參數(shù)資料
    型號: BU-62864F3-892L
    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): 11/99頁
    文件大小: 578K
    代理商: BU-62864F3-892L
    Data Device Corporation
    62743_pre7_noSA-DB.DOC
    www.ddc-web.com
    8-07-02
    19
    Strobe or Request signal is asserted. Four possible FAILSAFE Modes
    determine how this situation is handled:
    Table 11. FAILSAFE MODE
    BIT 17
    BIT 16
    FAILSAFE MODE
    0
    FailSafe Off
    0
    1
    FailSafe Retry
    1
    0
    FailSafe Halt
    1
    FailSafe Skip
    NOTE: Failsafe errors are extremely unlikely.
    MODE 1 - FAILSAFE OFF. PCI Enhanced Mini-ACE will wait indefinitely for the
    transaction to complete. The local bus could hang as a result. The FAILSAFE
    ERROR bit and interrupt will not be generated even if the enable bit is set.
    MODE 2 - FAILSAFE RETRY. PCI Enhanced Mini-ACE will retry the transfer on
    the local bus when the FAILSAFE timer times out.
    MODE 3 - FAILSAFE HALT. Once the FAILSAFE timer times out, all future
    transfers will be terminated with a target abort until the PCI master clears the
    interrupt.
    MODE 4 - FAILSAFE SKIP. Once the FAILSAFE timer times out, the current
    transaction is discarded or skipped and the next transaction, whether a stored
    write in the FIFO or a new transaction, will be attempted.
    BITS 15-0 ARE RESERVED: Write these bits as 0s.
    Table 12. REG2 Fail-Safe Timer Register
    (Read 808h)
    BIT
    DESCRIPTION
    31 (MSB)
    0
    16
    0
    15
    FAIL-SAFE TIMER COUNT - BIT 15 (MSB)
    0 (LSB)
    FAIL-SAFE TIMER COUNT - BIT 0 (LSB)
    FAIL-SAFE TIMER COUNT: Read this register to obtain the current value of the
    fail-safe timer. Default is 8400h.
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