Intel GD82559ER, Datasheet

Page: 53 / 94

Datasheet 47
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.
7.1 LAN (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 .
7.1.1 PCI 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
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