User`s manual

2-6 Chapter 2
(4). SMB1: System Management Bus Header
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.
(5). JP1: Thermal Sensor Header
This header is a thermal sensor connector used for detecting the system environmental temperature. It
may also be called a system temperature detector. You can attach one end of a two-threaded thermal cable
to this header, and attach the other end of the thermal cable onto any heat source, such as VGA chipset’s
heatsink, or Hard Disk Drive.
IT7-MAX2