Networking Silicon — GD82559ER

will perform Auto-Negotiation or Parallel Detection with no data packets being transmitted. Connection is then established either by FLP exchange or Parallel Detection. The PHY unit will look for both FLPs and link integrity pulses. The following diagram illustrates this process.

Force_Fail

Ability detect either by parallel detect or auto- negotiation.

Parallel Detectio

n

Auto-Negotiatio

n

 

 

 

 

10Base-T or 100Base-TX Link Ready

Look at Link Pulse; Auto-Negotiation capable = 0

FLP capable

Auto-Negotiation capable = 1 Ability Match

LINK PASS

Auto-Negotiation Complete bit set

Figure 15. Auto-Negotiation and Parallel Detect

6.4LED Description

The PHY unit supports three LED pins to indicate link status, network activity and network speed. Each pin can source 10 mA.

Link: This LED is off until a valid link has been detected. After a valid link has been detected, the LED will remain on (active-low).

Activity: This LED blinks on and off when activity is detected on the wire.

Speed: This LED will be on if a 100BASE-TX link is detected and off if a 10BASE-T link is detected. If the link fails while in Auto-Negotiation, this LED will keep the last valid link state. If 100BASE-TX link is forced this LED will be on, regardless of the link status. This LED will be of if the 10BASE-T link is forced, regardless of the link status.

MDI register 27 in Section 9.3.12, “Register 27: PHY Unit Special Control Bit Definitions” on page 71 details the information for LED function mapping and support enhancements.

Figure 16 on page 46 provides possible schematic diagrams for configurations using two and three LEDs.

Datasheet

45

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Intel GD82559ER manual LED Description, Auto-Negotiation and Parallel Detect

GD82559ER specifications

The Intel GD82559ER is a highly regarded network interface controller (NIC) designed for use in various computing environments, primarily for stable connectivity in both desktop and server applications. Released as part of the 82559 family of Ethernet controllers, the GD82559ER features advanced technologies that enhance performance, reliability, and manageability.

One of the standout features of the 82559ER is its ability to support both 10/100 Mbps Ethernet. This dual capability allows the controller to operate in a wide range of network settings, making it adaptable to legacy systems while also providing support for modern Ethernet standards. This versatility is crucial for organizations looking to maintain operational effectiveness without the need for immediate upgrades to their existing infrastructure.

The GD82559ER employs a PCI interface, which allows it to connect with various devices and motherboards easily, making it a go-to choice for manufacturers aiming for integration in their systems. It also includes features like Auto-Negotiation, enabling the NIC to automatically detect and select the appropriate speed and duplex mode for optimal performance. This capability is essential in dynamic networking environments, where devices from various generations coexist.

Power management is another critical aspect of the GD82559ER. The controller supports advanced power-saving features like PCI Power Management, reducing energy consumption during low-usage periods. This not only contributes to lower operational costs but also aligns with modern eco-friendly initiatives in technology.

Additionally, the GD82559ER comes equipped with advanced diagnostics and monitoring capabilities. This enhances the network's manageability by allowing administrators to track performance metrics and diagnose issues effectively. Through its onboard diagnostics, the controller aids in ensuring a stable network connection, allowing for timely interventions when issues arise.

The controller is also designed with a robust architecture that supports various operating systems, facilitating a broad implementation across different platforms. As a result, the GD82559ER has become a reliable option for system builders and enterprises focused on building dependable networking solutions.

Overall, the Intel GD82559ER is a versatile, high-performance network interface controller that continues to serve as a foundational component for computer systems that require efficient, reliable networking capabilities. Its combination of technologies and features makes it a popular choice in diverse computing environments.