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    參數(shù)資料
    型號(hào): MC68HC705J2VP
    廠商: MOTOROLA INC
    元件分類: 微控制器/微處理器
    英文描述: HCMOS MICROCONTROLLER UNIT
    中文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP20
    封裝: PLASTIC, DIP-20
    文件頁數(shù): 43/82頁
    文件大?。?/td> 327K
    代理商: MC68HC705J2VP
    MC68HC705J2
    Rev. 2
    TIMER
    MOTOROLA
    7-1
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    SECTION 7
    TIMER
    This section describes the operation of the timer and the COP timer.
    Figure 7-1
    shows the organization of the timer system.
    Figure 7-1. Timer
    INTERNAL PROCESSOR
    CLOCK
    (XTAL
    ÷
    2)
    FIXED
    DIVIDE BY
    4
    ÷
    2
    ÷
    2
    ÷
    2
    ÷
    2
    ÷
    2
    ÷
    2
    ÷
    2
    ÷
    2
    M
    L
    TCR $0009
    TIMER COUNTER REGISTER
    ÷
    2
    ÷
    2
    ÷
    2
    ÷
    2
    ÷
    2
    TCSR $0008
    T
    T
    R
    0
    0
    R
    R
    LEAST SIGNIFICANT EIGHT BITS OF 15-STAGE RIPPLE COUNTER
    MOST SIGNIFICANT SEVEN BITS OF 15-STAGE RIPPLE COUNTER
    ÷
    2
    ÷
    2
    RTI RATE SELECT
    ÷
    2
    ÷
    2
    ÷
    2
    CLEAR COP TIMER
    S
    Q
    R
    COP TIMER RESET
    TIMER CONTROL AND STATUS REGISTER
    POWER-ON
    RESET (POR)
    INTERRUPT CIRCUIT
    R
    INTERRUPT REQUEST
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