Freescale's KineTIs KEA128 series products are based on ARM Cortex-M0+ core MCU, operating frequency 48MHz, single-cycle 32-bit x 32-bit multiplier, up to 128KB flash memory, 256B EEPROM and 16KB RAM, operating voltage 2.7V-5.5V, flash memory Write voltage 2.7V-5.5V, operating temperature -40°C to +125°C, mainly used in car entertainment connection module, DC/BLDC motor control, TPMS, electric motorcycle CDI/EFI, battery management, pump/fan control, Window / door / sunroof control, BCM / HVAC and seat / wiper control, etc. This article describes the KineTIs KEA128 main features and block diagram, and automotive light control module KEA128LEDLIGHTRD main features, block diagram and circuit diagram.
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°C to +125°C
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 °C to 85 °C and 1.5% deviation across temperature range of –40 °C to 125 °C, 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
Figure 1. Kinetis KEA128 Series MCU Block Diagram
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. 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
The KEA128LEDLIGHTRD light control module reference design includes:
• Kinetis KEA128LEDLIGHTRD board
• DVD
• Quick Start Guide
Figure 2. Reference design block diagram of KEA128LEDLIGHTRD light control module
Figure 3. Circuit diagram for KEA128LEDLIGHTRD light control module reference design (1)
Figure 4. Circuit diagram for reference design of KEA128LEDLIGHTRD light control module (2)
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