User Manual

Smart Machine Smart Decision
Figure 9: Power interface
When a valid power appears the terminal will power up automatic, for the MCU that inside the terminal processed
the power up part, MCU also acts as a Watch Dog, when the terminal runs wrong, MCU will cut off the power
and recover it immediately to restart the terminal.
6.2 Serial Interface
T5320 provides one asynchronous RS232 serial port (female).The RS232 standard interface serves to connect a
PC, Data Terminal Equipment (DTE) or other application, which acts as host controller of the T5320 Terminal
with all its functions. Through the RS232 interface it can be used as GSM/GPRS modem for sending and
receiving of SMS, Data and Fax calls.
Figure 10: Pin assignment RS-232 (D-Sub 9-pole female)
Table 4: 9-pole D-Sub (female) RS-232
Pin no Signal name I/O Function
1 DCD O Data Carrier Detected
2 RXD O Receive Data
T5320_User Guide_V1.04 15 2013- 04-15