Networking Silicon —GD82559ER

3.5PHY Signals

Symbol

Type

Name and Function

 

 

 

 

 

 

X1

A/I

Crystal Input One. X1 and X2 can be driven by an external 3.3 V 25

MHz crystal. Otherwise, X1 may be driven by an external metal-oxide

 

 

semiconductor (MOS) level 25 MHz oscillator when X2 is left floating.

 

 

 

 

 

Crystal Input Two. X1 and X2 can be driven by an external 3.3 V 25

X2

A/O

MHz crystal. Otherwise, X1 may be driven by an external MOS level

 

 

25 MHz oscillator when X2 is left floating.

 

 

 

 

 

Analog Twisted Pair Ethernet Transmit Differential Pair. These

TDP

 

pins transmit the serial bit stream for transmission on the Unshielded

A/O

Twisted Pair (UTP) cable. The current-driven differential driver can be

TDN

two-level (10BASE-T) or three-level (100BASE-TX) signals depending

 

 

 

on the mode of operation. These signals interface directly with an

 

 

isolation transformer.

 

 

 

RDP

 

Analog Twisted Pair Ethernet Receive Differential Pair. These pins

A/I

receive the serial bit stream from the isolation transformer. The bit

RDN

stream can be two-level (10BASE-T) or three-level (100BASE-TX)

 

 

 

signals depending on the mode of operation.

 

 

 

ACTLED#

OUT

Activity LED. The Activity LED pin indicates either transmit or receive

activity. When activity is present, the activity LED is on; when no

 

 

activity is present, the activity LED is off.

 

 

 

LILED#

OUT

Link Integrity LED. The Link Integrity LED pin indicates link integrity.

If the link is valid in either 10 or 100 Mbps, the LED is on; if link is

 

 

invalid, the LED is off.

 

 

 

SPEEDLED#

OUT

Speed LED. The Speed LED pin indicates the speed. The speed LED

will be on at 100 Mbps and off at 10 Mbps.

 

 

 

 

 

 

 

Reference Bias Resistor (100 Mbps). This pin controls the out

RBIAS100

B

envelope of the 82559ERER when transmitting in the 10 Mbps mode

via the use of a pull-down resistor to ground. A value of 619 Ω pull-

 

 

 

 

down resistor is adequate is most applications.

 

 

 

 

 

Reference Bias Resistor (10 Mbps). This pin controls the out

RBIAS10

B

envelope of the 82559ER when transmitting in the 10 Mbps mode via

the use of a pull-down resistor to ground. A value of 549 Ω pull-down

 

 

 

 

resistor is adequate is most applications.

 

 

 

 

 

Voltage Reference. This pin is connected to a 1.25 V ± 1% external

VREF

B

voltage reference generator. To use the internal voltage reference

 

 

source, this pin should be left floating.

 

 

 

NOTE: 619 Ω and 549 Ω for the RBIAS100 and RBIAS10, respectively, are only a recommended values and should be fine tuned for various designs.

Datasheet

11

Page 16 Page 18
Page 17
Image 17
Intel GD82559ER manual PHY Signals
Page 16 Page 18

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.
Top Page Image Contents