方案描述：

　　中央车身控制模块(BCM)是实现车身功能的中枢系统，如内部与外部照明、安全系统与门禁控制、车门及座椅舒适性调整以及其他便利性控制功能。飞思卡尔业内领先的产品组合包括基于Power Architecture的32位，以及基于S12的16位MCU系列，专门满足各种BCM应用需求。在实现系统支持方面，我们提供信号调节、MOSFET前置驱动器、源监视器或LED驱动器取代开关。SBC采用单一封装将电压调节器与CAN或LIN物理接口相结合。H桥驱动器及一系列高边开关(eXtreme 开关)支持大电流负载并取代继电器。网关可用作各种车载通信网络之间的信息接口，包括以太网、FlexRay、CAN、LIN及MOST?协议。同时，还可作为汽车中央诊断接口。网关功能可集成在中央BCM中，也可以作为单独ECU。飞思卡尔基于Power Architecture的32位单核或双核MCU提供必要的计算性能、内存扩展和通信接口。

　　方案设计图：

方案关键器件表：

　　MC33742

　　The 33742 and the 33742S are SPI-controlled System Basis Chips (SBCs) combining many frequently used functions along with a CAN 2.0-compliant transceiver, used in many automotive electronic control units (ECUs). The 33742 SBC has a fully protected fixed 5.0 V low dropout

　　internal regulator with current limiting, overtemperature pre-warning, and reset. A second 5.0 V regulator can be implemented using external pass PNP bipolar junction pass transistor driven by the SBC’s external V2 sense input and V2 output drive pins.

　　The SBC has four main operating modes: Normal, Standby, Stop, and Sleep mode. Additionally there is an internally switched high-side power supply output, four wake-up inputs pins, a programmable window watchdog, interrupt, reset, and a SPI module for communication and control. The high-speed CAN A and B transceiver is available for inter-module communication.

　　Features

　　•1.0 Mbps CAN Transceiver Bus Interface with Bus Diagnostic Capability

　　•SPI Control at Frequencies up to 4.0 Mhz

　　•5.0 V Low Dropout Voltage Regulator with Current Limiting, Overtemperature Pre-Warning, and Output Monitoring and Reset

　　•A Second 5.0 V Regulator Capability using an External Series Pass Transistor

　　•Normal, Standby, Stop, and Sleep Modes of Operation with Low Sleep and Stop Mode Current

　　•A High-Side (HS) Switch Output Driver for Controlling External Circuitry.

　　•Pb-Free Packaging Designated by Suffix Code EG and EP

　　MC33902

　　The MC33902 is a high speed CAN physical interface. The device includes an internal 5.0 V supply for the CAN bus transceiver, and requires only a connection to a battery line.

　　The MC33902 provides 4 operation modes, including low power modes with remote and local wake-up.

　　The device has very low sleep and standby current consumption.

　　Features

　　•High speed CAN interface for baud rates of 40 kb/s to 1.0 Mb/s•Compatible to ISO11898 standard

　　•Single supply from battery. No need for a 5.0 V supply for CAN interface

　　•I/O compatible from 2.75 V to 5.5 V via a dedicated input terminal (3.3 V or 5.0 V logic compatible)

　　•Low Power mode with remote CAN wake-up and local wake-up recognition and reporting

　　•CAN bus failure diagnostics and TXD/RXD pin monitoring, cold start detection, wakeup sources reported through the ERR pin•Enhanced diagnostic for bus, TXD, RXD and supply pins available through Pseudo SPI via existing terminals EN, STBY and ERR.

　　•Split terminal for bus recessive level stabilization•INH output to control external voltage regulator•Pbfree packaging designated by suffix code EF

　　MC33661

　　Local Interconnect Network (LIN) is a serial communication protocol

　　designed to support automotive networks in conjunction with Controller Area Network (CAN). As the lowest level of a hierarchical network, LIN enables costeffective communication with sensors and actuators when all the features of CAN are not required. The 33661 is a Physical Layer component dedicated to automotive LIN subbus applications. It offers slew rate selection for optimized operation at 10kbps and 20kbps, fast baud rate (above 100kbps) for test and

　　programming modes, excellent radiated emission performance, and safe behavior in the event of LIN bus short-to-ground or LIN bus leakage during low-power mode.

　　Features

　　•Operational from VSUP 6.0V to 18V DC, Functional up to 27V DC, and Handles 40V During Load Dump

　　•Active Bus Waveshaping Offering Excellent Radiated Emission Performance

　　•5.0kV ESD on LIN Bus Terminal•30kΩ Internal Pullup Resistor

　　•LIN Bus Short-to-Ground or High Leakage in Sleep Mode

　　•-18V to +40V DC Voltage at LIN Terminal

　　•8.0µA Standby Current in Sleep Mode

　　•Local and Remote Wake-Up Capability Reported by INH and RXD Terminals

　　•5.0V and 3.3V Compatible Digital Inputs Without Any External Components Required

　　33972A

　　The 33972 Multiple Switch Detection Interface with Suppressed Wake-Up is designed to detect the closing and opening of up to 22 switch contacts. The switch status, either open or closed, is transferred to the microprocessor unit (MCU) through a serial peripheral interface (SPI). The device also features a 22-to-1 analog multiplexer for reading inputs as analog. The analog input signal is buffered and provided on the AMUX output pin for the MCU to read.

　　The 33972 device has two modes of operation, Normal and Sleep. Normal mode allows programming of the device and supplies switch contacts with pullup or pulldown current as it monitors switch change of state. The Sleep mode provides low quiescent current, which makes the 33972 ideal for automotive and industrial products requiring low sleep state currents.

