IMB202 LGA775 ATX Board User’s Manual
Jumpers and Connectors
13
2.4.3 Serial Port Interface Connectors (CN11, CN20,
CN28) (RS232)
The serial interface for the board consists of COM2 port (CN11), COM3
(CN20) and COM4 (CN28) supports RS-232.
Connector: COM2 (CN11), COM3 (CN20), COM4 (CN28)
Pin
Signal
1
Data Carrier Detect (DCD)
2
Data Set Ready (DSR)
3
Receive Date (RXD)
4
Request to Send (RTS)
5
Transmit Data (TXD)
6
Clear to Send (CTS)
7
Data Terminal Ready (DTR)
8
Ring Indicator (RI)
9 GND
10 NC
2.4.4 PS/2 Keyboard and Mouse Connectors (CN4)
CN4 is a DIN connector for PS/2 Mouse and PS/2 keyboard connection.
Pin
Signal
Pin
Signal
1 Keyboard
Data 7 GND
2 GND
8 Mouse
Data
3 GND
9 GND
4 VCC
10
VCC
5 GND
11
GND
6 Mouse Clock
12
Mouse Clock
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