• 參數(shù)資料
    型號: MC9S12D64
    廠商: Motorola, Inc.
    英文描述: MC9S12DJ64 Device User Guide V01.17
    中文描述: MC9S12DJ64設備的用戶手冊V01.17
    文件頁數(shù): 65/124頁
    文件大小: 2125K
    代理商: MC9S12D64
    65
    NOTE:
    All VSS pins must be connected together in the application.
    2.4.1 VDDX,VSSX — Power & Ground Pins for I/O Drivers
    External power and ground for I/O drivers. Because fast signal transitions place high, short-duration
    currentdemandsonthepowersupply,usebypasscapacitorswithhigh-frequencycharacteristicsandplace
    them as close to the MCU as possible. Bypass requirements depend on how heavily the MCU pins are
    loaded.
    2.4.2 VDDR, VSSR — Power & Ground Pins for I/O Drivers & Internal Voltage
    Regulator
    External power and ground for I/O drivers and input to the internal voltage regulator. Because fast signal
    transitions place high, short-duration current demands on the power supply, use bypass capacitors with
    high-frequency characteristics and place them as close to the MCU as possible. Bypass requirements
    depend on how heavily the MCU pins are loaded.
    2.4.3 VDD1, VDD2, VSS1, VSS2 — Internal Logic Power Supply Pins
    Power is supplied to the MCU through VDD and VSS. Because fast signal transitions place high,
    short-duration current demands on the power supply, use bypass capacitors with high-frequency
    characteristics and place them as close to the MCU as possible. This 2.5V supply is derived from the
    internal voltage regulator. There is no static load on those pins allowed. The internal voltage regulator is
    turned off, if VREGEN is tied to ground.
    NOTE:
    No load allowed except for bypass capacitors.
    2.4.4 VDDA, VSSA — Power Supply Pins for ATD and VREG
    VDDA, VSSA are the power supply and ground input pins for the voltage regulator and the analog to
    digital converter. It also provides the reference for the internal voltage regulator. This allows the supply
    voltage to the ATD and the reference voltage to be bypassed independently.
    2.4.5 VRH, VRL — ATD Reference Voltage Input Pins
    VRH and VRL are the reference voltage input pins for the analog to digital converter.
    2.4.6 VDDPLL, VSSPLL — Power Supply Pins for PLL
    Provides operating voltage and ground for the Oscillator and the Phased-Locked Loop. This allows the
    supply voltage to the Oscillator and PLL to be bypassed independently. This 2.5V voltage is generated by
    the internal voltage regulator.
    NOTE:
    No load allowed except for bypass capacitors.
    F
    Freescale Semiconductor, Inc.
    For More Information On This Product,
    Go to: www.freescale.com
    n
    .
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