CLM920_AC5 Mini PCIE LTE Module Hardware Manual
Shanghai Yuge Information Technology co., LTD
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Software download and upgrade
Data communication
AT Command
GNSS NMEA output, etc.
3.6 UART interface
CLM920_AC5 Mini PCIE module provides a set of UART interface, the serial port level is
1.8V. Through this serial port, you can send AT commands, print program log information,
etc..
The UART port of the module supports 9600, 19200, 38400, 57600, 115200, 230400bps baud
rate, the default is 115200bps.
The UART interface is defined as follows
：
Table 3-8 UART serial signal definition
Pin number
Signal name
I/O
Description
11
UART_RX
DI
Serial port to receive data
13
UART_TX
DO
Serial port to send data
28
UART_CTS
DI
* User allows module to send
25
UART_RTS
DO
* The module requests the user to send
If you need to use the serial port, please refer to the following serial port design.
Figure 3-11 UART serial port design
