Dell R710 Computer Hardware User Manual


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Dell™ PowerEdge™ R710 Technical Guidebook
32
Table: Nehalem P-State Projections
C. I
2
C (Inter-Integrated Circuit)
What is I
2
C? A simple bi-directional 2-wire bus for ecient inter-integrated circuit control. All I
2
C-bus
compatible devices incorporate an on-chip interface which allows them to communicate directly with
each other via the I
2
C-bus. This design concept solves the many interfacing problems encountered
when designing digital control circuits. These I
2
C devices perform communication functions between
intelligent control devices (e.g., microcontrollers), general-purpose circuits (e.g., LCD drivers, remote
I/O ports, memories), and application-oriented circuits.
The PowerEdge R710, BIOS accesses the I
2
CthroughtheICH9(IntelI/OControllerHub9).Therearetwo
MUXesonICH9’sI
2
C bus.
•OneMUX(U_ICH_SPD)controlstheDIMMSPDsthroughfoursplitsegments
•TheotherMUX(U_ICH_MAIN)controlstheclockbuers,TOE,USBHubthroughfoursplit
segments.
BIOS controls both the MUXes through the two select lines using GPIO pins.
Clock chip, USB hub, and the front panel EEPROM device addresses are located on the IOH I
2
C bus.
SECTION 10. EMBEDDED NICS / LAN ON MOTHERBOARD (LOM)
A. Overview / Description
Embedded Gigabit Ethernet Controllers with TCP Ooad Engine (TOE) support
TwoembeddedBroadcom5709Cdual-portLANcontrollersareontheR710planarasindependent
GigabitEthernetinterfacedevices.ThefollowinginformationdetailsthefeaturesoftheLANdevices.
•x4PCIExpressGen2capableinterface
•ThePowerEdgeR710operatesthiscontrolleratGen1speed
•IntegratedMACandPHY3072x18Bytecontextmemory
•64KBreceivebuer
•TOE(TCPOoadEngine)
•iSCSIcontroller(enabledthroughanoptionalhardwarekey)
•RDMAcontroller(RNIC)(enabledpost-RTSthroughanoptionalhardwarekey)
•NC-SI(NetworkController-SidebandInterface)connectionformanageability
•Wake-On-LAN(WOL)
•PXE2.0remoteboot
•iSCSIboot
•IPv4andIPv6support
•Baremetaldeploymentsupport
PROC
NUMBER
QDF # FREQUENCY
STANDARD
TDP
LFM TDP P-STATE NOTES
E5540
Q1G2 2.53 80 75 Pmin+7 D-0
X5550
Q1GJ 2.67 95 75 Pmin+8 D-0
X5560
Q1GF 2.80 95 75 Pmin+9 D-0
X5570
Q1G9 2.93 95 75 Pmin+10 D-0
W5580
Q1G6 3.20 130 98 Pmin+12 D-0
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