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Internal I/O Connectors
X
Digital I/O
The 8-bit Digital I/O (DIO) connector allows for input/output signals of digital logical states de-
fined by voltage levels.
„ Digital I/O Pin Assignment
Pin
Assignment
1
GND
3
DIO_7
5
DIO_6
7
DIO_5
9
DIO_4
11
DIO_3
13
DIO_2
15
DIO_1
17
DIO_0
19
GND
User's Manual | CS631
19
1
20
2
„ Digital I/O
Pin
Assignment
2
+12V
4
+12V
6
GND
8
+5V
10
+5V
12
GND
14
+5VDU
16
+5VDU
18
GND
20
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Internal I/O Connectors
X
Cooling Fan Connectors
System Fan 1 (left), CPU Fan (right)
System Fan 3
System Fan 2
These fan connectors are used to connect to cooling fans. Cooling fans provide adequate air
circulation throughout the chassis and dissipate heat to prevent overheating of the system
board and components. The 4-pin fan provides PWM to modulate fan speed whereas the 3-pin
fans modulate fan speed via voltage modulation.
BIOS Setting
Configure the Smart Fans in the Advanced menu ("SIO NUVOTON6116D" submenu) of the
BIOS. Refer to chapter 3 for more information.
„ 3-pin Fan Pin Assignment
Pin Assignment
1
Ground
2
Power
3
Sense
Chapter 2
HARDWARE INSTALLATION
1
„ System Fan 1/2/3
1
„ CPU Fan (PWM)
„ 4-pin Fan Pin Assignment
Pin Assignment
1
Ground
2
Power
3
Sense
4
Speed Control
22
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