MSI MS-9802 - Serial Port Connector: COM3, COM4; Front USB Connector: F_USB1

4-13
Hardware Setup
Serial Port Connector: COM3, COM4
The mainboard provides two 9-pin headers as serial ports. These ports are 16550A
high speed communication port that sends/receives 16 bytes FIFOs. You can attach
a serial mouse or other serial devices directly to them.
PIN SIGNAL DESCRIPTION
1 DCD Data Carry Detect
2 SIN Serial In or Receive Data
3 SOUT Serial Out or Transmit Data
4 DTR Data Terminal Ready
5 GND Ground
6 DSR Data Set Ready
7 RTS Request To Send
8 CTS Clear To Send
9 VCC_COM3 Power Source
Pin Definition
Front USB Connector: F_USB1
The mainboard provides one USB 2.0 pinheader that is compliant with Intel
®
I/O
Connectivity Design Guide. USB 2.0 technology increases data transfer rate up to a
maximum throughput of 480Mbps, which is 40 times faster than USB 1.1, and is ideal
for connecting high-speed USB interface peripherals such as USB HDD, digital
cameras, MP3 players, printers, modems and the like.
F_USB1
1
2
10
9
PIN SIGNAL PIN SIGNAL
1 VCC 2 VCC
3 USB0- 4 USB1-
5 USB0+ 6 USB1+
7 GND 8 GND
9 Key (no pin) 10 USBOC
Pin Definition
Important
Note that the pins of VCC and GND must be connected correctly to avoid
possible damage.
COM4
1
9
2
8
COM3
1
9
2
8