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| 型号： | DS3148N |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 66/89页 |
| 文件大小： | 0K |
| 描述： | IC 8CH DS3/3 FRAMER 349-BGA |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 控制器类型： | DS3/E3 调帧器 |
| 接口： | LIU |
| 电源电压： | 3.135 V ~ 3.465 V |
| 电流 - 电源： | 640mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 349-BGA 裸露焊盘 |
| 供应商设备封装： | 349-HCBGA（27x27） |
| 包装： | 托盘 |
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DS3146/DS3146/DS31412 6-/8-/12-Channel DS3/E3 Framers
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8.4 Loopback Modes
The loopback modes are selected by setting the LLB, DLB, and/or PLB bits in the MC2 register. See Figure 1-1 for
a visual description of these loopbacks. At reset, none of the loopback modes are activated. PLB and DLB may not
be active at the same time. If LLB and PLB are both active at the same time, then TPOS/TNRZ, TNEG, and TCLK
are sourced from RPOS/RNRZ, RNEG/RLCV, and RCLK while the internal workings of the framer are in PLB
mode.
The line loopback (LLB) mode is used to send the received signal back toward the network. TAIS and TUA1 are
not available during line loopback, but the TPOS/TRNZ and TNEG pins can be forced high and low using the
TPOSH, TPOSI, TNEGH, and TNEGI bits in the MC5 register.
The diagnostic loopback (DLB) mode is used to send the transmitted signal back toward the system through the
receive framer. When the framer is in diagnostic loopback, it can simultaneously transmit AIS to the far end if the
TAIS bit is set in the T3E3CR1 register. The framer supports simultaneous line loopback and diagnostic loopback.
The payload loopback (PLB) mode is used to send the received payload back toward the network with new
overhead inserted. When the framer is in payload loopback, the internal transmit clock is connected to the internal
receive clock, internal transmit data is sourced from internal receive data, and TICLK and TDAT are ignored. The
TDEN and TSOF signals are aligned with the RDEN and RSOF signals, and TOH and TOHEN are still enabled.
The TSOF, TDEN, TOH, and TOHEN signals are timed relative to ROCLK rather than TICLK.
8.5 Transmit Overhead Insertion
The transmit signal can be overwritten at any bit location using the TOH and TOHEN signals. The TSOF signal
marks the start of the transmit frame and is used to determine which bits to overwrite. To overwrite a specific bit in
the DS3 or E3 frame, count the required number of TICLK cycles after the TSOF frame pulse. When the proper
TICLK cycle is reached, assert the TOHEN pin to replace normal transmit data (overhead or payload) with the
value on the TOH pin. One application for the TOH and TOHEN pins is to use some of the unused C bits in DS3 C-
Bit Parity mode for a proprietary communications channel.
During payload loopback, the transmit side is timed from ROCLK rather than TICLK. If the system needs to support
transmit overhead insertion (TOH) during payload loopback (PLB), then TOH and TOHEN must also be timed with
respect to ROCLK. One way to access ROCLK is to set the TCCLK bit in the MC2 register to convert the
TDEN/TGCLK output pin into a constant clock, which is based on ROCLK during payload loopback. TOH and
TOHEN can then be timed with respect to the constant clock on the TDEN/TGCLK pin.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS315 | 制造商:Hubbell Wiring Device-Kellems 功能描述:SWITCH, DECO SER, 3W, 15A 120/277V, BR |
| DS3150 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:3.3V, DS3/E3/STS-1 Line Interface Unit |
| DS3150DK | 功能描述:网络开发工具 DS3150 Dev Kit RoHS:否 制造商:Rabbit Semiconductor 产品:Development Kits 类型:Ethernet to Wi-Fi Bridges 工具用于评估:RCM6600W 数据速率:20 Mbps, 40 Mbps 接口类型:802.11 b/g, Ethernet 工作电源电压:3.3 V |
| DS3150G | 功能描述:IC LIU T3/E3/STS-1 49-BGA RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:25 系列:- 类型:收发器 驱动器/接收器数:2/2 规程:RS232 电源电压:4.5 V ~ 5.5 V 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 供应商设备封装:16-PDIP 包装:管件 |
| DS3150GN | 功能描述:IC LIU T3/E3/STS-1 IND 49-BGA RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:25 系列:- 类型:收发器 驱动器/接收器数:2/2 规程:RS232 电源电压:4.5 V ~ 5.5 V 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 供应商设备封装:16-PDIP 包装:管件 |
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