68HC908RK2 : Microcontroller

 

  • Available for Automotive Only


    • The MC68HC908RK2 MCU is a member of the low-cost, high-performance M68HC08 Family of 8-bit microcontroller units (MCUs). Optimized for low-power operation and available in a small 20-pin SSOP/SOIC package, this MCU is well suited for remote keyless entry (RKE) transmitter designs. The M68HC08 Family is based on the customer-specified integrated circuit (CSIC) design strategy. All MCUs in the family use the enhanced M68HC08 central processor unit (CPU08) and are available with a variety of modules, memory sizes and types, and package types.
    Page Contents
    Other Info
    68HC908RK2 Features

    • High-performance M68HC08 architecture
    • Fully upward-compatible object code with M6805, M146805, and M68HC05 Families
    • Maximum internal bus frequency of 4 MHz at 3.3 volts
    • Maximum internal bus frequency of 2 MHz at 1.8 volts
    • Internal oscillator requiring no external components:
      • Software selectable bus frequencies
      • ±25 percent accuracy with trim capability to ±2 percent
      • Option to allow use of external clock source or external crystal/ceramic resonator
    • 2 Kbytes of on-chip FLASH memory
    • FLASH program memory security 1
    • 128 bytes of on-chip RAM
    • 16-bit, 2-channel timer interface module (TIM)
    • 14 general-purpose input/output (I/O) ports:
      • Six shared with keyboard wakeup function
      • Three shared with the timer module
      • Port A pins have 3-mA sink capabilities
      • Low-voltage inhibit module:
      • 1.85-V detection forces MCU into reset
      • 2.0-V detection sets indicator flag
    • 6-bit keyboard interrupt with wakeup feature
    • External asynchronous interrupt pin with internal pullup (IRQ1)
    • System protection features:
      • Computer operating properly (COP) reset
      • Low-voltage detection with reset
      • Illegal opcode detection with reset
      • Illegal address detection with reset
    • 20-pin plastic SSOP/SOIC package
    • Low-power design with stop and wait modes
    • Master reset pin and power-on reset (POR)
    • Enhanced HC05 programming model
    • Extensive loop control functions
    • 16 addressing modes (eight more than the HC05)
    • 16-bit index register and stack pointer
    • Memory-to-memory data transfers
    • Fast 8 × 8 multiply instruction
    • Fast 16/8 divide instruction
    • Binary-coded decimal (BCD) instructions
    • Optimization for controller applications
    • Third party C language support

       

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    68HC908RK2 Parametrics

    ROM
    KBytes
    RAM
    Bytes
    Flash
    KBytes
    EEPROM
    Bytes
    Timer
    I/O
    Serial
    A/D
    PWM
    Operating Voltage
    V
    Bus Frequency
    (Max)
    MHz
    -
    128
    2
    -
    2-CH, 16-Bit
    14
    -
    -
    See Timer
    1.8 to 3.6
    4.0

     

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    68HC908RK2 Documentation

    Application Note
    ID Name Format Size K Rev # Date Last Modified
    AN1762 Automatic Contrast Control of LCD Displays Using the MC68HC708LN56 Microcontroller pdf 103 0 1/01/1998
    AN1711 DMA08 Systems Compatibilities pdf 305 0 1/01/1997
    AN1770 In-Circuit Programming of FLASH Memory in the MC68HC908GP20 pdf 403 1 1/01/1999
    AN2154 Low-Cost, 3-Phase, AC Motor Control System with Power Factor Correction Based on MC68HC908MR32 pdf 170 0 7/23/2001
    AN1828 FLASH Programming Via CAN pdf 74 0 1/01/1999
    AN2105 Power-On, Clock Selection, and Noise Reduction Techniques for the Motorola MC68HC908GP32 pdf 220 0 1/01/2000
    AN2093 Creating Efficient C Code for the MC68HC08 pdf 35 0 1/01/2000
    AN1858 Sensorless Brushless dc Motor Using the MC68HC908MR32 Embedded Motion Control Development System pdf 194 0 6/22/2000
    AN1857 A 3-Phase ac Induction Motor Control System Based on the MC68HC908MR32 pdf 278 0 6/22/2000
    AN1853 Embedding Microcontrollers in Domestic Refrigeration Appliances pdf 216 0 6/22/2000
    AN1844 Using a 68HC908MR32 in Place of a 68HC908MR24 pdf 214 0 6/22/2000
    AN1837 Non-Volatile Memory Technology Overview pdf 116 0 3/27/2000
    AN1843 Vacuum Cleaner Reference Platform pdf 326 0 9/13/2000
    AN1705 Noise Reduction Techniques for Microcontroller-Based Systems pdf 67 0 1/01/1999
    AN1831 Using MC68HC908 On-Chip FLASH Programming Routines ROM-Resident Routines in the MC68HC908GR8, MC68HC908KX8, MC68HC908JL3, MC68HC908JK3, and the MC68HC908JB8 pdf 294 1.0 9/11/2000
    AN1057 Selecting the Right Microcontroller Unit pdf 241 0 1/01/2000
    AN1827 Programming and Erasing FLASH Memory on the MC68HC908AS60 pdf 352 0 1/01/1999
    AN1792 Using an MC68HC908MR24 in Place of an MC68HC708MP16 pdf 95 1 1/01/2000
    AN1748 Building a Universal Serial Bus Keyboard Hub Using the Motorola MC68HC(9)08KH12 pdf 139 0 1/01/1998
    AN1731 VPW J1850 Multiplexing and Motorola Byte Data Link Controller (BDLC) Module pdf 235 0 1/01/1998
    AN1728 Making Low-Distortion Motor Waveforms with the MC68HC708MP16 pdf 149 1 1/01/1997
    AN1712 Get Your Motor Running with the MC68HC708MP16 pdf 342 0 1/01/1997
    AN1664 Low Cost 3-Phase ac Motor Control System Based on MC68HC908MR24 pdf 540 0 1/01/1996
    AN1624 ITC137 68HC708MP16 Motion Control Development Board pdf 175 0 1/01/1997
    AN1274 HC08 SCI Operation with Various Input Clocks pdf 57 0 1/01/1996
    AN1221 Hamming Error Control Coding Techniques with the HC08 MCU pdf 73 0 1/01/1993
    AN1219 M68HC08 Integer Math Routines pdf 170 1 1/01/1997
    AN-HK-33 In-Circuit Programming of FLASH Memory in the MC68HC908JL3 pdf 69 1 3/27/2000
    AN-HK-32 In-Circuit Programming of FLASH Memory in the MC68HC908GP32 pdf 79 2.0 8/10/2000
    AN-HK-31 Using the MC68HC908GP32 in Place of MC68HC908GP20 pdf 942 0 1/01/1999
    AN1783 Determining MCU Oscillator Start-Up Parameters pdf 48 1 1/01/1999
    AN1771 Precision Sine-Wave Tone Synthesis Using 8-Bit MCUs pdf 250 0 1/01/1998
    AN1744 Resetting Microcontrollers During Power Transitions pdf 80 0 1/01/1998
    AN1752 Data Structures for 8-Bit Microcontrollers pdf 213 1 5/07/2001
    AN1775 Expanding Digital Input with an A/D Converter pdf 86 1 1/01/1998
    AN4006 Digital Captive Discharge Ignition System Using HC05/HC08 8-Bit Microcontrollers pdf 61 0 3/27/2000
    AN2103 Local Interconnect Network (LIN) Demonstration pdf 953 0 12/01/2000
    AN1743 Scrolling Message Software pdf 127 0 1/01/1998
    AN1263 Designing for Electromagnetic Compatibility with Single-Chip Microcontrollers pdf 104 0 1/01/1995
    AN1259 System Design and Layout Techniques for Noise Reduction in MCU-Based Systems pdf 78 0 1/01/1995
    AN1222 Arithmetic Waveform Synthesis with the HC05/08 MCUs pdf 26 0 1/01/1993
    AN1218 HC05 to HC08 Optimization pdf 347 2 1/01/1993
    AN1050 Designing for Electromagnetic Compatibility (EMC) with HCMOS Microcontrollers pdf 82 0 1/01/2000
    AN477 Simple A/D for MCUs without Built-In A/D Converters pdf 224 0 1/01/1993


