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參數(shù)資料
| 型號： | XRT73L02 |
| 廠商： | Exar Corporation |
| 英文描述： | 2 Channel E3/DS3/STS-1 Line Interface Unit(2通道 E3/DS3/STS-1線接口單元) |
| 中文描述： | 2頻道E3/DS3/STS-1線路接口單元（2通道E3/DS3/STS-1線接口單元） |
| 文件頁數(shù)： | 56/62頁 |
| 文件大?。?/td> | 716K |
| 代理商： | XRT73L02 |
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XRT73L02
2 CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
REV. P1.1.0
á
PRELIMINARY
52
b. Set this bit-field to "0" if the cable length between
the Cross-Connect and the transmit output of Chan-
nel (n) is less than 225 feet.
N
OTE
:
This bit-field is active only if the XRT73L02 is config-
ured to operate in the DS3 or SONET STS-1 Modes.
If the cable length is greater than 225 feet, set this bit-
field to "1" in order to increase the amplitude of the
Transmit Output Signal. If the cable length is less
than 225 feet, set this bit-field to "0".
N
OTE
:
This option is only available when the XRT73L02 is
operating in the DS3 or STS-1 Mode.
Bit D0 - TxBIN_(n) (Transmit Binary Data - Chan-
nel (n))
This Read/Write bit-field is used to configure the
Channel (n) Transmitter to accept an un-encoded bi-
nary data stream via the TPData input and convert
this data into the appropriate bipolar signal for the
line.
Writing a "1" configures the Transmitter to accept a bi-
nary data stream via the TPData input. The TNData
input is ignored.
This form of data acceptance is sometimes referred
to as Single-Rail mode operation. The Transmitter
then encodes this data into the appropriate line code
(e.g., B3ZS or HDB3) prior to its transmission over
the line.
Writing a "0" configures the Transmitter to accept da-
ta in a Dual-Rail manner via TPData and TNData in-
puts.
5.2.3
Command Register CR2-(n)
The bit-format and default values for Command Reg-
ister CR2-(n) are listed below followed by the function
of each of these bit-fields.
COMMAND REGISTER CR2-(N)
Bit D4 - Reserved
Bit D3 - ENDECDIS (B3ZS/HDB3 Encoder/Decod-
er-Disable - Channel (n))
This Read/Write bit-field is used to enable or disable
the Channel (n) B3ZS/HDB3 Encoder and Decoder
blocks.
Writing a "1" to this bit-field disables the B3ZS/HDB3
Encoder and Decoder blocks. Writing a "0" to this bit-
field enables the B3ZS/HDB3 Encoder and Decoder
blocks.
N
OTE
:
This Encoder/Decoder performs HDB3 Encoding/
Decoding if the XRT73L02 is operating in the E3 Mode.
Otherwise, it performs B3ZS Encoding/Decoding.
Bit D2 - ALOSDIS (Analog LOS Disable - Channel
(n))
This Read/Write bit-field is used to enable or disable
the Channel (n) Analog LOS Detector.
Writing a "0" to this bit-field enables the Analog LOS
Detector. Writing a "1" to this bit-field disables the
Analog LOS Detector.
N
OTE
:
If the Analog LOS Detector is disabled, then the
RLOS input pin is only asserted by the DLOS (Digital LOS
Detector).
Bit D1 - DLOSDIS (Digital LOS Disable - Channel
(n))
This Read/Write bit-field to used to enable or disable
the Channel (n) Digital LOS Detector .
Writing a "0" to this bit-field enables the Digital LOS
Detector. Writing a "1" to this bit-field disables the
Digital LOS Detector.
N
OTE
:
If the Digital LOS Detector is disabled, then the
RLOS input pin is only asserted by the ALOS (Analog LOS
Detector).
Bit D0 - REQEN (Receive Equalization Enable -
Channel (n))
This Read/Write bit-field is used to either enable or
disable the Channel (n) internal Receive Equalizer of
the XRT73L02.
Writing a "1" to this bit-field enables the Internal
Equalizer. Writing a "0" to this bit-field disables the
Internal Equalizer.
5.2.4
Command Register CR3-(n)
The bit-format and default values for Command Reg-
ister CR3 are listed below followed by the function of
these bit-fields.
COMMAND REGISTER CR3-(N)
Bit D4 - SR/DR_(n)(Single-Rail/Dual-Rail Data Out-
put - Channel (n))
This Read/Write bit-field is used to configure Channel
(n) in the XRT73L02 to output the received data from
the Remote Terminal in a binary or Dual-Rail format.
Writing a "1" to this bit-field configures Channel (n) to
output data to the Terminal Equipment in a binary
Single-Rail format via the RPOS_(n) output pin.
D4
D3
D2
D1
D0
Reserved ENDECDIS ALOSDIS
DLOSDIS
REQEN
X
0
0
0
0
D4
D3
D2
D1
D0
SR/DR_(n) LOSMUT_(n) RxOFF_(n) RxClk_(n)INV Reserved
0
1
0
0
0
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|---|---|
| XRT73L03A | 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| XRT73L03AIV | 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| XRT73L03B | 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| XRT73L03BIV | 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| XRT73L02M | 制造商:EXAR 制造商全稱:EXAR 功能描述:TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT |
| XRT73L02MES | 功能描述:網絡控制器與處理器 IC RoHS:否 制造商:Micrel 產品: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 |
| XRT73L02MIV | 制造商:EXAR 制造商全稱:EXAR 功能描述:TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT |
| XRT73L02MIV-F | 功能描述:外圍驅動器與原件 - PCI RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| XRT73L02MIVTR-F | 功能描述:網絡控制器與處理器 IC RoHS:否 制造商:Micrel 產品: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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