User`s manual

CAPA831 Intel
®
Atom
TM
D2550/N2800/N2600 Processor 3.5” SBC
Board and Pin Assignments 21
2.4.10 COM2 Connector (CN11)
The COM2 port has +5V level power capability on DCD and +12V level on RI by setting
JP13 (see section 2.3.8). The pin assignments of RS-232/RS-422/RS-485 are listed in
table below. If you need COM2 port to support RS-422 or RS-485, please refer to
section 2.3.4.
2.4.11 SMBus Connector (CN12)
This connector is for SMBus interface. The SMBus (System Management Bus) is a
simple 2-wire bus for the purpose of lightweight communication. Most commonly it is
used for communication with the power source related applications such as on/off
instructions.
2.4.12 Audio Connector (CN13)
Pin 7 and pin 9 of connector CN13 can be set to different audio source by setting JP16
(see section 2.3.11).
Pin
RS-232
RS-422
RS-485
1
DCD
TX-
Data-
2
DSR
No use
No use
3
RXD
TX+
Data+
4
RTS
No use
No use
5
TXD
RX+
No use
6
CTS
No use
No use
7
DTR
RX-
No use
8
RI
No use
No use
9
GND
No use
No use
10
No use
No use
No use
Pin
Signal
1
CLK
2
DATA
3
GND
Pin
Signal
Pin
Signal
1
MIC_IN
2
GND
3
LINE_IN_L
4
GND
5
LINE_IN_R
6
GND
7
AUDIO_OUT_L
8
GND
9
AUDIO_OUT_R
10
GND