Intel GD82559ER PCI Configuration Registers, LAN Ethernet PCI Configuration Space, Datasheet

Models: GD82559ER

1 94
Download 94 pages 18.1 Kb
Page 53
Image 53

Networking Silicon — GD82559ER

7.PCI Configuration Registers

The 82559ER acts as both a master and a slave on the PCI bus. As a master, the 82559ER interacts with the system main memory to access data for transmission or deposit received data. As a slave, some 82559ER control structures are accessed by the host CPU to read or write information to the on-chip registers. The CPU also provides the 82559ER with the necessary commands and pointers that allow it to process receive and transmit data.

7.1LAN (Ethernet) PCI Configuration Space

The 82559ER PCI configuration space is configured as 16 Dwords of Type 0 Configuration Space Header, as defined in the PCI Specification, Revision 2.1. A small section is also configured according to its device specific configuration space. The configuration space header is depicted below in Figure 17.

 

Device ID

 

Vendor ID

00H

 

 

 

 

 

 

Status

 

Command

04H

 

 

 

 

 

 

 

 

 

Class Code

 

 

Revision ID

08H

 

 

 

 

 

 

 

BIST

 

Header Type

 

Latency Timer

Cache Line Size

0CH

 

 

 

 

 

 

 

 

CSR Memory Mapped Base Address Register

 

10H

 

 

 

 

 

 

 

CSR I/O Mapped Base Address Register

 

14H

 

 

 

 

 

 

 

Flash Memory Mapped Base Address Register

 

18H

 

 

 

 

 

 

 

Reserved Base Address Register

 

1CH

 

 

 

 

 

 

 

Reserved Base Address Register

 

20H

 

 

 

 

 

 

 

Reserved Base Address Register

 

24H

 

 

 

 

 

 

 

 

 

Reserved

 

28H

 

 

 

 

 

 

 

Subsystem ID

 

Subsystem Vendor ID

2CH

 

 

 

 

 

 

 

 

Expansion ROM Base Address Register

 

30H

 

 

 

 

 

 

 

 

 

Reserved

 

 

Cap_Ptr

34H

 

 

 

 

 

 

 

 

 

Reserved

 

38H

 

 

 

 

 

 

 

Max_Lat

 

Min_Gnt

 

Interrupt Pin

Interrupt Line

3CH

 

 

 

 

 

 

 

 

 

 

 

Power Management Capabilities

 

Next Item Ptr

Capability ID

DCH

 

 

 

 

 

 

 

Reserved

 

Data

 

Power Management CSR

E0H

 

 

 

 

 

 

 

Figure 17. PCI Configuration Registers

7.1.1PCI Vendor ID and Device ID Registers

The Vendor ID and Device ID of the 82559ER are both read only word entities. Their HARD- CODED values are:

Vendor ID: 8086H

Device ID: 1209H

Datasheet

47

Page 53
Image 53
Intel GD82559ER PCI Configuration Registers, LAN Ethernet PCI Configuration Space, PCI Vendor ID and Device ID Registers