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IMB205 LGA1156 ATX Motherboard User’s Manual
Jumpers and Connectors
23
2.4.10 COM3/COM4 Connectors (CN12, CN16)
The board has the onboard serial ports COM3, 4 (CN12, CN16), two
2x5-pin 2.54 pitch box-header to support RS-232.
Pin
Signal
Pin
Signal
1
Data Carrier Detect
(DCD)
2
Data Set Ready (DSR)
3 Receive
Data
(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
CN12/CN16
2.4.11
LAN1/2 Internal LED Connectors (CN14, CN15)
Pin
Signal
1
Activity Link LED(+)
2 Activity
Link
LED(-)
3
100 Mbps Speed LED, Low Active
4 +3.3V
5
1G Mbps Speed LED, Low Active
CN14,CN15