Pc-concepts SHG2 DP User Manual download pdf (Page 45)

Intel® SHG2 DP Server Board Technical Product Specification Server Management

Revision 1.0 Intel Order Number C11343-001

5.3 Intelligent Platform Management Buses

Management controllers (and sensors) communicate on the I

C-based IPMB. A bit protocol,

defined by the I

C Bus Specification, and a byte-level protocol, defined by the Intelligent

Platform Management Bus Communications Protocol Specification, provide an independent

interconnect for all devices operating on this I

C bus.

The IPMB extends throughout the server board and system chassis. An added layer in the

protocol supports transactions between multiple servers on inter-chassis I

C bus segments.

Table 20: IPMB Bus Devices

Function Voltage Address Notes

SCSI HSBP-A 5V 0xC0

SCSI HSBP-B 5V 0xC2

Front Panel Connector 5VSB 0x9A

IPMB Connector 3VSB TBD Depends on plug-in card

In addition to the “public” IPMB, the Sahalee BMC also has five private I

C buses that are used

on the baseboard. The Sahalee BMC is the only master on the private buses. The following

tables list all server board connections to the Sahalee BMC private I

C buses.

Table 21. Private I

C* Bus 1 Devices

Function Voltage Address Notes

PCI Slot 1 3VSB TBD Depends on plug-in card

PCI Slot 2 3VSB TBD Depends on plug-in card

PCI Slot 3 3VSB TBD Depends on plug-in card

PCI Slot 4 3VSB TBD Depends on plug-in card

PCI Slot 5 3VSB TBD Depends on plug-in card

PCI Slot 6 3VSB TBD Depends on plug-in card

Table 22: Private I

C* Bus 2 Devices

Function Voltage Address Notes

CMIC-LE 2.5 V 0xC0 North Bridge

CIOB-X2 2.5 V 0xC4 I/O Bridge

CSB5 3.3 V 0xC2 South Bridge

DIMM 1 2.5 V 0xA0 DIMM1A

DIMM 2 2.5 V 0xA2 DIMM1B

DIMM 3 2.5 V 0xA4 DIMM2A

DIMM 4 2.5 V 0xA6 DIMM2B

DIMM 5 2.5 V 0xA8 DIMM3A

DIMM 6 2.5 V 0xAA DIMM3B

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 96 97

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