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  • 參數(shù)資料
    型號: MC68HC711D0CFN3
    廠商: FREESCALE SEMICONDUCTOR INC
    元件分類: 微控制器/微處理器
    英文描述: 8-BIT, OTPROM, 3 MHz, MICROCONTROLLER, PQCC44
    封裝: PLASTIC, LCC-44
    文件頁數(shù): 62/124頁
    文件大?。?/td> 6875K
    代理商: MC68HC711D0CFN3
    OPERATING MODES AND ON-CHIP MEMORY
    4-8
    TECHNICAL DATA
    PSEL[3:0] — Priority Select Bits
    4.2.2 System Initialization
    Registers and bits that control initialization and the basic configuration of the MCU are
    protected against writes except under special circumstances. The protection mecha-
    nism, overridden in special operating modes, permits writing these bits only within the
    first 64 bus cycles after any reset, and then only once after each reset. If the MCU is
    going to be changed to a normal mode after being reset in a special mode, write to the
    protected registers before writing the SMOD control bit to zero.
    4.2.2.1 CONFIG Register
    The CONFIG register consists of static latches that control the startup configuration of
    the MCU. CONFIG is writable only once in expanded and single-chip modes (SMOD
    = 0). In these modes, the COP watchdog timer is enabled out of reset.
    Bits [7:3] and 0 — Not implemented
    Always read zero
    NOCOP — COP System Disable
    This bit is cleared out of reset in normal modes (COP enabled). Refer to SECTION 5
    0 = COP system enabled
    1 = COP system disabled
    ROMON — ROM Enable
    In all modes, ROMON is forced to one out of reset. Writable once in normal modes and
    writable at any time in special modes.
    0 = ROM removed from the memory map
    1 = ROM present in the memory map
    Mode
    IRVNE Out
    of Reset
    E Clock Out
    of Reset
    IRV Out of
    Reset
    IRVNE
    Affects Only
    Single-Chip
    0
    On
    Off
    E
    Expanded
    0
    On
    Off
    IRV
    Boot
    0
    On
    Off
    E
    Special Test
    1
    On
    IRV
    CONFIG — System Configuration
    $003F
    Bit 7
    654321
    Bit 0
    00000
    NOCOP
    ROMON
    0
    RESET:
    00000
    0
    F
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    Freescale Semiconductor, Inc.
    For More Information On This Product,
    Go to: www.freescale.com
    n
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    相關(guān)代理商/技術(shù)參數(shù)
    參數(shù)描述
    MC68HC711D3CFBE2 制造商:Freescale Semiconductor 功能描述:
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