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參數(shù)資料
| 型號： | CT19901 |
| 廠商： | Aeroflex Inc. |
| 英文描述： | MIL-STD-1553B Remote Terminal, Bus Controller, or Passive Monitor Hybrid with Status Word Control |
| 中文描述： | 符合MIL - STD - 1553B總線遠程終端，總線控制器，監(jiān)視器或被動混合控制的狀態(tài)字 |
| 文件頁數(shù)： | 9/29頁 |
| 文件大小： | 232K |
| 代理商： | CT19901 |
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Aeroflex Circuit Technology
SCDCT1990 REV B 8/21/00 Plainview NY (516) 694-6700
9
AUTOMATED SELF-TEST
The CT1991 has been designed to fully support a wrap-around self-test which ensures a high degree of fault
coverage. The monolithic circuit includes all circuitry required to perform the self-test.
Self-test can be an on-line or off-line function which is initiated by simple subsystem intervention. The DRVINH
signal selects on-line or off-line testing. The circuit accomplishes the on-line test without accessing the
MIL-STD-1553 data bus by providing an internal data path which connects the encoder circuitry directly to the
decoder circuitry. The transceiver is inhibited during this on-line test. The off-line test is designed to include the
transceiver as well as the protocol device. This mode will generally be useful as an off-line card test where no
live bus is in use.
To initiate the self-test a word is placed in the Vector Word Latch, Loop Test Enable (LTEN) is held low, and the
Loop Test Trigger (LTTRIG) signal is pulsed low. The primary bus will be tested with the word that resides in the
Vector Word Latch, encoded then looped back, decoded and presented to the subsystem as a normal data
transfer would be accomplished. The secondary bus is sequentially tested after the primary bus is completed
via Request Bus A (REQBUSA) utilizing the same word residing in the Vector Word Latch. Upon completion of
each test, pass/fail signals will be asserted reporting the results of the test. This test implementation verifies
MIL-STD-1553 protocol compliance; proper sync character, 16 data bits, Manchester II coding, odd parity,
contiguous word checking and a bit by bit comparison of the transmitted data. The self-test circuitry increases
the fault coverage by insuring that the internal function blocks; encoder, decoder, and internal control circuitry
are operating correctly. An effective data pattern to accomplish this is HEX AA55 since each bit is toggled, (8 bit
internal highway) on a high/low byte basis. The total time required to complete the self-test cycle is 89
microseconds. The Loop Test Enable signal must remain in the low state throughout the diagnostic cycle.
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PDF描述 |
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| CT1995 | MIL-STD-1553B Remote Terminal, Bus Controller, or Passive Monitor Hybrid with Status Word Control |
| CT1995-20 | MIL-STD-1553B Remote Terminal, Bus Controller, or Passive Monitor Hybrid with Status Word Control |
| CT1995-20-2 | MIL-STD-1553B Remote Terminal, Bus Controller, or Passive Monitor Hybrid with Status Word Control |
| CT1995-20-3 | MIL-STD-1553B Remote Terminal, Bus Controller, or Passive Monitor Hybrid with Status Word Control |
| CT1999 | CT1999 Remote Terminal and/or Bus Controller for MIL-STD-1553B |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CT1990-1-20 | 制造商:AEROFLEX 制造商全稱:AEROFLEX 功能描述:MIL-STD-1553B Remote Terminal, Bus Controller, or Passive Monitor Hybrid with Status Word Control |
| CT1990-SERIES | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Interface IC |
| CT1991-1-20 | 制造商:AEROFLEX 制造商全稱:AEROFLEX 功能描述:MIL-STD-1553B Remote Terminal, Bus Controller, or Passive Monitor Hybrid with Status Word Control |
| CT1995 | 制造商:AEROFLEX 制造商全稱:AEROFLEX 功能描述:MIL-STD-1553B Remote Terminal, Bus Controller, or Passive Monitor Hybrid with Status Word Control |
| CT1995-20 | 制造商:AEROFLEX 制造商全稱:AEROFLEX 功能描述:MIL-STD-1553B Remote Terminal, Bus Controller, or Passive Monitor Hybrid with Status Word Control |
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