參數(shù)資料
型號(hào): XRT73R06IB-F
廠商: Exar Corporation
文件頁(yè)數(shù): 40/68頁(yè)
文件大?。?/td> 0K
描述: IC LIU E3/DS3/STS-1 6CH 217BGA
標(biāo)準(zhǔn)包裝: 126
類(lèi)型: 線路接口裝置(LIU)
驅(qū)動(dòng)器/接收器數(shù): 6/6
規(guī)程: DS3,E3,STS-1
電源電壓: 3.135 V ~ 3.465 V
安裝類(lèi)型: 表面貼裝
封裝/外殼: 217-BBGA
供應(yīng)商設(shè)備封裝: 217-BGA(23x23)
包裝: 托盤(pán)
á
XRT73R06
SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.0.0
42
6.2
LOOPBACKS
The XRT73R06 offers three loopback modes for diagnostic purposes. The loopback modes are selected via
the RLB_n and LLB_n bits n the Channel control registers select the loopback modes.
6.2.1
ANALOG LOOPBACK
In this mode, the transmitter outputs TTIP_n and TRing_n are internally connected to the receiver inputs
RTIP_n and RRing_n as shown in Figure 31. Data and clock are output at RxClk_n, RxPOS_n and RxNEG_n
pins for the corresponding transceiver. Analog loopback exercises most of the functional blocks of the device
including the jitter attenuator which can be selected in either the transmit or receive path.
NOTES:
1.
In the Analog loopback mode, data is also output via TTIP_n and TRing_n pins.
2.
Signals on the RTIP_n and RRing_n pins are ignored during analog loopback.
FIGURE 31. ANALOG LOOPBACK
TRing
TTIP
RRing
RTIP
RxPOS
RxNEG
RxClk
TxNEG
TxClk
TxPOS
HDB3/B3ZS
ENCODER
HDB3/B3ZS
DECODER
J
ITTE
R
A
T
E
NU
AT
O
R
J
ITTE
R
A
T
E
NU
AT
O
R
TIMING
CONTROL
DATA &
CLOCK
RECOVERY
Tx
Rx
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