SERIAL, HEADPHONES, LINE IN, MIC Connectors
The SERIAL connector is a DB-9 male connector. The HEADPHONES
jack is a stereo mini-jack (3.5 mm) that connects to headphones. The LINE
IN jack is a stereo mini-jack (3.5 mm) that connects to a stereo audio
source (not an audio source from a video device). The MIC jack is a stereo
mini-jack (3.5 mm) that connects to a microphone.
HEADPHONES
LINE IN
MIC
SERIAL connector
Pin
Signal Name
1
DCD
2
RXD
3
TXD
4
DTR
5
LOGIC GND
6
DSR
7
RTS
8
CTS
9
RI
SERIAL
1
5
6
9
System Board
55