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    參數(shù)資料
    

    


    


    
型號(hào)：
BU-61703F4-190L

    

    
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：
CERAMIC, QFP-72

    

    
文件頁(yè)數(shù)：
30/54頁(yè)

    

    
文件大?。?/td>
576K

    

    
代理商：
BU-61703F4-190L


    

    

    

	
    
    
    

    
    
	
    36
    Data Device Corporation
    www.ddc-web.com
    BU-61703/61705
    D1 web-09/02-0
    BIT WORD
    The BU-61703/5 provides an internally formulated Built-In-Test
    word (BIT word). This word is transmitted to the BC in response
    to a Transmit BIT Word Mode Code Command. The BIT word bit
    functions and descriptions are provided in TABLE 5.
    If set, indicates that, for the previous message, the SSRT was the receiving RT for an RT-to-RT trans-
    fer and that the transmitting RT either did not respond or responded later than the SSRT RT-to-RT
    timeout time. The SSRT's RT-to-RT response timeout time is defined as the time from the mid-bit
    crossing of the parity bit of the transmit Command Word to the mid-sync crossing of the transmitting
    RT status word. The value of the SSRT's RT-to-RT response timeout time is in the range from 17.5 to
    19.5 s.
    Indicates that a received command word is not defined in accordance with MIL-STD-1553B. This
    includes the following undefined Command Words: (1) The Command Word is a non-mode code,
    broadcast, transmit command; (2) a message with a T/R bit of "0", a subaddress/mode field of 00000
    or 11111, and a mode code field with a value between 00000 and 01111; (3) a mode code command
    that is not permitted to be broadcast (e.g., Transmit Status) is sent to the broadcast address 11111.
    Indicates that the SSRT received one or more words containing one or more of the following error
    types: sync field error, Manchester encoding error, parity error, and/or bit count error.
    This bit is set if the SSRT is the receiving RT for an RT-to-RT transfer and one or more of the follow-
    ing errors occurs: (1) If the transmitting RT responds with a response time of less than 4 s, per MIL-
    STD-1553B (mid-parity bit to mid-sync); i.e., less than 2 s dead time; and/or (2) There is an incorrect
    sync type or format error (encoding, bit count, and/or parity error) in the transmitting RT Status Word;
    and/or (3) The RT address field of the transmitting RT Status Word does not match the RT address in
    the transmit Command Word.
    If the SSRT is the receiving RT for an RT-to-RT transfer, if this bit is set, it indicates one or more of
    the following error conditions in the transmit Command Word: (1) T/R bit = logic "0"; (2) subaddress =
    00000 or 11111; (3) same RT Address field as the receive Command Word.
    If set, indicates that the SSRT detected a Command sync in a received Data Word.
    Set to logic "1" if the previous message had a low word count error.
    RT-RT TRANSFER
    NO RESPONSE
    TIMEOUT
    COMMAND WORD
    CONTENTS ERROR
    INVALID WORD
    MANCHESTER/PARITY
    ERROR RECEIVED
    RT-RT TRANSFER RESPONSE
    ERROR (no gap, data, sync,
    address mismatch)
    RT-RT TRANSFER -
    T/R ERROR ON
    SECOND COMMAND
    OR
    INVALID ADDRESS
    INCORRECT SYNC TYPE
    RECEIVED
    LOW WORD COUNT
    2
    0 (LSB)
    4
    3
    1
    5
    6
    Set to logic "1" if the previous message had a high word count error.
    HIGH WORD COUNT
    7
    Set to logic "1" to denote that the SSRT has failed its off-line protocol self-test. This bit will be logic
    "0" if the self-test passed or had not been performed.
    BIT TEST FAIL
    8
    Set to logic "1" if the SSRT's Terminal flag RT status bit has been disabled by an Inhibit terminal flag
    mode code command. Will revert to logic "0" if an Override inhibit terminal flag mode code command
    is received.
    TERMINAL FLAG INHIBITED
    9
    If this bit is set, it indicates that the subsystem had failed to respond with the DMA handshake input
    DTGRT asserted within 10 s after the SSRT has asserted DTREQ.
    HANDSHAKE FAILURE
    12
    A loopback test is performed on the transmitted portion of every non-broadcast message. A validity
    check is performed on the received version of every word transmitted by the SSRT. In addition, a bit-
    by-bit comparison is performed on the last word transmitted by the RT for each message. If either the
    received version of the last word does not match the transmitted version and/or the received version
    of any transmitted word is determined to be invalid (sync, encoding, bit count, parity), or a failsafe
    timeout occurs on the respective channel, the LOOP TEST FAILURE bit for the respective bus chan-
    nel will be set.
    CH. B LOOP TEST FAILURE
    CH. A LOOP TEST FAILURE
    14
    13
    Set if the SSRT's failsafe timer detected a fault condition. The transmitter timeout circuit will automati-
    cally shut down the CH. A or CH. B transmitter if it transmits for longer than 660.5 s.
    TRANSMITTER TIMEOUT
    15
    (MSB)
    TABLE 5. INTERNAL BUILT-IN-TEST (BIT) WORD DEFINITION
    DESCRIPTION
    FUNCTION
    BIT
    If either of these bits are logic "1", this indicates that the respective 1553 transmitter has been shut
    down by means of a Transmitter shutdown mode command.
    TRANSMITTER SHUTDOWN B
    TRANSMITTER SHUTDOWN A
    11
    10
    Note:
    Bits 15 through 9 are cleared only following a RESET input or receipt of a Reset Remote Terminal mode command. Bits 8 through 0 are updated
    as a result of every message processed.
    
    
    
    
    
    


    


    

    相關(guān)PDF資料
    		

    PDF描述
    		

    
    

    
BU-61703F4-190Q
2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72

    

    
BU-61703F4-190Y
2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72

    

    
BU-61703G3-110L
2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72

    

    
BU-61703G3-110Q
2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72

    

    
BU-61703G3-112W
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-61705
 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MIL-STD-1553 Components |Simple System RT

    

    
BU-61740B3NEW
 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MIL-STD-1553 Components |μ-ACE (Micro-ACE?)

    

    
BU-61743
 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MIL-STD-1553 Components |Enhanced Mini-ACE?

    

    
BU-61743F3-100
 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC

    

    
BU-61743F3-110
 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC

    

    
    
    
    
	
    	
    
    
     
     
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