User`s manual

CAPA831 Intel
®
Atom
TM
D2550/N2800/N2600 Processor 3.5” SBC
20 Board and Pin Assignments
2.4.7 Power Output Connector (CN7)
Use CN7 for interfacing to SATA 2.5" HDD power supply.
2.4.8 COM3 and COM4 Connector (CN9)
Both COM3 and COM4 ports have +5V level power capability on DCD and 12V level on
RI by setting JP12 and JP11, respectively (see section 2.3.7 and 2.3.6). The pin
assignments are listed in table below.
2.4.9 COM1 Connector (CN10)
This connector is equipped with +5V level power capability on DCD and +12V level on
RI by setting JP15 (see section 2.3.10). The pin assignments of RS-232/RS-422/RS-485
are listed in table below. If you need COM1 port to support RS-422 or RS-485, please
refer to section 2.3.5.
Pin
Signal
1
+12V level
2
GND
3
GND
4
+5V level
Pin
Signal
Pin
Signal
1
DCD3
2
DSR3
3
RXD3
4
RTS3
5
TXD3
6
CTS3
7
DTR3
8
RI3
9
GND
10
N.C.
11
DCD4
12
DSR4
13
RXD4
14
RTS4
15
TXD4
16
CTS4
17
DTR4
18
RI4
19
GND
20
N.C.
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