User`s manual

MANO831 Mini ITX Board
14 Board and Pin Assignments
2.3.4 ATX Power Connector (ATX12V)
This connector is for ATX power supply plug. The power supply plug is designed to fit
this connector in only one orientation. Find the proper orientation and push down firmly
until the connector completely fit.
Note
 Use of a PSU with a higher power output is recommended when
configuring a system with more power-consuming devices. The
system may become unstable or may not boot up if the power is
inadequate.
 Make sure that your power supply unit (PSU) can provide at least the
minimum power required by your system.
2.3.5 Serial Connectors (COM3 and COM4)
These connectors are for serial (COM) ports. Connect the serial port module cable to
this connector, then install the module to a slot opening at the back of the system
chassis.
COM3, COM4
Pin
Signal
Pin
Signal
1
GND
3
+12V
2
GND
4
+12V
Pin
Signal
1
DDCD2#
2
RRXD2
3
TTXD2
4
DDTR2#
5
GND
6
DDSR2#
7
RRTS2#
8
CCTS2#
9
RRI2
1
1