VIA EPIA-M930 User Manual
22
Settings
Pin 1
Pin 2
Pin 3
Regular (default)
Open
Open
Open
Clear CMOS
Short
Short
Open
Clear RTC Register
Open
Short
Short
Table 24: Clear CMOS jumper settings
Note:
Avoid clearing the CMOS while the system is on and system power is connected; it will damage the board.
3.2
COM1 and COM2 Voltage Jumper
The voltage for COM1 and COM2 is controlled by the jumper labeled as “COM_S1”. The voltage can be either
+5V or +12V. +5V is the default setting. The odd pin numbers correspond to COM1. The even pin numbers
correspond to COM2. The jumper settings are shown below.
1
+5V (default)
+12V
1
Figure 28: COM1 and COM2 voltage jumper diagram
COM1 Settings
Pin 1
Pin 3
Pin 5
+5V (default)
Short
Short
Open
+12V
Open
Short
Short
COM2 Settings
Pin 2
Pin 4
Pin 6
+5V (default)
Short
Short
Open
+12V
Open
Short
Short
Table 25: COM1 and COM2 voltage jumper settings
