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    參數(shù)資料
    型號: XRT86VL34IB-F
    廠商: Exar Corporation
    文件頁數(shù): 41/155頁
    文件大?。?/td> 0K
    描述: IC LIU/FRAMER T1/E1/J1 4CH 225BG
    標準包裝: 84
    控制器類型: T1/E1/J1 調(diào)幀器,LIU
    電源電壓: 3.3V
    工作溫度: -40°C ~ 85°C
    安裝類型: 表面貼裝
    封裝/外殼: 225-BGA
    供應商設備封裝: 225-BGA(19x19)
    包裝: 托盤
    XRT86VL34
    130
    REV. V1.2.1
    QUAD T1/E1/J1 FRAMER/LIU COMBO - T1 REGISTER DESCRIPTION
    3
    TXON_n
    R/W
    0
    Transmitter ON:
    This bit permits the user to either turn on or turn off the Transmit
    Driver of XRT86VL34. If the user turns on the Transmit Driver, then
    XRT86VL34 will begin to transmit T1 data (on the line) via the TTIP
    and TRING output pins.
    Conversely, if the user turns off the Transmit Driver, then the TTIP
    and TRING output pins will be tri-stated.
    0 = Shuts off the Transmit Driver associated with the XRT86VL34
    device and tri-states the TTIP and TRING output pins.
    1 = Turns on the Transmit Driver associated with the XRT86VL34
    device.
    NOTE: If the user wishes to exercise software control over the state
    of the Transmit Driver of the XRT86VL34, then it is
    imperative that the user pull the TxON pin to a logic “HIGH”
    level.
    2-0
    LOOP2_n
    R/W
    000
    Loop-Back control [2:0]:
    These bits control the Loop-Back Modes of the LIU section, accord-
    ing to the table below.
    TABLE 109: LIU CHANNEL CONTROL REGISTER 2 (LIUCCR2)
    HEX ADDRESS: 0X0FN2
    BIT
    FUNCTION
    TYPE
    DEFAULT
    DESCRIPTION-OPERATION
    LOOP2
    0
    1
    LOOP1
    X
    0
    1
    LOOP0
    X
    0
    1
    0
    1
    Loop-Back Mode
    No Loop-Back
    Dual Loop-Back
    Analog Loop-Back
    Remote Loop-Back
    Digital Loop-Back
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