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  • 參數(shù)資料
    型號: M38B52EDXXXFS
    廠商: Renesas Technology Corp.
    英文描述: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
    中文描述: 單芯片8位CMOS微機(jī)
    文件頁數(shù): 49/70頁
    文件大?。?/td> 864K
    代理商: M38B52EDXXXFS
    MITSUBISHI MICROCOMPUTERS
    38B5 Group
    SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
    48
    PRELIMINARY
    Notice: This s not a final specification.
    Some parametric imits are subject to change.
    Pulse Width Modulation (PWM)
    The 38B5 group has a PWM function with a 14-bit resolution. When
    the oscillation frequency X
    IN
    is 4 MHz, the minimum resolution bit
    width is 250 ns and the cycle period is 4096 μs. The PWM timing
    generator supplies a PWM control signal based on a signal that is
    the frequency of the X
    IN
    clock.
    The explanation in the rest of this data sheet assumes X
    IN
    = 4 MHz.
    14
    1/2
    X
    IN
    (4MHz)
    P8
    7
    /PWM
    0
    bit7
    bit0
    bit5
    MSB
    LSB
    PWM
    bit7
    bit0
    Data bus
    X
    CIN
    “1”
    “0”
    PWM register (high-order)
    (address 0014
    16
    )
    PWM register (low-order)
    (address 0015
    16
    )
    It is set to “1”
    when write.
    PWM latch (14-bit)
    14-bit PWM circuit
    When an internal
    system clock
    selection bit is set
    to “0”
    Timing
    generating
    unit for PWM
    (64
    μ
    s cycle)
    (4096
    μ
    s cycle)
    P8
    7
    /PWM output
    selection bit
    P8
    7
    direction
    register
    P8
    7
    /PWM output
    selection bit
    P8
    7
    latch
    Fig. 53 PWM Block Diagram
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    參數(shù)描述
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