參數資料
型號： XRT72L73
廠商： Exar Corporation
元件分類： 通信及網絡
英文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁數： 8/105頁
文件大?。?/td> 1307K
代理商： XRT72L73
XRT72L73
THREE CHANNEL, DS3 ATM UNI/CLEAR-CHANNEL FRAMER IC
REV. P1.0.1
á
PRELIMINARY
8
The On-Chip Line Interface Scan Register allows
the user to monitor the state of 3 input pins. The
function of these input pins, when asserted, are
tabulated below.
FEATURES
TRANSMIT AND RECEIVE SECTIONS
UTOPIA I
NTERFACE
B
LOCKS
Compliant with UTOPIA Level 2 Interface Specifica-
tion (e.g., supports Single-PHY or Multi-PHY opera-
tion).
8-bit or 16-bit wide UTOPIA Data Bus operation in
the Transmit and Receive Directions.
The UTOPIA Data Bus runs at clock rates of 25
MHz, 33 MHz and 50 MHz
Supports both Octet-Level and Cell-Level Hand-
shaking between the UNI and the ATM Layer pro-
cessor.
The Transmit UTOPIA Interface block performs par-
ity checking of ATM cell data that is written into it,
by the ATM Layer processor. Will optionally discard
errored cells.
Contains on-chip 16 cell FIFO in the Transmit Direc-
tion (TxFIFO)
The TxFIFO can be configured to operate with
depths of 4, 8, 12 or 16 cells
Contains on-chip 16 cell FIFO in the Receive
Direction (RxFIFO)
RLOOP
Remote Loop-Back Mode Select:
This bit-field, along with LLOOP can be used to configure the XRT73L04 into one of four different Loop-
Back modes.
Setting RLOOP to “1” (with LLOOP = 0) configures the XRT73L04 to operate in the Remote Loop-Back
Mode.
Setting RLOOP to “1” (with LLOOP = 1) configures the XRT73L04 to operate in the “Digital Local Loop-
Back” Mode.
Setting RLOOP to “0” (with LLOOP = 1) configures the XRT73L04 to operate in the “Analog Local
Loop-Back” Mode.
Setting RLOOP to “0” (with LLOOP = 0) configures the XRT73L04 to operate in the “Normal” (No-Loop-
Back) Mode.
LLOOP
Local Loop-Back Mode Select:
This bit-field along with RLOOP can be used to configure the XRT73L04 into one of four different Loop-
Back modes.
Setting LLOOP to “1” (with RLOOP = 0) configures the XRT73L04 to operate in the “Analog Local
Loop-Back” Mode.
Setting LLOOP to “1” (with RLOOP = 1) configures the XRT73L04 to operate in the “Digital Local Loop-
Back” Mode.
Setting LLOOP to “0” (with RLOOP = 0) configures the XRT73L04 to operate in the “Normal” (No-Loop-
Back) Mode.
Setting LLOOP to “0” (with RLOOP = 1) configures the XRT73L04 to operate in the “Remote
Loop-Back” Mode.
Signal Name
Function of Output Pin
S
IGNAL
N
AME
F
UNCTION
OF
I
NPUT
P
IN
IF
ASSERTED
DMO
Indicates that the "Drive Monitor" circuitry within the XRT73L03 has not detected any bipolar signals
within the last 128 ± 32 bit periods.
RLOL
Indicates that the "Clock Recovery" circuit, within the XRT73L03 has lost "lock" with the incoming
DS3 line signal.
RLOS
Indicates that the XRT73L03 is declaring an LOS (Loss of Signal) Condition.
相關PDF資料
PDF描述
XRT72L74 Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
XRT7300IV E3/DS3/STS-1 LINE INTERFACE UNIT
XRT7300 E3/DS3/STS-1 LINE INTERFACE UNIT
XRT7302 2 Channel E3/DS3/STS-1 Line Interface Unit(2通道 E3/DS3/STS-1線接口單元)
XRT73L02M TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
相關代理商/技術參數
參數描述
XRT72L73IB 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC
XRT72L74IB 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC
XRT7300 制造商:EXAR 制造商全稱:EXAR 功能描述:E3/DS3/STS-1 LINE INTERFACE UNIT
XRT7300ES 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)器數量: 數據速率: 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
XRT7300IV 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
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