MARVELL 88E8040-NNC1 Ethernet Controller: A Comprehensive Overview
The MARVELL 88E8040-NNC1 is a highly integrated, single-port Fast Ethernet controller designed to provide a robust and cost-effective networking solution for a wide range of computing platforms. Manufactured by Marvell Semiconductor, a leader in data infrastructure technology, this controller combines advanced features with low power consumption, making it suitable for desktop PCs, embedded systems, and various network appliances.
Architecture and Core Features
At its heart, the 88E8040-NNC1 leverages a highly integrated mixed-signal CMOS design, which efficiently incorporates the physical layer (PHY) functions and media access control (MAC) layer onto a single chip. This integration simplifies board design, reduces the bill of materials (BOM), and enhances overall reliability.
A key feature of this controller is its support for multiple interface types to connect to the system's southbridge or host CPU. It natively supports the Industry-standard PCI bus interface, ensuring broad compatibility with a vast array of computing hardware. The controller is designed for full-duplex operation on both 10BASE-T and 100BASE-TX networks, adhering to the IEEE 802.3u standard. It incorporates sophisticated Adaptive On-Chip Line Equalization and Baseline Wander Correction circuitry, which are critical for maintaining signal integrity and ensuring a stable connection over standard Category 5 unshielded twisted-pair (UTP) cabling.
Power Management and Efficiency
The 88E8040-NNC1 is engineered with power-sensitive applications in mind. It supports Advanced Configuration and Power Interface (ACPI) power management capabilities, including modern sleep states like D0-D3. This allows systems to achieve significant power savings during periods of inactivity, which is crucial for meeting modern energy efficiency standards. The controller also features Wake-on-LAN (WOL) functionality, enabling a powered-down computer to be awakened remotely by a network message, a vital tool for network administrators.
Technical Specifications Summary
Interface: 32-bit PCI v2.2
Data Rate: 10/100 Mbps, Auto-Negotiation
Compliance: IEEE 802.3, 802.3u
Cable Media: Category 3, 4, 5 UTP (up to 100 meters)
Advanced Features: VLAN tagging support, jumbo frames, and quality of service (QoS) packet prioritization.
Packaging: Typically offered in a 128-pin LQFP or TQFP package.
The Marvell 88E8040-NNC1 stands as a testament to the era of highly integrated, value-driven Ethernet controllers. Its combination of a single-chip MAC/PHY design, comprehensive power management, and robust interoperability made it a popular and reliable choice for designers seeking a proven Fast Ethernet solution for a multitude of connected devices.
Keywords:
1. Fast Ethernet Controller
2. PCI Interface
3. Single-Chip MAC/PHY
4. Power Management
5. Wake-on-LAN (WOL)
