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Intel® Server Board Set SE8500HW4 Server Management
Revision 1.0
Intel order number D22893-001
29
5.1 Sahalee Baseboard Management Controller (BMC)
The Sahalee Baseboard Management Controller (BMC) contains a 32-bit RISC processor and
associated peripherals used to monitor the system for critical events. The Sahalee BMC is
designed to be the central server management controller in an enterprise server system and is
common to several Intel
®
Architecture 32-bit-based and Intel Itanium™ Processor-based
platform implementations. The Sahalee BMC contains the logic needed for executing the
firmware, controlling the system, monitoring sensors, and communicating with other systems
and devices via various external interfaces.
The Sahalee BMC resides on an Intel
®
Management Module (IMM) that mounts onto the Intel
®
Server Board Set SE8500HW4 Mainboard. Either an IMM Professional or IMM Advanced is
required to boot and use the Intel
®
Server Board Set SE8500HW4. See the Intel
®
Management
Module Installation and User’s Guide for a description of these parts.
Figure 8 shows the I
2
C block diagram for Intel
®
Server Board Set SE8500HW4 and both the
Intel
®
Server Platform SR4850HW4 and Intel
®
Server Platform SR6850HW4.
Addr: 84
LM75
Addr: 98
FRU
Addr: A6
I2C_IO_SDA
I2C_IO_SCL
Addr: 18 Addr: C2 Addr: C0
Addr: AA
LM93
Addr: 58
PCI Slots
Debug
Header
ROMB
DIMM
Addr: AE
Clock
Synth
Addr: D2
Temp
Addr: 90
Addr: C0
FRU
Addr: A0
I2C(0)
FML
I2C(5)
I2C(2)
I2C(3)
I2C(1)
I2C(4)
IO EXP
PCA9555
Addr: 40
I
2
C
_
F
M
L
_
S
D
A
I
2
C
_
F
M
L
_
S
C
L
LM93
Addr: 5C
LM75
Addr: 90
AT24C128
FRU
Addr: A0
IPMB
HDR
I2C_CS_SDA
I2C_CS_SCL
PIROM
I2C_CPU_SDA
I2C_CPU_SCL
FRU
Addr: A4
Temp
FRU
Addr: AA
IO EXP
PCA9555
Addr: 42
System Type,
Fan presence,
Fan fail LEDs
CPU PIROM TEMP
------ --------- --------
1 A4 98
2 A6 9C
3 A0 34
4 A2 30
ICH5_SMBDAT
ICH5_SMBCLK
IO EXP
PCA9555
Addr: 48
LT
I2C_IPMB_SDA
I2C_IPMB_SCL
I2C_SEG2_SDA
I2C_SEG2_SCL
I2C_IPMB_SDA
I2C_IPMB_SCL
SMBUS
ICH5
IMI AIMI B
IMI C IMI D
USB HUB
SMSC
USB20H04D
Addr: 5A
INTEL
LCD Module
Addr: XX
I2C_PCI_SDA
I2C_PCI_SCL
Temp
Addr: 90
Addr: C0
FRU
Addr: A0
IO EXP
PCA9555
Addr: 42
Addr: C2
INTEL
LCD Module
Addr: XX
USB HUB
SMSC
USB20H04D
Addr: 5A
System Type,
Fan presence,
Fan fail LEDs
Temp
Addr: 90
Addr: AA & 86
I
2
C
_
N
I
C
_
S
D
A
I
2
C
_
N
I
C
_
S
C
L
TEMP
Addr: 34
FRU
Addr: A6
TEMP
Addr: 9C
FRU
Addr: A0
TEMP
Addr: 30
FRU
Addr: A2
TEMP
Addr: 98
Addr: 40
Figure 8. I
2
C Block Diagram