　　Features

　　•Designed to Operate 5.5 V ≤ VPWR ≤ 26 V

　　•Switch Input Voltage Range -14 V to VPWR, 40 V Max

　　•Interfaces Directly to MPU using 3.3 V / 5.0 V SPI Protocol

　　•Selectable Wake-Up on Change of State

　　•Selectable Wetting Current (16 mA or 2.0 mA)

　　•8 Programmable Inputs (Switches to Battery or Ground)

　　•14 Switch-to-Ground Inputs

　　•Typical Standby Current - VPWR = 100 µA and VDD = 20 µA

　　•Active Interrupt (INT) on Change-of-Switch State•

　　Pb-Free Packaging Designated by Suffix Code EW

　　MC33879

　　Overview

　　The NXP® MC33879 device is an 8-output hardware configurable, high side/low side switch with 16-bit serial input control using the serial peripheral interface (SPI).

　　Two of the outputs may be controlled directly via a MCU for pulse-width modulation applications

　　Incorporates SMARTMOS® technology with CMOS logic, bipolar/MOS analog circuitry, and DMOS power MOSFETs

　　Controls various inductive, incandescent, or LED loads by directly interfacing with a MCU

　　We recommend the use of the "A" version devices for new designs

　　Features

　　Designed to operate 5.5 V ≤ VPWR ≤ 27.5 V

　　16-bit SPI for control and fault reporting, 3.3 V / 5.0 V compatible

　　Outputs are current limited (0.6 A to 1.2 A) to drive incandescent lamps

　　Output voltage clamp, + 45 V (low side) and - 20 V (high side) during inductive switching

　　On/Off control of open load detect current (LED application)

　　Internal reverse battery protection on VPWR

　　Loss of ground or supply will not energize loads or damage IC

　　Maximum 5.0 µA IPWR standby current at 13 V VPWR

　　RDS(ON) of 0.75 Ohm at 25 °C typical

　　Short-circuit detect and current limit with automatic retry

　　Independent over-temperature protection

　　The MC33879 is included in NXP®.s product longevity program, with assured supply for a minimum of 15 years after launch

　　MC33810

　　The 33810 is an eight channel output driver IC intended for automotive engine control applications. The IC consists of four integrated low side drivers and four low side gate predrivers. The low side drivers are suitable for driving fuel injectors, solenoids, lamps, and relays. The four gate pre-drivers can function either as ignition IGBT gate pre-drivers or as general purpose MOSFET gate pre-drivers.

　　When configured as ignition IGBT gate pre-drivers, additional features are enabled such as spark duration, dwell time, and ignition coil current sense. When configured as a general purpose gate predriver, the 33810 provides external MOSFETs with short circuit protection, inductive flyback protection and diagnostics. The device is packaged in a 32 pin (0.65mm pitch) exposed pad SOIC

　　.Features

　　•Designed to operate over the range of 4.5V ≤ VPWR ≤ 36V

　　•Quad ignition IGBT or MOSFET gate pre-driver with Parallel/SPI and/or PWM control

　　•Quad injector driver with Parallel/SPI control

　　•Interfaces directly to MCU using 3.3V / 5.0V SPI protocol•Injector driver current limit - 4.5A max.

　　•Independent fault protection and diagnostics•VPWR standby current 10µA max.

　　•Pb-free packaging designated by suffix code EK

　　MC33926

　　Overview

　　The dual MC33926 motor driver carrier is a breakout board featuring two Freescale MC33926 H-bridge ICs. It can supply up to almost 3 A continuous current per channel to two brushed DC motors at 5 – 28 V, and it can tolerate peak currents up to 5 A per channel for a few seconds, making this a great general-purpose motor driver for medium-sized DC motors and for differential-drive robots that use such motors. The MC33926 supports ultrasonic (up to 20 kHz) pulse width modulation (PWM) of the motor output voltage, which eliminates the audible switching sounds caused by PWM speed control, and a current feedback circuit for each motor outputs an analog voltage on its respective FB pin that is proportional to the output current. Since this board is a carrier for the Freescale Semiconductor MC33926 H-bridge, we recommend careful reading of the MC33926 datasheet (1MB pdf).

　　For a single-driver version of this board, please consider the MC33926 motor driver carrier.

　　Pinout

　　The default states of many of the MC33926 logic input pins requires that many external connections be made to use this board. To reduce the number of necessary external connections, the board has seven default-overriding jumpers. All of the default-overriding jumpers are tied to VDD, except the D1 jumpers, which are tied to GND. All VDD jumper pads are circles; the ground jumper pads are square. Note that the board has only one invert, slew, and enable pin; each of these three pins affects both motor drivers.

　　飞思卡尔半导体(Freescale Semiconductor)是全球领先的半导体公司，全球总部位于美国德州的奥斯汀市。专注于嵌入式处理解决方案。飞思卡尔面向汽车、网络、工业和消费电子市场，提供的技术包括微处理器、微控制器、传感器、模拟集成电路和连接。飞思卡尔的一些主要应用和终端市场包括汽车安全、混合动力和全电动汽车、下一代无线基础设施、智能能源管理、便携式医疗器件、消费电器以及智能移动器件等。在全世界拥有多家设计、研发、制造和销售机构。Gregg Lowe是总裁兼CEO，该公司在纽约证券交易所股票代码(NYSE)：FSL，在2013年投入了7.55亿美元的研发经费，占全年净销售额的18%。

　　2015年2月，飞思卡尔与 NXP达成合并协议，合并后整体市值 400 亿美金。并购将在2015年下半年彻底完成。交易完成后，飞思卡尔股东将获得 6.25 美元 + 0.3521 NXP 股份 / 每股 的回报，占合并后公司 32% 股权。同时，飞思卡尔市值将达到 118 亿美金，合并后实体整体市值达到含债 167 亿美金。