Q7B300 Qseven Module Development Board
Board and Pin Assignments
13
2.5.1
COM Connectors (CN1 and CN39)
The board has three serial port connectors. The CN1 is a 2x5-pin wafer connector for
RS-232 interface from module.
CN1
The CN39 is a double-deck DB-9 connector for RS-232/422/485 interface from carrier
board. Each serial port is selectable to operate in different mode through BIOS setting.
CN39
Note
Use jumper JP3 to enable or disable COM port function on CN39, see
section 2.4.3.
Pin
Signal
1
NC
2
NC
3
Receive Data (RXD)
4
Request To Send (RTS)
5
Transmit Data (TXD)
6
Clear To Send (CTS)
7
NC
8
NC
9
Ground (GND)
10
NC
Pin Pin
RS-232
RS-422 RS-485
1
10
Data Carrier Detect
(DCD)
TX-
Data-
2
11
Receive Data (RXD)
TX+
Data+
3
12
Transmit Data (TXD)
RX+
No use
4
13
Data Terminal Ready
(DTR)
RX-
No use
5
14
Ground (GND)
No use
No use
6
15
Data Set Ready (DSR)
No use
No use
7
16
Request to Send (RTS)
No use
No use
8
17
Clear to Send (CTS)
No use
No use
9
18
Ring Indicator (RI)
No use
No use
