I C (Inter-Integrated Circuit); Section 10. Embedded Nics / Lan On Motherboard (Lom); Overview / Description - Dell POWEREDGE R710 Series Technical Manualbook

Dell™ PowerEdge™ R710 Technical Guidebook
PROc
qDf #
numbeR
E5540
Q1G2
X5550
Q1GJ
X5560 Q1GF
X5570
Q1G9
W5580 Q1G6
C. I C (Inter-Integrated Circuit)
2
What is I C? A simple bi-directional 2-wire bus for efficient inter-integrated circuit control. All I
2
compatible devices incorporate an on-chip interface which allows them to communicate directly with
each other via the I
when designing digital control circuits. These I
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
MUXes on ICH9's I C bus.
2
• O ne MUX (U_ICH_SPD) controls the DIMM SPDs through four split segments
• T he 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

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.
• x 4 PCI Express Gen2 capable interface
• T he PowerEdge R710 operates this controller at Gen1 speed
• I ntegrated MAC and PHY 3072x18 Byte context memory
• 6 4 KB receive buffer
• T OE (TCP Offload Engine)
• i SCSI controller (enabled through an optional hardware key)
• R DMA controller (RNIC) (enabled post-RTS through an optional hardware key)
• N C-SI (Network Controller-Sideband Interface) connection for manageability
• W ake-On-LAN (WOL)
• P XE 2.0 remote boot
• i SCSI boot
• I Pv4 and IPv6 support
• B are metal deployment support
fRequency
2.53
2.67
2.80
2.93
3.20
Table: Nehalem P-State Projections
C-bus. This design concept solves the many interfacing problems encountered
2
stanDaRD
tDP
80 75
95 75
95 75
95 75
130 98
C devices perform communication functions between
2
C through the ICH9 (Intel I/O Controller Hub 9). There are two
2
lfm tDP P-state
Pmin+7
Pmin+8
Pmin+9
Pmin+10
Pmin+12
nOtes
D-0
D-0
D-0
D-0
D-0
C-bus
2
C bus.
2
32