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2-12 Chapter 2
(8). System Management Bus Header [SMB1]
This header is reserved for system management bus (SM bus). The SM bus is a specific implementation
of an I
2
C bus. I
2
C is a multi-master bus, which means that multiple chips can be connected to the same
bus and each one can act as a master by initiating a data transfer. If more than one master simultaneously
tries to control the bus, an arbitration procedure decides which master gets priority.
(9). Internal Audio Connectors [CD1, AUX1]
These connectors connect to the audio output of internal CD-ROM drive or add-on card.
SI7 Series