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Introduction
2 Software Developer’s Manual
For the 82544GC/EI, when connected to an appropriate SerDes, it can alternatively provide an
Ethernet interface for 1000 Base-SX or LX applications (IEEE 802.3z).
Note: The 82546EB/82545EM is SerDes PICMG 2.16 compliant. The 82546GB/82545GM is SerDes
PICMG 3.1 compliant.
82546GB/EB Ethernet controllers also provide features in an integrated dual-port solution
comprised of two distinct MAC/PHY instances. As a result, they appear as multi-function PCI
devices containing two identically-functioning Ethernet controllers. See Section 12 for details.
1.3 Ethernet Controller Features
This section describes the features of the PCI/PCI-X Family of Gigabit Ethernet Controllers.
1.3.1 PCI Features
• 32/64-bit 33/66 MHz, PCI Rev 2.3 and PCI-X 1.0a compliant Host interface (82546GB/
82545GM)
• 32/64-bit 33/66 MHz, PCI Rev 2.2 and PCI-X 1.0a compliant Host interface (82546EB,
82545EM, and 82544GC/EI)
• 32/64-bit 33/66 MHz, PCI Rev 2.3 compliant Host interface (82541xx)
• 32/64-bit 33/66 MHz, PCI Rev 2.2 compliant Host interface (82540EP/EM)
• 64-bit addressing for systems with more than 4 GB of physical memory
• Efficient PCI bus master operation
• Command usage optimization for advanced PCI commands
1.3.2 CSA Features (82547GI/EI Only)
• Uses dedicated port for client LAN controller directly on an MCH device
• High-speed interface with twice the peak bandwidth of a 32-bit 33 MHz PCI bus
• PCI power management registers recognized by the MCH
• Interface only uses 13 signals
1.3.3 Network Side Features
• Auto-Negotiation and Link Setup
— Automatic link configuration including speed, duplex and flow control under IEEE
802.3ab for copper media
— For GMII/MII mode, the driver complies with the IEEE 802.3ab standard requirements
for speed, duplex, and flow control Auto-Negotiation capabilities
• Supports half and full duplex operation at 10 Mb/s and 100 Mb/s speeds while working with
the internal PHY