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馬達控制,TPMS,電動摩托車CDI/EFI,電池管理,泵/風扇控制,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.

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目標應用:

? 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

圖1. Kinetis KEA128系列MCU框圖

KEA128LEDLIGHTRD光控制模塊參考設計

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光控制模塊參考設計主要特性:

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光控制模塊參考設計包括:

? Kinetis KEA128LEDLIGHTRD board
? DVD
? Quick Start Guide

圖2. KEA128LEDLIGHTRD光控制模塊參考設計框圖

圖3. KEA128LEDLIGHTRD光控制模塊參考設計電路圖(1)

圖4. KEA128LEDLIGHTRD光控制模塊參考設計電路圖(2)
?