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    參數(shù)資料
    型號: TS80C51RD2-LIB
    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): 31/85頁
    文件大?。?/td> 762K
    代理商: TS80C51RD2-LIB
    31
    4188E–8051–08/06
    AT/TS8xC51Rx2
    Figure 6-7.
    PCA Compare Mode and PCA Watchdog Timer
    Before enabling ECOM bit, CCAPnL and CCAPnH should be set with a non zero value, other-
    wise an unwanted match could happen. Writing to CCAPnH will set the ECOM bit.
    Once ECOM set, writing CCAPnL will clear ECOM so that an unwanted match doesn’t occur
    while modifying the compare value. Writing to CCAPnH will set ECOM. For this reason, user
    software should write CCAPnL first, and then CCAPnH. Of course, the ECOM bit can still be
    controlled by accessing to CCAPMn register.
    6.3.3
    High Speed Output Mode
    In this mode the CEX output (on port 1) associated with the PCA module will toggle each time a
    match occurs between the PCA counter and the module's capture registers. To activate this
    mode the TOG, MAT, and ECOM bits in the module's CCAPMn SFR must be set (See Figure 6-
    8).
    A prior write must be done to CCAPnL and CCAPnH before writing the ECOMn bit.
    CH
    CL
    CCAPnH
    CCAPnL
    ECOMn
    CCAPMn, n = 0 to 4
    0xDA to 0xDE
    CAPNn MATn TOGn PWMn ECCFn
    CAPPn
    16 bit comparator
    Match
    CCON
    0xD8
    PCA IT
    Enable
    PCA counter/timer
    RESET *
    CIDL
    CPS1
    CPS0
    ECF
    CMOD
    0xD9
    WDTE
    *
    Only for Module 4
    Reset
    Write to
    CCAPnL
    Write to
    CCAPnH
    CF
    CCF2
    CCF1
    CCF0
    CR
    CCF3
    CCF4
    1
    0
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    參數(shù)描述
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