參數(shù)資料
型號： IDT82P2821BH
廠商： IDT, Integrated Device Technology Inc
文件頁數(shù)： 107/151頁
文件大?。?/td> 0K
描述： IC LIU T1/J1/E1 21+1CH 640-PBGA
標(biāo)準(zhǔn)包裝： 5
功能： 線路接口單元（LIU）
接口： E1，J1，T1
電路數(shù)： 1
電源電壓： 1.8V, 3.3V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 640-BGA 裸露焊盤
供應(yīng)商設(shè)備封裝： 640-PBGA-EP（31x31）
包裝： 托盤
包括： 缺陷和警報檢測，驅(qū)動器過流檢測和保護(hù)，LLOS 檢測，PRBSARB / IB 檢測和生成
其它名稱： 82P2821BH
IDT82P2821
21(+1) CHANNEL HIGH-DENSITY T1/E1/J1 LINE INTERFACE UNIT
Functional Description
59
February 6, 2009
3.5.9
CHANNEL 0 MONITORING
Channel 0 is a special channel. It can be used in normal operation as
the other 21 channels, or it can be used as a monitoring channel.
Channel 0 supports G.772 Monitoring and Jitter Measurement.
3.5.9.1 G.772 Monitoring
Selected by the MON[5:0] bits (b5~0, MON), any receiver or trans-
mitter of the other 21 channels can be monitored by channel 0 (as
shown in Figure-37).
When the G.772 Monitoring is implemented (the MON[5:0] bits
(b5~0, MON) is not ‘0’), the registers of the receiver of channel 0 should
be the same as those of the selected receiver /transmitter except the
line interface related registers.
Once the G.772 Monitoring is implemented, the receiver of channel 0
switches to External Impedance Matching mode automatically, and the
setting in the R_TERM[2:0] bits (b2~0, RCF0,...) of channel 0 is ignored.
During the G.772 Monitoring, channel 0 processes as normal after
data is received from the selected path and the operation of the moni-
tored path is not effected.
The signal which is monitored goes through the Clock & Data
Recovery of monitoring channel (channel 0). The monitored clock can
output on RCLK0. The monitored data can be observed digitally on the
output pin of RCLK0, RD0/RDP0 and RDN0. LOS detector is still in use
in channel 0 for the monitored signal.
In monitoring mode, channel 0 can be configured to Remote Loop-
back. The signal which is being monitored will output on TTIP0 and
TRING0. The output signal can then be connected to a standard test
equipment for non-intrusive monitoring.
Figure-37 G.772 Monitoring
RDN0/RMF0
RCLK0/RMF0
RTIP0
RRING0
TCLK0/TDN0
TDN0/TMF0
TD0/TDP0
RDn/RDPn
RDNn/RMFn
RCLKn/RMFn
RTIPn
RRINGn
TCLKn/TDNn
TDNn/TMFn
TDn/TDPn
CH 0
G.772 Monitoring
TTIPn
TRINGn
TTIP0
TRING0
RD0/RDP0
Any of the
Remaining Channels
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