option for connecting motors, switches, sensors and lamps in the vehicle. The LIN master node extends the communication benefits of in-vehicle networking all the way to the individual sensors and actuators by connecting LIN with higher-level networks, such as the controller area network (CAN). For a complete description of how LIN works, please visit www.freescale.com/automotive. Key Benefits • Enables effective communication for sensors and actuators where the bandwidth and versatility of CAN is not required • Complements CAN as a cost-effective sub-network • Synchronization mechanism means no quartz oscillator required at slaves • The LIN protocol can be generated by standard asynchronous communication interfaces (SCI, UART)—no specific hardware required • No protocol license fee Typical LIN Applications 1 2 3 4 Steering Wheel: Roof: Engine/Climate: Door/Seat: Cruise Control, Wiper, Turning Light, Climate Control, Radio Rain Sensor, Light Sensor, Light Control, Sun Roof Sensors, Small Motors, Control Panel (Climate) Mirror, Central ECU, Mirror Switch, Window Lift, Door Lock, Seat Position Motors, Occupant Sensors, Seat Control Panel 2 4 1 3 4 www.freescale.com/automotive Freescale’s Complete Portfolio of LIN Products Microcontrollers Freescale microcontrollers support LIN. Optimized LIN solutions include: XGATE coprocessor on S12(X) products, a combination of enhanced direct memory access (eDMA) + enhanced SCI (eSCI) on the MPC5500 family and SLIC on HC08/S08 MCUs. System Base Chip (SBC) Monolithic IC combining many functions found in standard microcontroller based systems, such as power management, communication interface, system protection and diagnostics LIN Enhanced Physical Interface Physical layer component dedicated to automotive LIN sub-bus applications (MC33661) System in a Package (SiP) or Intelligent Distributed Control (IDC) solutions Embedded microcontroller and power management in a single package, providing a highly integrated slave node solution for space-constrained areas, such as seats and door modules (MM908E624) Slave LIN Interface Controller (SLIC) Enables Higher Integration Freescale offers an exceptional embedded SLIC module that automates LIN message handling to help increase performance while reducing development time and cost. It allows you to devote more CPU to the application and gives you the ability to use ROM devices or state machines. SLIC helps increase performance in several ways. True auto-synchronization and auto-bauding find LIN frames and automatically adjust the baud rate without CPU intervention. SLIC reduces interrupt processing up to 83 percent over UART solutions with only two interrupts for any message. This makes it possible to use SYNCH data from messages to trim the oscillator. SLIC also eliminates many steps normally required by UART solutions (trim oscillator, detect break, measure sync signal, adjust baud rate, calculate and verify checksum, handle individual data bytes, detect errors and more). SLIC helps reduce development time by eliminating message processing steps, simplifying and minimizing driver code to as small as 120 bytes (refer to Freescale’s Application Note AN2633). Minimized driver code translates into shortened debug and development time, which enables you to use your engineering time to debug the application rather than LIN communication. SLIC helps reduce cost by using only one software driver to handle any LIN speed on any LIN bus. This allows significant code reuse for many applications, regardless of LIN bus speed. No reprogramming is required to change bus speeds, which equates to fewer part numbers to track and stock. High-speed (up to 120 Kbps) end-of-line programming through LIN allows faster module manufacturing times and field reprogrammability. Also, smaller driver code means less flash is required for LIN communication, resulting in more flash available to use for product applications. SLIC does not require oscillator trimming, unlike UART, which simplifies the design. SLIC emphasizes hardware as an alternative to software message processing and exemplifies Freescale’s technical leadership in LIN communication innovation. Intelligent Distributed Control Solutions The Freescale MM908E6xx family is a highly integrated System in a Package (SiP) solution that includes an HC08 high-performance microcontroller with a SMARTMOS™ analog control IC packaged in a 54-lead small-outline integrated circuit (SOIC). These solutions allow for a very small footprint and simple PCB design. The IDC solutions will replace many discrete ICs, reducing complexity, improving quality and decreasing manufacturing and logistics costs. History Automotive networking has always relied on standardized serial communications hardware, but it was rarely compatible. In the late 1990s, the LIN Consortium was founded by five European automakers, Volcano Automotive Group and Freescale (at the time Motorola) to solve this problem. The first fully implemented version of the new LIN specification was published in November 2002 as LIN version 1.3. In September 2003, version 2.0 was introduced to expand configuration capabilities and make provisions for significant additional diagnostics features and tool interfaces. Some North American automakers were concerned about the rising complexity and lack of direct North American representation in the LIN Consortium. As a result of their concerns, a Society of American Engineers (SAE) task force, which was part of the committee that standardizes vehicle networking, was formed to help ensure LIN 2.0 was suitable for global implementation. Although a full consensus was never reached, the task force published the SAE J2602 Recommended Practice for LIN Networks document, which seeks to fully specify ambiguities and optional features of the LIN 2.0 specification. Since the SAE J2602 recommended practice is still based upon LIN 2.0 and the protocol and physical layer specifications are fundamentally the same, many of the generic MCU-based hardware solutions can work on either type of network. Freescale Semiconductor and LIN—As the only semiconductor manufacturer on the steering committee of the of the LIN Consortium, Freescale Semiconductor has the industry’s most advanced range of devices, components, software, tools and support available. www.freescale.com/automotive 5


