DFI HU171 - Manual (Page 14)

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14
Chapter 2 Hardware Installation
Chapter 2
Backlight Power Select
1-2 On: +3.3V
(default)
2-3 On: +5V
JP32 is used to select the power level of backlight control: +3.3V (default) or +5V.
Important:
Before powering-on the system, make sure that the power settings of JP32 match the
power specification of backlight control. Selecting the incorrect voltage will seriously
damage the backlight.
COM 1 RS232/Power Select
1-3 (RI), 2-4 (DCD) On:
RS232 (default)
3-5 (+5V), 4-6 (+12V) On:
RS232 with power
JP4 is designed to configure the Serial COM port 1 to pure RS232 or RS232 with power.
1
3
5
2
4
6
2
4
6
1
3
5
2
1 9
COM 1: RS232/422/485
JP32
JP4
1
3
2
1
3
2