参数资料
型号: XRT75L03DIV-F
厂商: Exar Corporation
文件页数: 31/134页
文件大小: 0K
描述: IC LIU E3/DS3/STS-1 3CH 128LQFP
标准包装: 72
类型: 线路接口装置(LIU)
驱动器/接收器数: 3/3
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: 128-LQFP 裸露焊盘
供应商设备封装: 128-LQFP(14x20)
包装: 托盘
XRT75L03D
á
REV. 1.0.0
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
121
If the XRT75L03D has been configured to operate in the Hardware Mode.
Then the user should tie pin 43 (JATx/JARx*) to "1".
e.
Enable the "SONET APS Recovery Time" Mode
Finally, if the user intends to use the XRT75L03D in an Application that is required to reacquire proper SONET
and DS3 traffic, prior within 50ms of an APS (Automatic Protection Switching) event (per Telcordia GR-253-
CORE), then the user should set Bit 4 (SONET APS Recovery Time Disable), within the "Jitter Attenuator
Control" Register, to "0" as depicted below.
NOTES:
1.
The ability to disable the "SONET APS Recovery Time" mode is only available if the XRT75L03D is operating in
the Host Mode. If the XRT75L03D is operating in the "Hardware" Mode, then this "SONET APS Recovery Time
Mode" feature will always be enabled.
2.
The "SONET APS Recovery Time" mode will be discussed in greater detail in “Section 9.8.3, How does the
9.8.2
Recommendations on Pre-Processing the Gapped Clocks (from the Mapper/ASIC Device)
prior to routing this DS3 Clock and Data-Signals to the Transmit Inputs of the XRT75L03D
In order to minimize the effects of "Clock-Gapping" Jitter within the DS3 signal that is ultimately transmitted to
the DS3 Line (or facility), we recommend that some "pre-processing" of the "Data-Signals" and "Clock-Signals"
(which are output from the Mapper device) be implemented prior to routing these signals to the "Transmit
Inputs" of the XRT75L03D.
JITTER ATTENUATOR CONTROL REGISTER - CHANNEL 0 ADDRESS LOCATION = 0X07
CHANNEL 1 ADDRESS LOCATION = 0X0F
CHANNEL 2 ADDRESS LOCATION = 0X17
BIT 7BIT 6BIT 5BIT 4BIT 3BIT 2
BIT 1BIT 0
Unused
SONET APS
Recovery
Time
DisableCh_n
JA RESET
Ch_n
JA1 Ch_n
JA in Tx Path
Ch_n
JA0 Ch_n
R/O
R/W
00
000
0
11
JITTER ATTENUATOR CONTROL REGISTER - CHANNEL 0 ADDRESS LOCATION = 0X07
CHANNEL 1 ADDRESS LOCATION = 0X0F
CHANNEL 2 ADDRESS LOCATION = 0X17
BIT 7BIT 6BIT 5
BIT 4BIT 3BIT 2BIT 1BIT 0
Unused
SONET APS
Recovery
Time
DisableCh_n
JA RESET
Ch_n
JA1 Ch_n
JA in Tx Path
Ch_n
JA0 Ch_n
R/O
R/WR/W
R/W
00
0
00
001
相关PDF资料
PDF描述
XRT75L03IV-F IC LIU E3/DS3/STS-1 3CH 128LQFP
XRT75L04DIV-F IC LIU E3/DS3/STS-1 4CH 176TQFP
XRT75L04IV-F IC LIU E3/DS3/STS-1 4CH 176LQFP
XRT75L06DIB-F IC LIU E3/DS3/STS-1 6CH 217BGA
XRT75L06IB-F IC LIU E3/DS3/STS-1 6CH 217BGA
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