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参数资料
型号： DS3120N
厂商： Maxim Integrated Products
文件页数： 77/133页
文件大小： 0K
描述： IC FRAMER T1 28-CHANNEL IND
标准包装： 1
控制器类型： T1 调帧器
接口： 并行/串行
电源电压： 2.97 V ~ 3.63 V
电流 - 电源： 300mA
工作温度： -40°C ~ 85°C
安装类型： 表面贴装
封装/外壳： 316-BGA
包装： 管件
DS3112
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5
T3/E3 FRAMER
On the receive side, the T3/E3 framer locates the frame boundaries of the incoming T3 or E3 data stream
and monitors the data stream 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 (Section 5.4). The host can force the T3/E3 framer to
resynchronize via the T3E3RSY control bit in the MRID register (Section 4.1). On the transmit side, the
device formats the outgoing data stream with the proper framing pattern and overhead and can generate
alarms. It can also inject errors for diagnostic testing purposes (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 (Section 4.2).
5.1 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.
5.2 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.
5.3 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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DS31256+ 功能描述:输入/输出控制器接口集成电路 256Ch High Thruput HDLC Cntlr RoHS:否 制造商:Silicon Labs 产品: 输入/输出端数量: 工作电源电压: 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-64 封装:Tray
DS31256B 功能描述:输入/输出控制器接口集成电路 256Ch High Thruput HDLC Cntlr RoHS:否 制造商:Silicon Labs 产品: 输入/输出端数量: 工作电源电压: 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-64 封装:Tray
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