参数资料
型号: XRT83SL314IB
厂商: Exar Corporation
文件页数: 20/83页
文件大小: 0K
描述: IC LIU SH T1/E1/J1 14CH 304TBGA
标准包装: 27
类型: 线路接口装置(LIU)
驱动器/接收器数: 14/14
规程: T1,E1,J1
电源电压: 3.135 V ~ 3.465 V
安装类型: 表面贴装
封装/外壳: 304-LBGA
供应商设备封装: 304-TBGA(31x31)
包装: 托盘
xr
XRT83SL314
14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.1
24
2.6.3.4
NLCD (Network Loop Code Detection)
The Network Loop Code Detection can be programmed to detect a Loop-Up, Loop-Down, or Automatic Loop
Code.
If the network loop code detection is programmed for Loop-Up, the NLCD will be set "High" if a
repeating pattern of "00001" occurs for more than 5 seconds.
If the network loop code detection is
programmed for Loop-Down, the NLCD will be set "High" if a repeating pattern of "001" occurs for more than 5
seconds. If the network loop code detection is programmed for automatic loop code, the LIU is configured to
detect a Loop-Up code.
If a Loop-Up code is detected for more than 5 seconds, the XRT83SL314 will
automatically program the channel into a remote loopback mode. The LIU will remain in remote loopback even
if the Loop-Up code disappears. The channel will continue in remote loop back until a Loop-Down code is
detected for more than 5 seconds (or, if the automatic loop code is disabled) and then automatically return to
normal operation with no loop back. The process of the automatic loop code detection is shown in Figure 15.
FIGURE 15. PROCESS BLOCK FOR AUTOMATIC LOOP CODE DETECTION
Automatic Remote
Loopback
Loop-Up
Code for
5 sec?
Yes
No
Loop-Down
Code for
5 sec?
No
Yes
Disable Remote
Loopback
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