The number of applications requiring Ethernet Connectivity continues to expand. Along with this increased market demand is a change in application requirements. Where single channel Ethernet used to be sufficient, many applications such as wireless remote base stations and industrial networking now require DUAL Port functionality for redundancy or system management.

The DP83849I is a highly reliable, feature rich device perfectly suited for industrial applications enabling Ethernet on the factory floor. The DP83849I features two fully independent 10/100 ports for multi-port applications. NATIONALs unique port switching capability also allows the two ports to be configured to provide fully integrated range extension, media conversion, hardware based failover and port monitoring.

The DP83849I provides optimum flexibility in MPU selection by supporting both MII and RMII interfaces. In additional this device includes a powerful new diagnostics tool to ensure initial network operation and maintenance.

In addition to the TDR scheme, commonly used for detecting faults during installation, NATIONAL's innovative cable diagnostics provides for real time continuous monitoring of the link quality. This allows the system designer to implement a fault prediction mechanism to detect and warn of changing or deteriorating link conditions.

With the DP83849IVS, National Semiconductor continues to build on its Ethernet expertise and leadership position by providing a powerful combination of features and flexibility, easing Ethernet implementation for the system designer.

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• Low-power 3.3V, 0.18μm CMOS technology
• Low power consumption <600mW Typical
• 3.3V MAC Interface
• Auto-MDIX for 10/100 Mb/s
• Energy Detection Mode
• Flexible MII Port Assignment
• Dynamic Integrity Utility
• Dynamic Link Quality Monitoring
• TDR based Cable Diagnostic and Cable Length Detection
• Optimized Latency for Real Time Ethernet Operation
• Reference Clock out
• RMII Rev. 1.2 Interface (configurable)
• SNI Interface (configurable)
• MII Serial Management Interface (MDC and MDIO)
• IEEE 802.3u MII
• IEEE 802.3u Auto-Negotiation and Parallel Detection
• IEEE 802.3u ENDEC, 10BASE-T transceivers and filters
• IEEE 802.3u PCS, 100BASE-TX transceivers and filters
• Integrated ANSI X3.263 compliant TP-PMD physical sub-layer with adaptive equalization and Baseline Wander compensation
• Programmable LED support for Link, 10 /100 Mb/s Mode, Activity, Duplex and Collision Detect
• Single register access for complete PHY status
• 10/100 Mb/s packet BIST (Built in Self Test)
• 80-pin TQFP package (12mm x 12mm)

• Datarate (Mbps)
• 10/100
• Interface type
• MII, RMII, SNI
• Number of ports
• Dual
• Rating
• Catalog
• Features
• Cable diagnostics
• Supply voltage (V)
• 3.3
• IO supply (Typ) (V)
• 3.3
• Operating temperature range (C)
• 0 to 70
• Cable length (m)
• 137

DP83849C的完整型号有：DP83849CVS/NOPB、DP83849CVSX/NOPB，以下是这些产品的关键参数及官网采购报价：

DP83849CVS/NOPB，工作温度：0 to 70，封装：TQFP (PFC)-80，包装数量MPQ：119个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：NIPDAU，TI官网DP83849CVS/NOPB的批量USD价格：3.857（1000+）

DP83849CVSX/NOPB，工作温度：0 to 70，封装：TQFP (PFC)-80，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：NIPDAU，TI官网DP83849CVSX/NOPB的批量USD价格：3.214（1000+）

DP83849IVS-EVK — PHYTER 双路工业温度 10/100 Mb/s 双端口以太网收发器 EVM

DP83849IVS Basic product evaluation and customer demo board

ETHERNET-SW — 以太网 PHY Linux 驱动器和工具

德州仪器 (TI) 以太网物理层收发器 (PHY) Linux 驱动程序支持通过串行管理接口 (MDC/MDIO) 进行通信，以配置和读取 PHY 寄存器。

此 USB-2-MDIO 软件在调试和原型设计期间可实现直接寄存器访问。 此工具支持所有 TI 以太网 PHY。

启用驱动程序支持

使用“make menuconfig”（也可以使用“make xconfig”或“make nconfig”）配置内核

Menuconfig 位置

//更改以下示例中的符号字段以匹配部件号
符号：DP83848_PHY [=y]
类型：tristate
提示：德州仪器 (TI) DP83848 PHY 驱动程序
位置：
(...)

DP83849C IBIS Model

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TINA-TI — 基于 SPICE 的模拟仿真程序

TINA-TI 提供了 SPICE 所有的传统直流、瞬态和频域分析以及更多。TINA 具有广泛的后处理功能，允许您按照希望的方式设置结果的格式。虚拟仪器允许您选择输入波形、探针电路节点电压和波形。TINA 的原理图捕获非常直观 - 真正的“快速入门”。

TINA-TI 安装需要大约 500MB。直接安装，如果想卸载也很容易。我们相信您肯定会爱不释手。

TINA 是德州仪器 (TI) 专有的 DesignSoft 产品。该免费版本具有完整的功能，但不支持完整版 TINA 所提供的某些其他功能。

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