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OCPRF100 MP Server System Technical Product Specification
Revision 1.0
131
Figure 10-2: Devices Not Supporting Multimaster Mode
10.2.12.2 Global I
2
C Bus
The global I
2
C bus is connected automatically to the IPMB whenever power is valid. This bus is
used to allow communication between smart I
2
C devices that operate in multimaster mode. Spe-
FPC MPU
80651
Temp Monitor DS1621*
I2C Address: 90h / 91h
I/O Expender PCF8574*
I2C Address: 40h /41h
EEPROM (FRU) AT24C02*
I2C Address: A0h / A1h
I/O Expender PCF8574
I2C Address: 42h / 43h
Front Panel Board
Midplane Board
I2C
I2C
I2C
I2C
I2C
OCPRF100
FPC Private I2C Bus Diagram
EEPROM (FRU) AT24C02
I2C Address: AAh / ABh
EEPROM (FRU) AT24C02
I2C Address: ACh / ADh
EEPROM (FRU) AT24C02
I2C Address: AEh / AFh
EEPROM (FRU) AT24C02
I2C Address: A2h / A3h
Inside
Power Supply 1
Inside
Power Supply 3
Inside
Power Supply 2
I2C