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VIA EPIA-M920 User Manual
33
3.3.
COM1 and COM2 Voltage Jumper
The voltage for COM1 and COM2 is controlled by the jumper labeled as “J11”. 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.
Figure 36: 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 32: COM1 and COM2 voltage jumper settings