參數(shù)資料
    型號: MC9S12C96PVPB25
    廠商: FREESCALE SEMICONDUCTOR INC
    元件分類: 微控制器/微處理器
    英文描述: 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP52
    封裝: LQFP-52
    文件頁數(shù): 15/138頁
    文件大?。?/td> 2318K
    代理商: MC9S12C96PVPB25
    Device User Guide — 9S12C128DGV1/D V01.07
    109
    B.6 Reset, Oscillator and PLL
    This section summarizes the electrical characteristics of the various startup scenarios for Oscillator and
    Phase-Locked-Loop (PLL).
    B.6.1 Startup
    Table B-10 summarizes several startup characteristics explained in this section. Detailed description of the
    startup behavior can be found in the Clock and Reset Generator (CRG) Block User Guide.
    B.6.1.1 POR
    The release level VPORR and the assert level VPORA are derived from the VDD Supply. They are also valid
    if the device is powered externally. After releasing the POR reset the oscillator and the clock quality check
    are started. If after a time tCQOUT no valid oscillation is detected, the MCU will start using the internal self
    clock. The fastest startup time possible is given by nuposc.
    B.6.1.2 LVR
    The release level VLVRR and the assert level VLVRA are derived from the VDD Supply. They are also valid
    if the device is powered externally. After releasing the LVR reset the oscillator and the clock quality check
    are started. If after a time tCQOUT no valid oscillation is detected, the MCU will start using the internal self
    clock. The fastest startup time possible is given by nuposc.
    B.6.1.3 SRAM Data Retention
    Provided an appropriate external reset signal is applied to the MCU, preventing the CPU from executing
    code when VDD5 is out of specification limits, the SRAM contents integrity is guaranteed if after the reset
    the PORF bit in the CRG Flags Register has not been set.
    Table B-10 Startup Characteristics
    Conditions are shown in Table A-4 unless otherwise noted
    Num
    C
    Rating
    Symbol
    Min
    Typ
    Max
    Unit
    1
    T
    POR release level
    VPORR
    2.07
    V
    2
    T
    POR assert level
    VPORA
    0.97
    V
    3
    D
    Reset input pulse width, minimum input time
    PWRSTL
    2
    tosc
    4
    D
    Startup from Reset
    nRST
    192
    196
    nosc
    5D
    Interrupt pulse width, IRQ edge-sensitive
    mode
    PWIRQ
    20
    ns
    6
    D
    Wait recovery startup time
    tWRS
    14
    tcyc
    F
    re
    e
    sc
    a
    le
    S
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    ic
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    d
    u
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    r,
    I
    Freescale Semiconductor, Inc.
    For More Information On This Product,
    Go to: www.freescale.com
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