參數(shù)資料
    型號: MC68HC705SP7CP
    廠商: FREESCALE SEMICONDUCTOR INC
    元件分類: 微控制器/微處理器
    英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP28
    封裝: PLASTIC, DIP-28
    文件頁數(shù): 26/164頁
    文件大?。?/td> 1165K
    代理商: MC68HC705SP7CP
    EPROM Registers
    MC68HC705JJ7 MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
    Freescale Semiconductor
    121
    DELAY — Stop Startup Delay Bit
    This EPROM bit selects the number of bus cycles that must elapse before bus activity begins following
    a restart from the stop mode.
    1 = Startup delay is 4064 bus cycles.
    0 = Startup delay is 16 bus cycles.
    CAUTION
    The 16-cycle delay option will work properly in devices with the internal
    low-power oscillator or with a steady external clock source. Check
    crystal/ceramic resonator specifications carefully before using the 16-cycle
    delay option with a crystal or ceramic resonator.
    OSCRES — Oscillator Resistor Bit
    This EPROM bit configures the internal shunt resistor.
    1 = Oscillator configured with 2 M shunt resistor
    0 = Oscillator configured without a shunt resistor
    NOTE
    The optional oscillator resistor is NOT recommended for devices that use
    an external RC oscillator. For such devices, this bit should be left erased as
    a 0.
    SWAIT — STOP Conversion to WAIT Bit
    This EPROM bit disables the STOP instruction and prevents inadvertently turning off the COP
    watchdog with a STOP instruction. When the SWAIT bit is set, a STOP instruction puts the MCU in
    halt mode. Halt mode is a wait-like low-power state. The internal oscillator and timer clock continue to
    run, but the CPU clock stops. When the SWAIT bit is clear, a STOP instruction stops the internal
    oscillator, the internal clock, the CPU clock, the timer clock, and the COP watchdog timer.
    1 = STOP instruction converted to WAIT instruction
    0 = STOP instruction not converted to WAIT instruction
    LVREN — Low-Voltage Reset Enable Bit
    This EPROM bit enables the low-voltage reset (LVR) function.
    1 = LVR function enabled
    0 = LVR function disabled
    PIRQ — Port A IRQ Enable Bit
    This EPROM bit enables the PA3–PA0 pins to function as external interrupt sources.
    1 = PA3–PA0 enabled as external interrupt sources
    0 = PA3–PA0 not enabled as external interrupt sources
    LEVEL — External Interrupt Sensitivity Bit
    This EPROM bit makes the external interrupt inputs level-triggered as well as edge-triggered
    1 = IRQ/VPP pin negative-edge triggered and low-level triggered;
    PA3–PA0 pins positive-edge triggered and high-level triggered
    0 = IRQ/VPP pin negative-edge triggered only; PA3–PA0 pins positive-edge triggered only
    COPEN — COP Watchdog Enable Bit
    This EPROM bit enables the COP watchdog.
    1 = COP watchdog enabled
    0 = COP watchdog disabled
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