Chapter 2

Serial Port Connector: COM A & COM B

The mainboard offers two 9-pin male DIN connectors for serial port COM A and COM B. The ports are 16550A high speed communication ports that send/receive 16 bytes FIFOs. You can attach a serial mouse or other serial devices directly to them.

 

 

Pin Definition

1 2 3 4 5

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)

6 7 8 9

5

GND

Ground

6

DSR

Data Set Ready

9-Pin Male DIN Connectors

7

RTS

Request To Send

8

CTS

Clear To Send

 

 

9

RI

Ring Indicate

Joystick/Midi Connectors

You can connect a joystick or game pad to this connector.

Audio Port Connectors

Line Out is a connector for Speakers or Headphones. Line In is used for external CD player, Tape player, or other audio devices. Mic is a connector for microphones.

1/8” Stereo Audio Connectors

Line Out Line In MIC

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Image 22
Microstar G52-MA00514 manual Serial Port Connector COM a & COM B, Joystick/Midi Connectors, Audio Port Connectors