1.1 Features 1
• Low-power 3.3-V, 0.18-μm CMOS Technology
• Low power Consumption <600 mW Typical
• 3.3-V 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
• IEEE 1149.1 JTAG
• 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 (12-mm × 12-mm)

1.2 Applications
• Medical Instrumentation
• Factory Automation
• Motor and Motion Control
• Wireless Remote Base Station
• General Embedded Applications

1.3 Description
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. The 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
addition 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, the 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.
The DP83849I 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.