MANO520 Mini ITX Motherboard
Board and Pin Assignments
9
2.3.3
COM1 RS-232/422/485 Mode Select (JP4, JP6, JP7)
These are 3x2-pin (pitch=2.0mm) jumpers for setting COM1 port to operate in RS-232,
RS-422 or RS-485 communication mode.
JP4 JP6 JP7
2.3.4
COM1 Data/Power Select (JP5)
This is a 3x2-pin (pitch=2.0mm) jumper. The COM1 port has +5V power capability on
DCD and +12V on RI by setting JP5.
2.3.5
LVDS Backlight PWM/DC Mode Select (JP8)
This 3-pin (pitch=2.0mm) jumper enables you to select PWM or voltage control mode for
LVDS backlight control header (CN32). These two control modes are for adjusting the
brightness of LVDS panel.
2.3.6
LVDS VDD Select (JP9)
The motherboard supports voltage selection for flat panel displays. Use this 3x2-pin
(pitch=2.54mm) jumper to set up VDD power of the LVDS connector. To prevent
hardware damage, before connecting please make sure that the input voltage of LVDS
panel is correct.
Function
Setting
RS-232 mode
(Default)
JP4 1-2 close
JP6 3-5, 4-6 close
JP7 3-5, 4-6 close
RS-422 mode
JP4 3-4 close
JP6 1-3, 2-4 close
JP7 1-3, 2-4 close
RS-485 mode
JP4 5-6 close
JP6 1-3, 2-4 close
JP7 1-3, 2-4 close
Function
Setting
Power: Set COM1 pin 1 to +5V
1-3 close
Data: Set COM1 pin 1 to DCD (Default)
3-5 close
Power: Set COM1 pin 9 to +12V
2-4 close
Data: Set COM1 pin 9 to RI (Default)
4-6 close
Function
Setting
Controlled by PWM (Default)
1-2 close
Controlled by DC Voltage
2-3 close
Function
Setting
+3.3V (Default)
1-2 close
+5V
3-4 close
+12V
5-6 close
