SCSI Backplane Board | Intel® Server Platform SR6850HW4 TPS |
7.2.4 Server Management Interface
The SCSI Backplane Board supports the following server management features:
Local I2C Interface
-Field Replaceable Unit (FRU)
-Temperature sensor
-Microcontroller interface (Hot Swap Controller)
System I2C Interface
-
-I2C/SM Bus (for fan monitoring)
7.2.4.1Local I2C Bus
The Bus A local I2C bus connects the DS75 (or equivalent) thermal sensor and Atmel* AT24C02N (or equivalent) serial EEPROM (with FRU data) to the microcontroller. This thermal sensor is used by the BMC for the ambient temperature of the system.
7.2.4.2Isolated Global I2C Bus (IPMB)
The global I2C bus connects the controllers to the system. The global I2C bus is isolated from the system until the system PWRGRD reaches the SCSI Backplane Board.
7.2.4.3I2C I/O Bus
The I2C I/O bus connects the Server Board Set SE8500HW4 Mainboard microcontroller to the Server Platform SR6850HW4 Front Panel I/O Board, fan control and the USB hub.
7.2.4.4I2C Addresses
Four I2C devices and their addresses are listed in Table 40 and Table 41. The following I2C devices can be addressed on or through the SCSI Backplane Board:
Hot Swap microcontroller (HSC)
FRU EEPROM
Temperature sensor
Fan controller
Table 40. I2C Local Bus Addresses
Device | Address | Bus/Location | Description |
AT24C02 | 0xA0 | Legacy I2C/SCSI Backplane | Private SCSI Backplane Board Board FRU |
|
| Board Board | EEPROM |
|
|
|
|
DS75 | 0x90 | Legacy I2C /SCSI Backplane | Private SCSI Backplane Board Board |
|
| Board Board | temperature sensor |
|
|
|
|
76 | Revision 1.0 |
| Intel order number |