Quectel M12 User Manual

M12 Hardware Design
M12_Hardware_Design_V3.3 - 40 -
3.8.1.2. The connection of UART
The connection between module and host via UART port is very flexible. Three connection styles
are illustrated as below.
UART Port connection is shown as below when it is applied in modulation-demodulation.
TXD
RXD
RTS
CTS
DTR
DCD
RI
TXD
RXD
RTS
CTS
DTR
DCD
RING
Module (DCE)
Serial portSerial Port
GND GND
PC (DTE)
Figure 18: Connection of all functional UART port
Three lines connection is shown as below.
TXD
RXD
GND
UART PORT
RTS
0R
TXD
RXD
GND
Module(DCE)
Host (DTE)
Controller
Figure 19: Connection of three lines UART port
UART Port with hardware flow control is shown as below. This connection will enhance the
reliability of the mass data communication.
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Quectel M12 Specifications

General

Brand	Quectel
Model	M12
Category	Control Unit
Language	English