參數(shù)資料
型號： XRT75R03
廠商： Exar Corporation
英文描述： THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
中文描述： Three頻道E3/DS3/STS-1線路接口單元與抖動衰減器
文件頁數(shù)： 87/92頁
文件大?。?/td> 492K
代理商： XRT75R03
xr
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
XRT75R03
REV. 1.0.7
84
9.0
DIAGNOSTIC FEATURES:
9.1
The XRT75R03 contains an on-chip Pseudo Random Binary Sequence (PRBS) generator and detector for
diagnostic purpose. This feature is only available in Host mode. With the PRBSEN_n bit = “1”, the transmitter
will send out PRBS of 2
23
-1 in E3 rate or 2
15
-1 in STS-1/DS3 rate. At the same time, the receiver PRBS
detector is also enabled. When the correct PRBS pattern is detected by the receiver, the RNEG/LCV pin will go
“Low” to indicate PRBS synchronization has been achieved. When the PRBS detector is not in sync the
PRBSLS bit will be set to “1” and RNEG/LCV pin will go “High”.
With the PRBS mode enabled, the user can also insert a single bit error by toggling “INSPRBS” bit. This is
done by writing a “1” to INSPRBS bit. The receiver at RNEG/LCV pin will pulse “High” for one RxClk cycle for
every bit error detected. Any subsequent single bit error insertion must be done by first writing a “0” to
INSPRBS bit and followed by a “1”.
Figure 25 shows the status of RNEG/LCV pin when the XRT75R03 is configured in PRBS mode.
N
OTE
:
In PRBS mode, the device is forced to operate in Single-Rail Mode.
PRBS Generator and Detector:
9.2
The XRT75R03 offers three loopback modes for diagnostic purposes. In Hardware mode, the loopback modes
are selected via the RLB_n and LLB_n pins. In Host mode, the RLB_n and LLB_n bits n the Channel control
registers select the loopback modes.
9.2.1
ANALOG LOOPBACK:
LOOPBACKS:
1
JA in Tx Path Ch_n
R/W
0
Jitter Attenuator in Transmit/Receive Path Select Bit:
This input pin is used to configure the Jitter Attenuator
(within Channel_n) to operate in either the Transmit or
Receive path, as described below.
0 - Configures the Jitter Attenuator (within Channel_n) to
operate in the Receive Path.
1 - Configures the Jitter Attenuator (within Channel_n) to
operate in the Transmit Path.
0
JA0 Ch_n
R/W
0
Jitter Attenuator Configuration Select Input - Bit 0:
Please see the description for Bit 2 (JA1 Ch_n).
F
IGURE
26. PRBS MODE
B
IT
N
UMBER
N
AME
T
YPE
D
EFAULT
V
ALUE
D
ESCRIPTION
RClk
RNEG/LCV
SYNC LOSS
PRBS SYNC
Single Bit Error
相關PDF資料
PDF描述
XRT75R03IV THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
XRT75R06D SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
XRT75R06DIB SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
XRT75R06 SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
XRT75R06IB SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
相關代理商/技術(shù)參數(shù)
參數(shù)描述
XRT75R03D 制造商:EXAR 制造商全稱:EXAR 功能描述:THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCRONIZER
XRT75R03D_06 制造商:EXAR 制造商全稱:EXAR 功能描述:EXAR DATA SHEET FORMAT TEMPLATES
XRT75R03DES 功能描述:時鐘合成器/抖動清除器 3CH T3/E3/STS1LIU+D 3.3V W/REDUNDANCY RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel
XRT75R03DIV 功能描述:時鐘合成器/抖動清除器 3CHNNEL E3/DS3/STS 1 JITTER ATTENUATOR RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel
XRT75R03DIV-F 功能描述:網(wǎng)絡控制器與處理器 IC 3-Ch E3/DS3/STS-1 RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
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