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    參數(shù)資料
    型號: MC9S12DJ128
    廠商: Motorola, Inc.
    英文描述: FUSE, QUICK BLOW 2A
    中文描述: MC9S12DT128設(shè)備的用戶手冊V02.09
    文件頁數(shù): 69/124頁
    文件大小: 2125K
    代理商: MC9S12DJ128
    69
    Section 4 Modes of Operation
    4.1 Overview
    Eight possible modes determine the operating configuration of the MC9S12DP512. Each mode has an
    associated default memory map and external bus configuration controlled by a further pin.
    Three low power modes exist for the device (
    Section 4.4 Low Power Modes
    ).
    4.2 Chip Configuration Summary
    TheoperatingmodeoutofresetisdeterminedbythestatesoftheMODC,MODB,andMODApinsduring
    reset(
    Table 4-1
    ).TheMODC,MODB,andMODAbitsintheMODEregistershowthecurrentoperating
    modeandprovidelimitedmodeswitchingduringoperation.ThestatesoftheMODC,MODB,andMODA
    pinsarelatchedintothesebitsontherisingedgeoftheresetsignal.TheROMCTLsignalallowsthesetting
    of the ROMON bit in the MISC register thus controlling whether the internal Flash is visible in the
    memory map. ROMON = 1 means the Flash is visible in the memory map. The state of the ROMCTL pin
    is latched into the ROMON bit in the MISC register on the rising edge of the reset signal.
    For further explanation on the modes refer to the HCS12 Multiplexed External Bus Interface (MEBI)
    Block Guide.
    Table 4-1 Mode Selection
    BKGD =
    MODC
    PE6 =
    MODB
    PE5 =
    MODA
    PK7 =
    ROMCTL
    ROMON
    Bit
    Mode Description
    0
    0
    0
    X
    1
    Special Single Chip, BDM allowed and ACTIVE. BDM is
    allowed in all other modes but a serial command is
    required to make BDM active.
    0
    0
    1
    0
    1
    X
    0
    1
    X
    0
    1
    1
    0
    0
    1
    0
    1
    0
    1
    Emulation Expanded Narrow, BDM allowed
    0
    1
    0
    Special Test (Expanded Wide), BDM allowed
    0
    1
    1
    Emulation Expanded Wide, BDM allowed
    1
    0
    0
    Normal Single Chip, BDM allowed
    1
    0
    1
    Normal Expanded Narrow, BDM allowed
    1
    1
    0
    X
    1
    Peripheral; BDM allowed but bus operations would cause
    bus conflicts (must not be used)
    1
    1
    1
    0
    1
    0
    1
    Normal Expanded Wide, BDM allowed
    F
    Freescale Semiconductor, Inc.
    For More Information On This Product,
    Go to: www.freescale.com
    n
    .
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