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    參數(shù)資料
    型號(hào)： BU-61865G4-180L
    廠商： DATA DEVICE CORP
    元件分類： 微控制器/微處理器
    英文描述： 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72
    封裝： 25.40 X 25.40 MM, 2.54 MM HEIGHT, CERAMIC, QFP-72
    文件頁(yè)數(shù)： 14/60頁(yè)
    文件大?。?/td> 457K
    代理商： BU-61865G4-180L
    21
    Data Device Corporation
    www.ddc-web.com
    BU-6174X/6184X/6186X
    F-10/02-300
    BC MESSAGE SEQUENCE CONTROL
    The Enhanced Mini-ACE/-ACE BC message sequence control
    capability enables a high degree of offloading of the host proces-
    sor. This includes using the various timing functions to enable
    autonomous structuring of major and minor frames. In addition,
    by implementing conditional jumps and subroutine calls, the
    message sequence control processor greatly simplifies the
    insertion of asynchronous, or "out-of-band" messages.
    Execute and Flip Operation. The Enhanced Mini-ACE/-ACE
    BC's XQF, or "Execute and Flip" operation, provides some
    unique capabilities. Following execution of this unconditional
    instruction, if the condition code tests TRUE, the BC will modify
    the value of the current XQF instruction's pointer parameter by
    toggling bit 4 of the pointer. That is, if the selected condition flag
    tests true, the value of the parameter will be updated to the
    value = old address XOR 0010h. As a result, the next time that
    this line in the instruction list is executed, the Message
    Control/Status Block at the updated address (old address XOR
    0010h) will be processed, rather than the one at the old address.
    The operation of the XQF instruction is illustrated in FIGURE 4.
    There are multiple ways of utilizing the "execute and flip" instruc-
    tion. One is to facilitate the implementation of a double buffering
    data scheme for individual messages. This allows the message
    sequence control processor to "ping-pong" between a pair of
    data buffers for a particular message. By doing so, the host
    processor can access one of the two Data Word blocks, while the
    BC reads or writes the alternate Data Word block.
    A second application of the "execute and flip" capability is in con-
    junction with message retries. This allows the BC to not only
    switch buses when retrying a failed message, but to automati-
    cally switch buses permanently for all future times that the same
    message is to be processed. This not only provides a high
    degree of autonomy from the host CPU, but saves BC band-
    width, by eliminating the need for future attempts to process
    messages on an RT's failed channel.
    XQF
    POINTER
    XX00h
    (part of) BC INSTRUCTION LIST
    MESSAGE
    CONTROL/STATUS
    BLOCK 0
    DATA BLOCK 0
    XX00h
    MESSAGE
    CONTROL/STATUS
    BLOCK 1
    DATA BLOCK 1
    POINTER
    FIGURE 4. EXECUTE and FLIP (XQF) OPERATION
    相關(guān)PDF資料
    PDF描述
    BU-61703F3-110K 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72
    BU-61703F3-152Q 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72
    BU-61703F3-162W 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72
    BU-61703F4-110L 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72
    BU-61703F4-112Y 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72
    相關(guān)代理商/技術(shù)參數(shù)
    參數(shù)描述
    BU-61XXX 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MINIATURE ADVANCED COMMUNICATION ENGINE (MINI-ACE) AND MINI-ACE PLUS
    BU-62-0 功能描述:測(cè)試電夾 INSULATOR FOR 60 SERIES BLACK RoHS:否 制造商:Pomona Electronics 類型:Minigrabber clip 顏色:Black
    BU-62-2 功能描述:測(cè)試電夾 INSULATOR FOR 60 SERIES RED RoHS:否 制造商:Pomona Electronics 類型:Minigrabber clip 顏色:Black
    BU-62-4 功能描述:測(cè)試電夾 INSULATOR FOR 60 SERIES YELLOW RoHS:否 制造商:Pomona Electronics 類型:Minigrabber clip 顏色:Black
    BU-62-5 功能描述:測(cè)試電夾 INSULATOR FOR 60 SERIES GREEN RoHS:否 制造商:Pomona Electronics 類型:Minigrabber clip 顏色:Black
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