8
2. Serial Communication port
2.1 Serial communication port
ATP12 has 3 serial ports for communication.
Serial ports COM1/COM2/COM3 are RS-232C dedicated port so they can be used as
RS-232C only.
2.1.1 RS-232C Port
COM1/COM2/COM3 serial ports
support the RS-232C only.
<Table 2-1> shows pin functions for
RS-232C. Before you connect device
with serial port, verify the pin
functions.
Connector Type
핀
Female)
Pin Number
Function
1
DCD (Data Carrier Detect)
2
RXD (Receive Data)
3
TXD (Transmit Data)
4
DTR (Data Terminal Ready)
5
GND (Ground)
6
DSR (Data Set Ready)
7
RTS (Request to Send)
8
CTS (Clear to Send)
9
RI (Ring Indicator)
<Table 2-1> RS-232C Pin Functions
