User's Manual
Smart Machine Smart Decision
SIM5320AD EVB User Guide 02.04.2011
11
4.4 RS232 Interface
Figure 7: Serial Port
J205 is 9 pins standard RS232 UART interface. It can be connected to a PC directly.
Table 4: Serial Interface
Pin Signal I/O Description
1 DCD O Data carrier detection
2 TXD O Transmit data
3 RXD I Receive data
4 DTR I Data Terminal Ready
5 GND Ground
6 NC NC
7 RTS I Request to Send
8 CTS O Clear to Send
9 RI O Ring Indicator