Freescale公司的KineTIs KEA128系列產(chǎn)品是基于ARM Cortex-M0+內(nèi)核的MCU,工作頻率48MHz,單周期32位x32位乘法器,多達(dá)128KB閃存,256B EEPROM和16KB RAM,工作電壓2.7V-5.5V,閃存寫電壓2.7V-5.5V,工作溫度–40℃C 到+125℃,主要用在汽車娛樂連接模塊,DC/BLDC馬達(dá)控制,TPMS,電動摩托車CDI/EFI,電池管理,泵/風(fēng)扇控制,窗/門/天窗控制,BCM/HVAC和座位/雨刷控制等.本文介紹了KineTIs KEA128主要特性和框圖,以及汽車光控制模塊KEA128LEDLIGHTRD主要特性,框圖和電路圖.

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.

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

• 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

圖1. Kinetis KEA128系列MCU框圖

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.

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光控制模塊參考設(shè)計包括:

• Kinetis KEA128LEDLIGHTRD board
• DVD
• Quick Start Guide

圖2. KEA128LEDLIGHTRD光控制模塊參考設(shè)計框圖

圖3. KEA128LEDLIGHTRD光控制模塊參考設(shè)計電路圖(1)

圖4. KEA128LEDLIGHTRD光控制模塊參考設(shè)計電路圖(2)