Abit AB-AT7-MAX2, Manual, Page: 44 / 136

Chapter 3
AT7-MAX2
3-10
(3). SMB1: System Management Bus (SM-Bus) Header
This header is reserved for the 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, this 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. You
can connect the devices which utilizes the SM-Bus.
Note: Watch the pin position and the orientation
(4). TCPU1 & TSYS1: Temperature Thermistor
The TCPU1 is used to detect the CPU temperature.
The TSYS1 is used to detect the system
environment temperature. You can see the readings
in the BIOS or in the hardware monitoring
application main screen.