TI = ‘1, and resetting the device.

GD82559ER — Networkin g Silicon

5.5TriState

This command set all 82559ER Input and Output pins into a TRI-state (HIGH-Z) mode, all internal pull-ups and pull-downs are disabled. This mode is entered by setting the following Test Pin Com- binations: TEST = ‘1, TCK = ‘0, TEXEC = ‘0,

5.6Nand - Tree

The NAND-Tree test mode is the most useful of the asynchronous test modes. The test enables the placement of the 82559ER to be validated at board test. NAND-Tree was chosen for its speed advantages. Modern automated test equipment can complete a complete peripheral scan without support at the board level. This command connects all the outputs of the input-buffers in the device periphery into a NAND - tree scheme. All the output drivers of the output-buffers except the TOUT pin, are put into HIGH-Z mode. These pins can then be driven to affect the output of the tree. There are two separate chains and associated outputs for speed. Any hard strapped pins will prevent the tester from scanning correctly. This mode is enter by placing the Test Pin in the following Combi- nations: TEST = ‘1, TCK = ‘0, TEXEC = ‘1, TI = ‘0

There are two nand-tree chains with two separate outputs assigned to FLOE# (Chain 1) and FLWE# (Chain 2).

Table 2. Nand - Tree Chains

Chain Order

Chain 1

Chain 2

 

 

 

 

 

 

1

RST#

LILED

 

 

 

2

IDSEL

ACTLED#

 

 

 

3

REQ#

SPEEDLED

 

 

 

4

AD23

ISOLATE#

 

 

 

5

SERR#

ALTRST#

 

 

 

6

AD22

CLKRUN#

 

 

 

7

AD21

AD31

 

 

 

8

AD20

AD30

 

 

 

9

AD19

AD29

 

 

 

10

AD18

AD28

 

 

 

11

AD17

AD27

 

 

 

12

C/BE2#

PME#

 

 

 

13

FRAME#

AD26

 

 

 

14

IRDY#

AD25

 

 

 

15

TRDY#

C/BE3#

 

 

 

16

CLK

AD24

 

 

 

17

DEVSEL#

FLD0

 

 

 

18

INTA#

FLD1

 

 

 

 

 

 

NAND-Tree Output

FLOE#

FLWE#

 

 

 

34

Datasheet

Page 40
Image 40
Intel GD82559ER manual TriState, Nand Tree Chains, Chain Order

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.