Yuga NB module hardware manual V1.01
Table Of Contents
- Chapter 1. Introduction
- Chapter 2. Review of modules
- Chapter 3. Interface application description
- Chapter 4. RF overall technical index
- Chapter 5. Electrical characteristics of interface
- Chapter 6. Structure and mechanical properties
- Chapter 7. Production and packaging
- Chapter 8. Terminology abbreviation
LPM2100 mg NB module hardware manual
Shang Hai YUGE Information Technology co., LTD
Page
20
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39
If you need to use the 2 wire serial port, you can refer to the following serial port design.
Figure 3-9 UART serial port design diagram
The module serial port is the TTL 2.8V electrical level. If the serial port needs to be
connected with the MCU which have 3.3V electrical level, a level conversion chip needs to
be added to realize the level matching. The chip connection mode can refer to the following
circuit.
Figure 3-10 UART level conversion circuit
3.6.2 RI interface
LPM2100 mg module supports serial sleep hiking function, RI pin can be used as an
interrupt to wake up the host.
Figure 3-11 RI pin signal waveform