Dell POWEREDGE R710 User Manual

Page 32

Dell™ PowerEdge™ R710 Technical Guidebook

Table: Nehalem P-State Projections

C. I

C (Inter-Integrated Circuit)

What is I

C? A simple bi-directional 2-wire bus for efficient inter-integrated circuit control. All I

C-bus

compatible devices incorporate an on-chip interface which allows them to communicate directly with

each other via the I

C-bus. This design concept solves the many interfacing problems encountered

when designing digital control circuits. These I

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

C through the ICH9 (Intel I/O Controller Hub 9). There are two

MUXes on ICH9’s I

C bus.

• One MUX (U_ICH_SPD) controls the DIMM SPDs through four split segments

• The other MUX (U_ICH_MAIN) controls the clock buffers, 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

C bus.

sectiOn 10. embeDDeD nics / lan On mOtheRbOaRD (lOm)

a. Overview / Description

Embedded Gigabit Ethernet Controllers with TCP Offload 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 buffer

• TOE (TCP Offload 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

Pmin+7

D-0

X5550

Q1GJ

2.67

Pmin+8

D-0

X5560

Q1GF

2.80

Pmin+9

D-0

X5570

Q1G9

2.93

Pmin+10

D-0

W5580

Q1G6

3.20

130

Pmin+12

D-0