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参数资料
| 型号： | DS3112N |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | Digital Transmission Controller |
| 英文描述： | DATACOM, FRAMER, PBGA256 |
| 封装： | 27 X 27 MM, PLASTIC, BGA-256 |
| 文件页数： | 77/134页 |
| 文件大小： | 900K |
| 代理商： | DS3112N |
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DS3112
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SECTION 5: T3 / E3 FRAMER
5.1 GENERAL DESCRIPTION
On the receive side, the T3/E3 framer locates the frame boundaries of the incoming T3 or E3 datastream
and monitors the datastream for alarms and errors. Alarms are detected and reported in T3/E3 Status
Register (T3E3SR) and the T3/E3 Information Register (T3E3INFO) which are described in Section 5.3.
Errors are accumulated in a set of error counters (see Section 5.4). The Host can force the T3/E3 framer
to resynchronize via the T3E3RSY control bit in the MRID register (see Section 4.1). On the transmit
side, the device formats the outgoing datastream with the proper framing pattern and overhead and can
generate alarms. It can also inject errors for diagnostic testing purposes (see the T3E3EIC register). The
transmit side of the framer is called the “formatter”.
The T3/E3 framer and formatter can be used in conjunction with the multiplexer or as a stand alone
framer. This selection is made in the Master Configuration 1 (MC1) register (see Section 4.2).
T3/E3 Line Loopback
The Line Loopback loops the incoming T3/E3 data (the HRCLK, HRPOS, and HRNEG inputs) directly
back to the transmit side (the HTCLK, HTPOS, and HTNEG outputs). When this loopback is enabled,
the incoming receive data continues to pass through the device but the data output from the T3/E3
formatter is replaced with the data being input to the device. See the Block Diagrams in Section 1 for a
visual description of this loopback.
T3/E3 Diagnostic Loopback
The Diagnostic Loopback loops the outgoing T3/E3 data from the T3/E3 formatter back to receive side
framer. When this loopback is enabled, the incoming receive data at HRCLK, HRPOS, and HRNEG is
ignored. See the Block Diagrams in Section 1 for a visual description of this loopback. Please note that
the device can still generate AIS at the HTCLK, HTPOS, and HTNEG outputs when this loopback is
invoked. This is important to keep the data that is being looped back from disturbing downstream
equipment.
T3/E3 Payload Loopback
The Payload Loopback loops the framed T3/E3 data from the receive side framer back to the transmit
side formatter. When this loopback is enabled, the incoming receive data continues to pass through the
device but the data normally being input to the T3/E3 formatter is ignored. See the Block Diagrams in
Section 1 for a visual description of this loopback.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS3112N+ | 功能描述:网络控制器与处理器 IC TEMPE T3/E3 MUX FRMR & M13/E13/G.747 MUX RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS3112N+W | 功能描述:网络控制器与处理器 IC TEMPE T3/E3 MUX FRMR & M13/E13/G.747 MUX RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS3112NC1 | 制造商:Maxim Integrated Products 功能描述:T3 E3 MULTIPLEXER, 3.3V T3/E3 FRAMER AND M13/E13/G.747 MUX - Rail/Tube |
| DS3112ND1E | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS3112RD | 功能描述:网络控制器与处理器 IC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
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