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  • 參數(shù)資料
    型號: MC68331CFC25B1
    廠商: MOTOROLA INC
    元件分類: 微控制器/微處理器
    英文描述: 32-BIT, 25 MHz, MICROCONTROLLER, PQFP132
    封裝: 0.950 X 0.950 INCH, 0.025 INCH PITCH, PLASTIC, QFP-132
    文件頁數(shù): 27/90頁
    文件大?。?/td> 481K
    代理商: MC68331CFC25B1
    MC68331
    MOTOROLA
    MC68331TS/D
    33
    R/W —Read/Write
    This field causes a chip select to be asserted only for a read, only for a write, or for both read and write.
    Refer to the following table for options available.
    STRB —Address Strobe/Data Strobe
    0 = Address strobe
    1 = Data strobe
    This bit controls the timing for assertion of a chip select in asynchronous mode. Selecting address
    strobe causes chip select to be asserted synchronized with address strobe. Selecting data strobe caus-
    es chip select to be asserted synchronized with data strobe.
    DSACK —Data and Size Acknowledge
    This field specifies the source of DSACK in asynchronous mode. It also allows the user to adjust bus
    timing with internal DSACK generation by controlling the number of wait states that are inserted to op-
    timize bus speed in a particular application. The following table shows the DSACK field encoding. The
    fast termination encoding (1110) is used for two-cycle access to external memory.
    Byte
    Description
    00
    Disable
    01
    Lower Byte
    10
    Upper Byte
    11
    Both Bytes
    R/W
    Description
    00
    Reserved
    01
    Read Only
    10
    Write Only
    11
    Read/Write
    DSACK
    Description
    0000
    No Wait States
    0001
    1 Wait State
    0010
    2 Wait States
    0011
    3 Wait States
    0100
    4 Wait States
    0101
    5 Wait States
    0110
    6 Wait States
    0111
    7 Wait States
    1000
    8 Wait States
    1001
    9 Wait States
    1010
    10 Wait States
    1011
    11 Wait States
    1100
    12 Wait States
    1101
    13 Wait States
    1110
    Fast Termination
    1111
    External DSACK
    相關(guān)PDF資料
    PDF描述
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    MC68331CFC16 32-BIT, 16.78 MHz, MICROCONTROLLER, PQFP132
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    參數(shù)描述
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