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    參數(shù)資料
    型號: MC68HC05E5P
    廠商: FREESCALE SEMICONDUCTOR INC
    元件分類: 微控制器/微處理器
    英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28
    封裝: PLASTIC, DIP-28
    文件頁數(shù): 52/140頁
    文件大小: 847K
    代理商: MC68HC05E5P
    General Description
    Functional Pin Description
    MC68HC05E5 Rev. 1.0
    General Release Specification
    MOTOROLA
    General Description
    19
    NON-DISCLOSURE
    AGREEMENT
    REQUIRED
    1.5.1 V
    DD
    and V
    SS
    Power is supplied to the microcontroller using these two pins. V
    DD is the
    positive supply and V
    SS is ground.
    1.5.2 IRQ
    The maskable interrupt request (IRQ) has a programmable option that
    provides two different choices of interrupt triggering sensitivity. The
    options are:
    1. Negative edge-sensitive triggering only
    2. Both negative edge-sensitive and level-sensitive triggering
    The MCU completes the current instruction before it responds to the
    interrupt request. When IRQ goes low for at least one tILIH, a logic 1 is
    latched internally to signify an interrupt has been requested. When the
    MCU completes its current instruction, the interrupt latch is tested. If the
    interrupt latch contains a logic 1, and the interrupt mask bit (I bit) in the
    condition code register is clear, the MCU then begins the interrupt
    sequence.
    If the option is selected to include level-sensitive triggering, the IRQ input
    requires an external resistor to VDD for wired-OR operation.
    The IRQ pin contains an internal Schmitt trigger as part of its input to
    improve noise immunity. Refer to Section 4. Interrupts for more detail.
    NOTE:
    The voltage on the IRQ pin affects the mode of operation. For additional
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    Freescale Semiconductor, Inc.
    For More Information On This Product,
    Go to: www.freescale.com
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