Freescale element14: STAR-XL-S08 XL Star Accelerometer demo board

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Kit Overview

element14 and Freescale have joined forces to bring you XL_STARXL_STAR: a complete, flexible, low cost development environment.  On a single board XL_STAR combines a Freescale 8-bit HCS08 MM128MM128 MCU, a Freescale MMA8451QMMA8451Q three-axis Accelerometer, a Freescale MC34673MC34673 battery charger, and a Freescale Open Source BDM Interface.  Demonstrate and evaluate any, or all, of these devices, with the pre-loaded demo program that illustrates orientation, shake, tap, freefall, and transient mode applications, at three user-selectable sensitivities, and two accuracies (8-bit and 14-bit data).  The XL_STAR even automatically goes into sleep or wake mode based on movement of the board.

XL_STARXL_STAR also includes Freescale’s powerful CodeWarrior IDE Special Edition, providing full programming, trace, and debug capability for 64K of object code at no additional cost. If required, the platform is easily extensible to Freescale’s 32-bit Flexis platform.  XL_STAR also simplifies interfacing hardware prototypes to all MCU signals on XL_STAR, using two Single In-Line (SIL) connectors.

XL_Star Sample Application Program

XL_STARXL_STAR includes a sample application pre-programmed into the on-chip Flash of the MM128MM128 MCU. The program is designed to show some of the things that can be done with the on-board MMA8451QMMA8451Q accelerometer.

  • Orientation: Try tipping the board and watch the orange LEDs indicate the direction and magnitude of tip.
  • Shake: Try flicking the board in a direction, either up or down, left or right, or forward or back.  You need to use a sharp flick, like striking a ball in a game of table tennis.  The orange LEDs will point in the direction of the initial flick, resetting after a couple of seconds.
  • Tap: Hold the board loosely and tap it once with your finger; the LEDs will show a 'pulse' pattern. Tap twice in quick succession (double tap) to get a different animated pattern.
  • Freefall: Drop the board from the height of a few centimetres or more. The freefall event will be detected and displayed on the LEDs for a couple of seconds.
  • Transient: The orange LEDs will all illuminate if the board is moving (strictly, if it is accelerating or decelerating) and turns off after a short while if the board is stationary.


Key Applications: Medical devices, Test and Measurement, Instrumentation, Industrial Control.

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Development Tools


Software Development Tools:


Tool TypeSupplierMPNSupported FamilyDescription
IDEFreescaleCodeWarriorAll Freescale MCU's

Freescale's software and development solutions take you beyond the silicon, helping to bring your embedded applications to life.  Learn More


Hardware Development Tools:


Tool TypeSupplierMPNSupported FamilyDescription
Debuggers, Emulators & JTAG ToolsFreescaleU-MULTILINKU-MULTILINKHC08 / HCS08 / HCS12 / ColdFire / Qorivva MPC55xx/56xx / KinetisP&E USB Multilink Universal debug and programming interface for HCS08, HC(S)12(X), ColdFire, Qorivva MPC55xx/56xx, and Kinetis
Debuggers, Emulators & JTAG ToolsFreescaleUSBMULTILINKBDMEUSBMULTILINKBDMEHCS08 / RS08 / HCS12USB BDM Interface cable for the 68HC(S)12(X) and 68HCS08 and 68RS08 and ColdFire V1
Debuggers, Emulators & JTAG ToolsFreescaleUSBMULTILINK08EUSBMULTILINK08EHC08In-circuit emulation, debugging and programming for 68HC08 Flash MCUs
Debugger / ProgrammerFreescaleM68CYCLONEPROEM68CYCLONEPROEHC08 / HS08 / RS08 / HCS12Hardware Debug Interface and Stand-Alone Programmer for HC08, HCS08, RS08, ColdFire V1, and HC(S)12(X)

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Technical Documents

Learning Center
ReadmeXL Star README
User ManualXL Star User Manual
Product BriefXL Star Product Brief
User GuideXL Star User Guide
VideoDemonstration of XL_Star sample programs
VideoDemo of how to install software & drivers for XL_Star Board
PodcastXL Star Training Podcast


Design Elements
SchematicsXL Star Schematics


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Kit Features



  • XL_STARXL_STAR utilizes a Freescale 8-bit S08MM Flexis™ microcontroller: MC9S08MM128VLKMC9S08MM128VLK, allowing designers to create more fully featured products at a lower cost.
    • Precision Analog front end: 16-bit SAR ADC - High resolution ADC
    • Ultra-Low Power operation
    • USB connectivity
    • High speed: HCS08 core delivering a 48 MHz core speed and 24 MHz bus speed
    • Up to 78 GPIO
    • Up to 128 KB flash and 12 KB SRAM
    • Easily extensible to Freescale’s 32-bit Flexis™ platform for more demanding applications
    • Simple programming interface via Open Source BDM
  • Accelerometer
    • XL_STAR includes a Freescale MMA8451QMMA8451Q XtrinsicTM Accelerometer.  The MMA8451QMMA8451Q is a smart, low-power, three-axis, capacitive micro-machined accelerometer, with 14 bits of resolution.   Key features include:
    • ±2g/±4g/±8g dynamically selectable full-scale
    • 3 embedded channels of motion detection
      • Freefall or Motion Detection: 1 channel
      • Pulse Detection: 1 channel
      • Jolt Detection: 1 channel
    • Orientation (Portrait/Landscape) detection with programmable hysteresis
    • Current Consumption: 6 μA – 165 μA
    • Two interrupt pins support extensive user-programmable functions.  Overall power savings are achieved by relieving the host processor from continuously polling data.
  • Battery Charger
    • XL_STAR includes a Freescale MC34673MC34673 Battery Charger  for Single-Cell Li-Ion and Li-Polymer Batteries.  Key features include:
    • The Charger tolerates high input voltages up to up to 28V, eliminating the input over-voltage-protection circuit required in handheld devices.
    • Charge cycle includes trickle, constant-current (CC) and constant-voltage (CV) charge modes.
    • The MC34673MC34673 Battery Charger Is well-suited for use in any Li-ion or Li-polymer battery powered, handheld, portable application, including Bluetooth® headsets, cell phones, GPS, MP3 players, PDAs, and portable media players.
  • CodeWarrior IDE and Open Source BDM
    • XL_STAR comes with Freescale CodeWarrior Special Edition Integrated Development Environment (IDE).  Used in conjunction with the on-board Open Source BDM Interface, XL_STAR is supported by a fully functional programming, trace, and debug environment up to 64K of object code at no additional charge.
    • Open Source BDM, with its hardware and software components, provides a transparent connection between a computer running CodeWarrior and the Freescale MM128MM128 microcontroller on the XL_STAR.
    • Because the Open Source BDM is open source, the source code can be used and/or modified from its original design free of charge.


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Kit Contents


The Freescale's STAR-XL-S08STAR-XL-S08 supplied with below contents:


  • XL_STARXL_STAR Development Board
  • Freescale CodeWarrior Special Edition IDE
  • USB cable
  • Battery





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