Table of Contents
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CLM920 TD3 LTE Module Hardware Usage Guide
7.1 Chapter overview....................................................................................................- 78 -
7.2 Module packaging and storage...............................................................................- 78 -
7.3 Production welding.................................................................................................- 78 -
Chapter 8 Appendix..............................................................................................................- 80 -
8.1 Chapter overview....................................................................................................- 80 -
8.2 Abbreviations..........................................................................................................- 80 -
8.3 Encoding.................................................................................................................- 81 -
8.4 Safety and precautions............................................................................................- 84 -
Figure 2-1 Functional block diagram of the CLM920 TD3 LCC module........................... - 15 -
Figure 3-1 LCC module interface definition........................................................................ - 17 -
Figure 3-2 GSM TDMA network burst current supply voltage drop...................................- 29 -
Figure 3-3 VBAT power supply........................................................................................... - 29 -
Figure 3-4 LDO linear power supply reference circuit........................................................ - 29 -
Figure 3-5 DC switching power supply reference circuit.................................................... - 30 -
Figure 3-6 PMOS tube control power switch reference circuit............................................- 30 -
Figure 3-7 Startup timing diagram....................................................................................... - 32 -
Figure 3-8 Power-on reference circuit..................................................................................- 33 -
Figure 3-9 Reset reference power.........................................................................................- 33 -
Figure 3-10 Reset timing diagram........................................................................................- 34 -
Figure 3-11 USB connection design circuit diagram........................................................... - 35 -
Figure 3-12 Full-featured serial port design.........................................................................- 37 -
Figure 3-13 UART serial port design................................................................................... - 37 -
Figure 3-14 Level conversion chip circuit............................................................................- 37 -
Figure 3-15 RI pin signal waveform.................................................................................... - 38 -
Figure 3-16 USIM design circuit diagram............................................................................- 40 -
Figure 3-17 Hot swap detection of the USIM card.............................................................. - 41 -
Figure 3-18 Network indicator circuit diagram....................................................................- 43 -
Figure 3-19 STATUS Pin Reference Circuit........................................................................ - 44 -
Figure 3-20 PCM short frame mode timing diagram........................................................... - 45 -
Figure 3-21 PCM to analog voice map.................................................................................- 45 -
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Graph index
- 5 -
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