參數(shù)資料
型號: XRT83VSH316IB
廠商: Exar Corporation
文件頁數(shù): 30/98頁
文件大?。?/td> 0K
描述: IC LIU SH T1/E1/J1 16CH 316STBGA
標準包裝: 60
類型: 線路接口裝置(LIU)
驅(qū)動器/接收器數(shù): 16/16
規(guī)程: T1,E1,J1
電源電壓: 3.14 V ~ 3.47 V
安裝類型: 表面貼裝
封裝/外殼: 316-LBGA
供應(yīng)商設(shè)備封裝: 316-STBGA(21x21)
包裝: 托盤
XRT83VSH316
33
16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.1
4.4
Transmit Diagnostic Pattern Generation
The transmit path has the ability to generate diagnostic patterns to the line side interface on the TTip/TRing
output pins (Single Rail Mode Only). The LIU can generate an All Ones (AIS) or PRBS/QRSS (PRBS) signal.
4.4.1
Line Side AIS (Transmit All Ones)
The XRT83VSH316 has the ability to transmit all ones on a per channel basis by programming the appropriate
channel register. The AIS signal is generated on TTip and TRing.
FIGURE 20. TAOS (TRANSMIT ALL ONES)
4.4.2
ATAOS (Automatic Transmit All Ones)
If ATAOS is selected by programming the appropriate global register, an AMI all ones signal will be transmitted
for each channel that experiences an RLOS condition. If RLOS does not occur, the ATAOS will remain inactive
until an RLOS on a given channel occurs. A simplified block diagram of the ATAOS function is shown in
Figure 21.
FIGURE 21. SIMPLIFIED BLOCK DIAGRAM OF THE ATAOS FUNCTION
4.4.3
Line Side PRBS/QRSS (Pseudo/Quasi Random Bit Sequence)
The XRT83VSH316 can transmit a PRBS/QRSS random sequence to a remote location from the TTip/TRing
output pins. To select PRBS or QRSS, see the register map for programming details. The polynomial is shown
in Table 10.
TABLE 10: RANDOM BIT SEQUENCE POLYNOMIALS
RANDOM PATTERN
T1
E1
QRSS
220 - 1
PRBS
215 - 1
TAOS
11
1
RLOS
ATAOS
TAOS
TTIP
TRING
Tx
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