参数资料
型号: XRT73L06IB-F
厂商: Exar Corporation
文件页数: 37/63页
文件大小: 0K
描述: IC LIU E3/DS3/STS-1 6CH 217BGA
标准包装: 60
类型: 线路接口装置(LIU)
驱动器/接收器数: 6/6
规程: DS3,E3,STS-1
电源电压: 3.135 V ~ 3.465 V
安装类型: 表面贴装
封装/外壳: 217-BBGA
供应商设备封装: 217-BGA(23x23)
包装: 托盘
XRT73L06
REV. 1.0.2
SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
39
5.2
LOOPBACKS
The XRT73L06 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.
5.2.1
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 30. 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.
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 30. ANALOG LOOPBACK
TRing
TTIP
RRing
RTIP
RxPOS
RxNEG
RxClk
TxNEG
TxClk
TxPOS
HDB3/B3ZS
ENCODER
HDB3/B3ZS
DECODER
TIMING
CONTROL
DATA &
CLOCK
RECOVERY
Tx
Rx
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