Uart Interface - YUGE LPM2100 bg Series Usage Manual

LPM2100 bg NB Module Hardware Usage Guide
Symbol Description
Treset Low pulse width
VIH RESET input high level voltage
VIL RESET input low level voltage
The LPM2100 bg series module supports AT command reset, and the AT command
AT+TRB can be used to restart the module. Detailed instructions can be found in the
"RDA_AT Command Manual" provided by the domain.

3.5 UART interface

The LPM2100 bg series modules provide three sets of UART interfaces. Main serial port,
debug serial port, auxiliary serial port. The serial port level is the IO output level value. The
module is a DCE (Data Communication Equipment) device.
The main serial port can realize AT interactive instructions and peripheral data
interaction.
Debug the serial port to upgrade the firmware, view log information, and so on.
The module serial port baud rate can be set to 4800, 9600, 19200, 38400, 57600, 115200,
230400, 460800, 921600bps baud rate, the default is 57600bps.
Pin Pin name
Main serial interface
29 RXD
30 TXD
Shanghai Yuge Information Technology Co., Ltd.
Min
100
0.68
-0.3
Figure 3-7 Reset timing diagram
Table 3-6 Serial port pin definitions
IO Functional description
DI Master data reception
DO Master data transmission
Typical Max
600
1.07 1.41
0 0.68
Remarks
IO voltage domain
IO voltage domain
unit
ms
V
V
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