WG82578DM S LGY6 Intel, WG82578DM S LGY6 Datasheet - Page 13

• Manufacturer Part Number: WG82578DM S LGY6
• Manufacturer: Intel

Specifications of WG82578DM S LGY6

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Interconnects—82578 GbE PHY
2.2.2
2.3
Note:
2.3.1
2.3.1.1
2.3.1.2
PCIe Operation and Channel Behavior
The 82578 only runs at 1250 Mb/s speed, which is 1/2 of the PCIe Specification v1.1,
2.5 Gb/s PCIe frequency. Each of the PCIe root ports in the Intel
Chipset-integrated MAC have the ability to operate with the 82578. The port
configuration is pre-loaded from the NVM. The selected port adjusts the transmitter to
run at the 1.25 GHz rate and does not need to be PCIe compliant.
Packets transmitted and received over the PCIe interface are full Ethernet packets and
not PCIe transaction/link/physical layer packets.
After the PCIe power-up sequence completes, each transmitter starts transmitting idle
symbols and the receiver acquires synchronization as specified in 802.3z.
SMBus
The 82578 SMBus must only be connected to SMLink0 in the Intel
Chipset. No other device (like an external BMC) can be connected to SMLink0 when the
82578 is connected to the Intel
Overview
SMBus is used as an interface to pass traffic between the 82578 and the Intel
Express Chipset when the system is in a low power state (Sx state). The interface is
also used to enable the Intel
as passing in-band information between them.
The SMBus uses two primary signals: SMB_CLK and SMB_DATA to communicate. Both
of these signals float high with board-level pull-ups.
The SMBus specification has defined various types of message protocols composed of
individual bytes. The message protocols supported by the 82578 are described in the
relevant sections.
For more details about SMBus, see the SMBus specification.
SMBus Channel Behavior
The SMBus specification defines the maximum frequency of the SMBus as 100 KHz.
SMBus Addressing
The 82578’s address is assigned using SMBus ARP protocol. The default SMBus address
is 0xC8.
®
5 Series Express Chipset to configure the 82578 as well
®
5 Series Express Chipset SMLink0.
®
®
5 Series Express
5 Series Express
®
5 Series
6