IMB202 LGA775 ATX Board User’s Manual
Jumpers and Connectors
12
2.4.1 VGA Connector (CN1)
CN1 is a standard 15-pin pin DB15 connector commonly used for the
CRT VGA display.
Pin
Signal
Pin
Signal
Pin
Signal
1 Red
2
Green
3
Blue
4 N/A
5
GND
6
AGND
7 AGND
8
AGND
9
N/A
10 GND
11
N/A
12
DDC
DAT
13
Horizontal Sync
14
Vertical Sync
15
DDC CLK
2.4.2 Serial Port Interface Connector (CN2)
(RS232/RS422/RS485)
The board
has four onboard serial ports .COM1 is a standard D-Sub 9
pin connector and support RS232 function
CN2
PIN
Number
RS-232
RS-422
RS-485
1
Data Carrier Delect (DCD)
TX-
Data -
2
Receive Date (RXD)
TX+
Data +
3
Transmit Data (TXD)
RX+
NC
4
Data Terminal Ready (DTR)
RX-
NC
5 GND
GND
GND
6
Data Set Ready (DSR)
NC
NC
7
Request to Send (RTS)
NC
NC
8
Clear to Send (CTS)
NC
NC
9
Ring Indicator (RI)
NC
NC
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