Datasheet
Functional Description
Intel® Xeon® Processor D-1500 Product Family 55
Datasheet - Volume 1 of 4: Integrated Platform Controller Hub
March 2015
When any of these bits are set, SMI# will be generated. These bits are set regardless of
whether interrupts or SCI is enabled for Hot-Plug events. The SMI# may occur
concurrently with an interrupt or SCI.
3.3 Gigabit Ethernet Controller (B0:D25:F0)
Intel® Xeon® Processor D-1500 Product Family integrates a Gigabit Ethernet (GbE)
controller. The integrated GbE controller is compatible with the Intel
®
Ethernet Network
Connection I127LM/V Platform LAN Connect device. The integrated GbE controller
provides two interfaces for 10/100/1000 Mb/s and manageability operation:
• Based on PCI Express* – A high-speed SerDes interface using PCI Express
electrical signaling at half speed while keeping the custom logical protocol for active
state operation mode.
• System Management Bus (SMBus) SMLink – A low speed connection for low power
state mode for manageability communication only. The frequency of this
connection can be configured to one of three different speeds (100 KHz, 400 KHz
or 1 MHz). At this low power state mode the Ethernet link speed is reduced to
10 Mb/s.
Note: The SMBus Specification Version 2.0 defines a maximum bus frequency of 100 kHz.
Speeds faster than this are not SMBus compliant and are used by Intel to support
higher bandwidth manageability communication in the Sx states.
The Intel Ethernet Network Connection I127LM/V only runs at a speed of 1250 Mb/s,
which is 1/2 of the 2.5 Gb/s PCI Express* frequency. Each of the fixed signal PCI
Express root ports in Intel® Xeon® Processor D-1500 Product Family have the ability
to run at the 1250 Mb/s rate. There is no need to implement a mechanism to detect
that the Platform LAN Device is connected. The port configuration (if any), attached
to the Platform LAN Device, is pre-loaded from the NVM. The selected port adjusts
the transmitter to run at the 1250 Mb/s rate and does not need to be
PCI Express compliant.
Note: PCIe validation tools cannot be used for electrical validation of this interface; however,
PCIe layout rules apply for on-board routing.
The integrated GbE controller operates at full-duplex at all supported speeds or half-
duplex at 10/100 Mb/s. It also adheres to the IEEE 802.3x Flow Control Specification.
Note: GbE operation (1000 Mb/s) is only supported in S0 mode. In Sx modes, SMBus is the
only active bus and is used to support manageability/remote wake-up functionality.
The integrated GbE controller provides a system interface using a PCI Express function.
A full memory-mapped or I/O-mapped interface is provided to the software, along with
DMA mechanisms for high performance data transfer.
The integrated GbE controller features are:
•Network Features
— Compliant with the 1 Gb/s Ethernet 802.3, 802.3u, 802.3z,
802.3ab specifications
— Multi-speed operation: 10/100/1000 Mb/s
— Full-duplex operation at 10/100/1000 Mb/s: Half-duplex at 10/100 Mb/s
— Flow control support compliant with the 802.3X specification as well as the
specific operation of asymmetrical flow control defined by 802.3z