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COM Header
The Serial port header (COM1, 2.00mm pitch) can provide one serial port via an
optional COM port cable.
GPIO Header
There is a GPIO (General-purpose input/output) header (2.00mm pitch) on the
motherboard. It can connect a variety of simple one- or two-wire devices.
USB2.0 Header
This mainboard contains one 4-pin onboard header (2.54mm pitch) that can be
used to connect to one (1) external USB 2.0 device.
Case Open Header
This header (2.54mm pitch) is used to for a chassis open detect. When set, the
warning message will appear during POST when the case is opened.
Pin
Definition
1
DCD
2
RXD
3
TXD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI#
10
Empty
Pin
Definition
Pin
Definition
1 SIO3.3V)
2 SIO3.3V_ALW)
3 SIO3.3V)
4 SIO3.3V_ALW)
5 SIO3.3V_ALW)
6 SIO1.8V_ALW)
7 SIO3.3V_ALW)
8 SIO3.3V_ALW)
9 VCC (+3.3V_ALW)
10 GND
Pin
Definition
1
VCC
2
USB0-
3
USB0+
4
GND
Pin
Definition
1
Case Open
2
GND
1
2
Note:
The pin definition of
header and standard DB9
male pin out is different.
1
2
9
10
1
Note: +3.3V_ALW means +3.3V Standby Power.
1
4
