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    參數(shù)資料
    型號: μPD75P70076
    廠商: NEC Corp.
    英文描述: 4 Bit Single Chip Microcontrollers(4位單片微控制器)
    中文描述: 4位單片微控制器(4位單片微控制器)
    文件頁數(shù): 35/62頁
    文件大小: 290K
    代理商: ΜPD75P70076
    m
    PD75P0076
    35
    XT1
    XT2
    SUBSYSTEM CLOCK OSCILLATOR CHARACTERISTICS (T
    A
    = –40 to +85°C, V
    DD
    = 1.8 to 5.5 V)
    Resonator
    Recommended constant
    Parameter
    Test conditions
    MIN.
    TYP.
    MAX.
    Unit
    Crystal
    Oscillation
    32
    32.768
    35
    kHz
    resonator
    frequency (f
    XT
    )
    Note 1
    Oscillation
    V
    DD
    = 4.5 to 5.5 V
    1.0
    2
    s
    stabilization time
    Note 2
    10
    External
    XT1 input frequency
    32
    100
    kHz
    clock
    (f
    XT
    )
    Note 1
    XT1 input high-/low-level
    5
    15
    m
    s
    width (t
    XTH
    , t
    XTL
    )
    Notes 1.
    Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time.
    2.
    The oscillation stabilization time is necessary for oscillation to stabilize after applying V
    DD
    .
    Caution
    When using the subsystem clock oscillator, wiring in the area enclosed with the dotted line should
    be carried out as follows to avoid an adverse effect from wiring capacitance.
    Wiring should be as short as possible.
    Wiring should not cross other signal lines.
    Wiring should not be placed close to a varying high current.
    The potential of the oscillator capacitor ground should be the same as V
    SS
    .
    Do not ground it to the ground pattern in which a high current flows.
    Do not fetch a signal from the oscillator.
    The subsystem clock oscillator is designed as a low amplification circuit to provide low consumption
    current, causing misoperation by noise more frequently than the main system clock oscillation
    circuit. Special care should therefore be taken for wiring method when the subsystem clock is used.
    XT2
    XT1
    C4
    C3
    R
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