    Data Sheets
    ID Name Format Size K Rev # Date Last Modified
    MC68HC908RK2 Advance Information: MC68HC908RK2 pdf 2448 3 6/18/2001


    Engineering Bulletin
    ID Name Format Size K Rev # Date Last Modified
    EB368 In-Circuit Programming of FLASH Memory Using the Monitor Mode for the MC68HC908GR8 pdf 176 1 1/11/2001
    EB370 In-Circuit Programming of FLASH Memory Using the Monitor Mode for the MC68HC908MR16/32 pdf 204 1 5/07/2001
    EB369 In-Circuit Programming of FLASH Memory Using the Monitor Mode for the MC68HC908KX2/8 pdf 183 1 5/07/2001
    EB367 In-Circuit Programming of FLASH Memory Using the Monitor Mode for the MC68HC908JL/JK pdf 316 0 10/13/2000
    EB366 In-Circuit Programming of FLASH Memory Using the Monitor Mode for the MC68HC908GP32 pdf 294 0 10/13/2000
    EB349 RAM Data Retention Considerations for Motorola Microcontrollers pdf 45 0 6/22/2000


    Miscellaneous
    ID Name Format Size K Rev # Date Last Modified
    68HC908RK2MSE1 68HC908RK2 68HC908RK2 8-Bit Microcontroller Unit Mask Set Errata 1 pdf 16 0 9/08/2000


    Reference Manual
    ID Name Format Size K Rev # Date Last Modified
    CPU08RM CPU08RM Central Processor Unit Reference Manual pdf 2342 3 3/19/2001
    CPU08RMAD CPU08 Reference Manual Addendum pdf 234 0 1/01/1995
    TIM08RM TIM08 Timer Interface Module Reference Manual pdf 771 1.0 1/10/1996
    TIM08RMAD TIM08 Timer Interface Module Reference Manual Addendum pdf 557 0 1/01/1995
    DMA08RM Direct Memory Access Reference Manual pdf 463 1 2/23/2000
    DRM002 USB08 Universal Serial Bus Evaluation Board Using the MC68HC908JB8 Designer Reference Manual pdf 1845 0 4/12/2001
    DRM001 Passive Infrared (PIR) Intruder Detection Using the MC68HC908JK1/3, Incorporating Remote Control Adjustment Using the MC68HC908GP32 pdf 2504 0 2/20/2001
    M68HC08RG HC08 Family Reference Guide pdf 3374 1 2/23/2000
    M68HC08RGAD Addendum to HC08 Family Reference Guide, Revision 1 pdf 686 0 2/23/2000


    Selector Guide
    ID Name Format Size K Rev # Date Last Modified
    SG187 Automotive Selector Guide 3Q, 2001 pdf 823 7 6/29/2001
    SG188 Microcontroller Development Tool Configuration and Order Information Selector Guide pdf 154 2 1/01/2001
    SG186 Microcontroller Selector Guide Quarter 3, 2001 pdf 490 8 6/29/2001

     

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    68HC908RK2 Boards/Reference Designs

    ID Name
    ICS0508 8-bit ICS Development Tool Kit
    M68MMDS0508 MMDS0508 Modular Development System
    M68MMPFB0508 MMEVS Modular Evaluation System

     

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