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    參數(shù)資料
    型號(hào): TS87C51RB2-LIE
    廠商: International Rectifier
    英文描述: High Performance 8-bit Microcontroller
    中文描述: 高性能8位微控制器
    文件頁數(shù): 25/85頁
    文件大?。?/td> 762K
    代理商: TS87C51RB2-LIE
    25
    4188E–8051–08/06
    AT/TS8xC51Rx2
    Figure 6-4.
    PCA Timer/Counter
    Table 6-4.
    CMOD: PCA Counter Mode Register
    The CMOD SFR
    includes three additional bits associated with the PCA (See Figure 6-4 and
    Table 6-4).
    CIDL
    CPS1
    CPS0
    ECF
    It
    CH
    CL
    16 bit up/down counter
    To PCA
    modules
    Fosc /12
    Fosc / 4
    T0 OVF
    P1.2
    Idle
    CMOD
    0xD9
    WDTE
    CF
    CR
    CCON
    0xD8
    CCF4 CCF3
    CCF2
    CCF1
    CCF0
    overflow
    CMOD
    Address 0D9H
    CIDL
    WDTE
    -
    -
    -
    CPS1
    CPS0
    ECF
    Reset value
    0
    0
    X
    X
    X
    0
    0
    0
    Symbol
    Function
    CIDL
    Counter Idle control: CIDL = 0 programs the PCA Counter to continue functioning during idle Mode.
    CIDL = 1 programs it to be gated off during idle.
    WDTE
    Watchdog Timer Enable: WDTE = 0 disables Watchdog Timer function on PCA Module 4. WDTE = 1
    enables it.
    -
    Not implemented, reserved for future use.
    (1)
    1.
    User software should not write 1s to reserved bits. These bits may be used in future 8051 family
    products to invoke new features. In that case, the reset or inactive value of the new bit will be 0,
    and its active value will be 1. The value read from a reserved bit is indeterminate.
    f
    osc
    = oscillator frequency
    CPS1
    PCA Count Pulse Select bit 1.
    CPS0
    PCA Count Pulse Select bit 0.
    CPS1
    CPS0
    Selected PCA input.
    (2)
    2.
    0
    0
    Internal clock f
    osc
    /12 ( Or f
    osc
    /6 in X2 Mode).
    0
    1
    Internal clock f
    osc
    /4 ( Or f
    osc
    /2 in X2 Mode).
    1
    0
    Timer 0 Overflow
    1
    1
    External clock at ECI/P1.2 pin (max rate = f
    osc
    / 8)
    ECF
    PCA Enable Counter Overflow interrupt: ECF = 1 enables CF bit in CCON to generate an interrupt.
    ECF = 0 disables that function of CF.
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