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        參數(shù)資料
        型號(hào): M38869MFA-XXXGP
        廠商: Mitsubishi Electric Corporation
        英文描述: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
        中文描述: 單芯片8位CMOS微機(jī)
        文件頁(yè)數(shù): 62/110頁(yè)
        文件大小: 1601K
        代理商: M38869MFA-XXXGP
        62
        3886 Group
        SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
        MITSUBISHI MICROCOMPUTERS
        BUS CONTROL AT MEMORY EXPANSION
        The M38867M8A/E8A have a built-in ONW function to facilitate
        access to an external (expanded) memory and I/O devices in
        memory expansion mode or microprocessor mode.
        If an “L” level signal is input to the P3
        2
        /ONW pin when the CPU is
        in a read or write state, the corresponding read or write cycle is
        extended by one cycle of
        φ
        . During this extended term, the RD
        and WR signals remain at “L.” This extension function is valid only
        for writing to and reading from addresses 0000
        16
        to 0007
        16
        and
        0440
        16
        to FFFF
        16
        , and only read and write cycles are extended.
        Fig. 64 ONW function timing
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