原标题：Freescale Kinetis KEA128汽车光控制模块参考设计

　　freescale公司的Kinetis KEA128系列产品是基于ARM Cortex-M0+内核的MCU,工作频率48MHz,单周期32位x32位乘法器,多达128KB闪存,256B EEPROM 和16KB RAM,工作电压2.7V-5.5V,闪存写电压2.7V-5.5V,工作温度–40℃C 到+125℃,主要用在汽车娱乐连接模块,DC/BLDC马达控制,TPMS,电动摩托车CDI/EFI,电池管理,泵/风扇控制,窗/门/天窗控制,BCM/HVAC和座位/雨刷控制等.本文介绍了Kinetis KEA128主要特性和框图,以及汽车光控制模块KEA128LEDLIGHTRD主要特性,框图和电路图.

　　Kinetis EA series MCUs for automotive provide cost-effective ARM®-based solution for a wide range of automotive applications and are pin-compatible across the Kinetis EA series and with future Kinetis automotive families.

　　This series includes a set of analog, communication, timing and control peripherals with varying flash memory size and pin count. These scalable devices are highly robust, and offer an enhanced ESD/EMC performance solution for cost-sensitive automotive applications. This series is supported by development tools, software and hardware references to help you quickly start designing.

　　Kinetis KEA128主要特性:

　　Operating Characteristics

　　• Voltage range: 2.7 to 5.5 V

　　• Flash write voltage range: 2.7 to 5.5 V

　　• Temperature range (ambient): –40℃ to +125℃

　　Performance

　　• Up to 48 MHz ARM Cortex-M0+ core

　　• Single-cycle 32-bit x 32-bit multiplier

　　• Single-cycle I/O access port

　　Memories and Memory Interfaces

　　• Up to 128 KB flash

　　• Up to 256 B EEPROM

　　• Up to 16 KB RAM

　　Clocks

　　• Oscillator (OSC)—loop-controlled Pierce oscillator, crystal or ceramic resonator range of 31.25 kHz to 39.0625 kHz or 4 MHz to 24 MHz

　　• Internal clock source (ICS)—internal FLL with internal or external reference, precision trimming of internal reference allowing 1% deviation across temperature range of –30 ℃ to 85 ℃ and 1.5% deviation across temperature range of –40 ℃ to 125 ℃, up to 48 MHz

　　• Internal 1 kHz low-power oscillator (LPO)

　　System Peripherals

　　• Power management module (PMC) with three power modes: run, wait, stop

　　• Low-voltage detection (LVD) with reset or interrupt, selectable trip points

　　• Watchdog with independent clock source (WDOG)

　　• Programmable cyclic redundancy check module (CRC)

　　• Serial wire debug interface (SWD)

　　• Bit manipulation engine (BME)

　　Security and Integrity Modules

　　• 80-bit unique identification (ID) number per chip

　　Human-machine interface (HMI)

　　• Up to 71 general-purpose input/output (GPIO)

　　• Up to two 32-bit keyboard interrupt modules (KBI)

　　• External interrupt (IRQ)

　　Analog Modules

　　• One 12 bit with up to 16 channel SAR ADC with internal band gap reference channel, operation in stop mode, optional hardware trigger (ADC)

　　• Two analog comparators containing a 6-bit DAC and programmable reference input (ACMP)

　　Timers

　　• One 6-channel FlexTimer/PWM (FTM)

　　• Up to two 2-channel FlexTimer/PWM (FTM)

　　• One 2-channel periodic interrupt timer (PIT)

　　• One real-time clock (RTC)

　　• Up to one 16-bit pulse width timer

　　Kinetis KEA128目标应用:

　　• Infotainment connection module

　　• Park assistance

　　• DC/BLDC motor control

　　• Electronic park brake

　　• TPMS

　　• Motorcycle CDI/EFI

　　• Battery management

　　• Pump/fan controller

　　• Passive entry push start

　　• Ambient lighting

　　• BCM/HVAC

　　• Windows/door/sun roof

　　• Seats/mirror/wiper

　　• Immobilizer

　　• Powertrain companion chip

　　• Generic sensor node

　　图1. Kinetis KEA128系列MCU框图

　　KEA128LEDLIGHTRD光控制模块参考设计

　　KEA128LEDLIGHTRD: Light Control Module Reference Design Based on Kinetis EA MCU and E-switch (MC10XS3425)

　　The lighting control reference design is built on a Kinetis KEA128 32-bit ARM® Cortex®-M0+ automotive-grade MCU. Overall hardware solution includes Kinetis KEA128 MCU, MC10XS3425EK quad high-side driver chips MC33901 CAN transceiver and MC33662 LIN transceiver chips. This covers LIN and CAN communication-based complete headlight environment control solution, including LEDs, tail lights, turn signals, lamp current control and diagnostics.

　　Hardware board is available for purchase to evaluate this solution and it includes a SWD connector interface to debug the SW provided. In addition, a lighting connector interface is available to increase the number of lights controlled through this solution.

　　KEA128LEDLIGHTRD光控制模块参考设计主要特性:

　　32-bit KEA128 MCU in 64 LQFP package

　　MC33662 LIN transceiver

　　MC33901 CAN transceiver

　　MC10XS3425EK multi-chip high-side switch

　　4 LEDs

　　4 Potentiometers

　　4 User buttons

　　SWD connector interface for debugging

　　Light connector interface

　　KEA128LEDLIGHTRD光控制模块参考设计包括:

　　• Kinetis KEA128LEDLIGHTRD board

　　• DVD

　　• Quick Start Guide

　　图2. KEA128LEDLIGHTRD光控制模块参考设计框图