• 參數(shù)資料
    型號: BU-62864F4-430Y
    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: 1 INCH, CERAMIC, QFP-72
    文件頁數(shù): 86/99頁
    文件大?。?/td> 578K
    代理商: BU-62864F4-430Y
    Data Device Corporation
    62743_pre7_noSA-DB.DOC
    www.ddc-web.com
    8-07-02
    87
    Table 68. SIGNAL DESCRIPTIONS BY FUNCTIONAL GROUPS
    PROCESSOR INTERFACE CONTROL
    SIGNAL
    NAME
    PIN
    (F & G
    Package)
    DESCRIPTION
    SSFLAG* (I)/
    EXT_TRIG (I)
    14
    Subsystem Flag (RT) or External Trigger (BC/Word Monitor) input.
    In RT
    mode, if this input is asserted low, the Subsystem Flag bit will be set in the PCI
    ENHANCED MINI-ACE's RT Status Word. If the SSFLAG* input is logic "0"
    while bit 8 of Configuration Register #1 has been programmed to logic "1"
    (cleared), the Subsystem Flag RT Status Word bit will become logic "1," but bit
    8 of Configuration Register #1, SUBSYSTEM FLAG*, will return logic "1"
    when read. That is, the sense on the SSFLAG* input has no effect on the
    SUBSYSTEM FLAG* register bit.
    In the non-enhanced BC mode, this signal operates as an External Trigger
    input.
    In BC mode, if the external BC Start option is enabled (bit 7 of
    Configuration Register #1), a low to high transition on this input will issue a BC
    Start command, starting execution of the current BC frame.
    In the enhanced BC mode, during the execution of a Wait for External Trigger
    (WTG) instruction, the PCI Enhanced Mini-ACE BC will wait for a low-to-high
    transition on EXT_TRIG before proceeding to the next instruction.
    In the Word Monitor mode, if the external trigger is enabled (bit 7 of
    Configuration Register #1), a low to high transition on this input will initiate a
    monitor start. (RT the monitor on low).
    This input has no effect in Message Monitor mode.
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