參數(shù)資料
型號(hào)： BU-61843F4-100
英文描述： Telecommunication IC
中文描述： 通信集成電路
文件頁(yè)數(shù)： 9/32頁(yè)
文件大?。?/td> 833K
代理商： BU-61843F4-100
9
Data Device Corporation
www.ddc-web.com
BU-61559 Series
C-12/02-300
BC CONTROL WORD
For each of the BC Message Block formats, the first word in the
block is the BC Control Word.The BC Control Word is
not
trans-
mitted on the 1553 bus. Instead, it contains bits that select the
active bus and message format, enable off-line self-test, and
specifies the “expected value” of the BROADCAST COMMAND
RECEIVED RT Status bit.
The BC Control Word is followed by the Command Word to be
transmitted, and subsequently by a second Command Word (for
an RT-to-RT transfer), followed by data words to be transmitted
(for Receive commands). The location after the last word to be
transmitted is reserved for the Loopback Word. The Loopback
Word is an on-line self-test feature in which the received version
of the last transmitted word is stored in the next location in the
shared RAM.The subsequent locations after the Loopback Word
are reserved for received Status Words and Data Words (for
transmit messages).
The next word in RAM after the BC Control Word is the MIL-STD-
1553B Command Word (for an RT-to-RT or RT-to-Broadcast
transfer, it is the first of two Command Words).This word is read
by the 1553 protocol logic and transmitted on the 1553 bus.The
(first) Command Word is possibly followed by a second
Command Word or Data Words to be read from RAM and trans-
mitted. The location in RAM after the
last
transmitted word is
reserved for the Loopback Word. Subsequent locations in the
shared RAM are reserved for Status and possibly Data Words
anticipated to be received from the responding RT(s). Assuming
that the RT responds before a BC response timeout occurs,
these word(s) are stored in the allocated locations in the shared
RAM. If the Loopback test passes, and the RT responds before
the BC Response Timer times out with a “Correct” RT Status
Word (correct RT address and the “expected value” for the lower
11 bits), followed by the correct number of valid data words, the
Block Status Word will be written to indicate “End of Message,
No Errors” during the BC End-of-Message sequence. Note that
for an RT-to-RT transfer, the BU-61559 BC checks the Status
Words from
both
the transmitting and receiving RTs.
FIGURE 12. BC CONTROL WORD
FIGURE 11. BC MEMORY MANAGEMENT
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
BU-61843F4-110 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Telecommunication IC
BU-61843G3-100 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Telecommunication IC
BU-61843G3-110 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Telecommunication IC
BU-61843G4-100 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Telecommunication IC
BU-61843G4-110 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Telecommunication IC
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