       随着智能家居的流行,扫地机器人成为了年轻的都市白领的新宠,已经晋升为家庭必备家电三小件之一。 扫地机器人不仅可以完成琐碎的扫地工作,还可以自动回充,通常使用4节锂电池串联供电。目前市面上扫地机的充电管理大多采用分立方案实现,如图1所示,MCU实时采样电池的充电电压和充电电流,输出PWM经电平转换控制MOS实现闭环控制。由于MCU资源有限,开关频率通常在50K赫兹以下,外围器件多且功率
qwqwqw2088 【模拟与混合信号】
在进行单片机开发时,经常都会出现一些很不起眼的问题,这些问题其实都是很基础的c语言知识点,是一些小细节。但是正是因为很基础,又都是小细节,所以我们往往容易忽视它们。结果有时候我们会花很长的时间纠结一个问题,迟迟找不到问题的所在。当发现原因竟然是这么的简单和不起眼时,大家都会感到痛不欲生。 1. !和 ~ 不一样   ! 是逻辑非符号,~ 是位取反符号。   对IO口某个管脚赋值时
Aguilera 【微控制器 MCU】
传统的大型LED显示屏系统以单片机MCU、ARM 或PLD为核心控制芯片,以FPGA为核心的led显示屏控制系统设计实现起来比较复杂,并且需要以高性能的FPGA芯片作为基础,而以微处理器为核心的LED显示屏控制系统不够灵活,在改变LED屏幕显示尺寸时,需要大幅修改系统设计,PLD虽在处理速度上有较大提高且能很好地控制多模块显示,但其在时序电路描述方面明显不如FPGA。提出了基于FPGA与单片机MC
led2015 FPGA/CPLD
CC2540 蓝牙低能耗 USB 软件狗参考设计
CC2540 USB 软件狗是演示如何使用具备 USB 功能的蓝牙低功耗 (BLE) 无线 MCU 的完整示例。此参考设计可用于在任何含 USB 主机的系统上启用蓝牙智能和物联网应用。   特性 简单的 BLE 至 USB 连接 - 将 BLE 添加到带 USB 的现有产品 包含调试接头、LED 和按钮 - 实现更快速的开发 它还可用作分析 BLE 协议以及软件和系统级调试的数据
fish001 【无线连接】
IL0389 电子纸(墨水屏)驱动
  项目网站 https://github.com/T-Wilko/MicroPython-IL0389-driver   ''' Copyright (c) 2020 Thomas Wilkinson Permission is hereby granted, free of charge, to any person obtaining a c
dcexpert 【MicroPython开源版块】
  下面的这种蜂鸣片很普通吧?相信大家都见过用过。现在的问题就是——它能干什么?   蜂鸣片其实是压电陶瓷片,而压电陶瓷有压电效应: (1)正压电效应 压电晶体在外力作用下发生形变时,正、负电荷中心发生相对位移,在某些相对应的面上产生异号电荷,出现极化强度。这种没有电场作用,由形变产生极化的现象称为正压电效应。 (2)逆压电效应 当给晶体施加一电场时,不仅产生了极化,同
fish001 【微控制器 MCU】






datasheet推荐 换一换

About Us 关于我们 客户服务 联系方式 器件索引 网站地图 最新更新 手机版 版权声明

北京市海淀区知春路23号集成电路设计园量子银座1305 电话:(010)82350740 邮编:100191

电子工程世界版权所有 京ICP证060456号 京ICP备10001474号 电信业务审批[2006]字第258号函 京公海网安备110108001534 Copyright © 2005-2020 EEWORLD.com.cn, Inc. All rights reserved
$(function(){ var appid = $(".select li a").data("channel"); $(".select li a").click(function(){ var appid = $(this).data("channel"); $('.select dt').html($(this).html()); $('#channel').val(appid); }) })