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CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
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8.1 Chapter overview....................................................................................................- 75 -
8.2 Abbreviations..........................................................................................................- 75 -
8.3 Encoding.................................................................................................................- 76 -
8.4 Safety and precautions............................................................................................- 79 -
Figure
Figure 2-1 Functional block diagram of the CLM920 NC3 LCC module...........................- 15 -
Figure 3-1 LCC module interface definition........................................................................- 17 -
Figure 3-2 GSM TDMA network burst current supply voltage drop...................................- 26 -
Figure 3-3 VBAT power supply........................................................................................... - 26 -
Figure 3-4 LDO linear power supply reference circuit........................................................ - 27 -
Figure 3-5 DC switching power supply reference circuit.................................................... - 27 -
Figure 3-6 PMOS tube control power switch reference circuit............................................- 27 -
Figure 3-7 Startup timing diagram....................................................................................... - 29 -
Figure 3-8 Power-on reference circuit..................................................................................- 30 -
Figure 3-9 Reset reference circuit........................................................................................ - 30 -
Figure 3-10 Reset timing diagram........................................................................................- 31 -
Figure 3-11 USB connection design circuit diagram........................................................... - 32 -
Figure 3-12 Full-featured serial port design.........................................................................- 34 -
Figure 3-13 UART serial port design................................................................................... - 34 -
Figure 3-14 Level conversion chip circuit............................................................................- 35 -
Figure 3-15 RI pin signal waveform.................................................................................... - 36 -
Figure 3-16 USIM design circuit diagram............................................................................- 37 -
Figure 3-17 Hot swap detection of the USIM card.............................................................. - 39 -
Figure 3-18 Network indicator circuit diagram....................................................................- 41 -
Figure 3-19 STATUS Pin Reference Circuit........................................................................ - 41 -
Figure 3-20 PCM short frame mode timing diagram........................................................... - 43 -
Figure 3-21 PCM to analog voice map.................................................................................- 43 -
Figure 3-22 I2C interface reference circuit diagram............................................................ - 44 -
Figure 3-23 SD card interface reference circuit diagram..................................................... - 48 -
Figure 3-24 I2S to analog voice map................................................................................... - 50 -