CLM920_RC3(RV3 RE3)LCC Series CAT1 Module Hardware Manual
Shanghai YUGE Information Technology Co., Ltd.
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Picture index
Figure 2-1 CLM920_RC3 LCC module functional block diagram..................................... - 13 -
Figure 3-1 CLM920_RC3 module pin layout (TOP perspective)........................................- 15 -
Figure 3-2 Power supply design...........................................................................................- 24 -
Figure 3-3 GSM Burst transmit power drop limit................................................................- 25 -
Figure 3-4 LDO linear power reference circuit....................................................................- 25 -
Figure 3-5 DC switching power supply reference circuit.................................................... - 25 -
Figure 3-6 PMOS tube control power switch reference circuit............................................- 26 -
Figure 3-7 Power-on sequence diagram............................................................................... - 27 -
Figure 3-8 Open-collection drive start-up reference circuit.................................................- 28 -
Figure 3-9 Reference circuit for key start.............................................................................- 28 -
Figure 3-10 Shutdown timing diagram.................................................................................- 29 -
Figure 3-11 Reset reference circuit...................................................................................... - 30 -
Figure 3-12 Reset timing diagram........................................................................................- 30 -
Figure 3-13 USB connection design circuit diagram........................................................... - 31 -
Figure 3-14 Full-featured UART port design.......................................................................- 33 -
Figure 3-15 Four-wire serial port design..............................................................................- 33 -
Figure 3-16 Level conversion chip circuit............................................................................- 34 -
Figure 3-17 RI pin signal waveform.................................................................................... - 35 -
Figure 3-18 USIM design circuit diagram............................................................................- 35 -
Figure 3-19 USIM card hot swap detection......................................................................... - 37 -
Figure 3-20 Network indicator circuit diagram....................................................................- 39 -
Figure 3-21 PCM short frame mode timing diagram........................................................... - 40 -
Figure 3-22 PCM to analog voice map.................................................................................- 40 -
Figure 3-23 I2C interface reference circuit diagram............................................................ - 41 -
Figure 3-24 SD card interface reference circuit diagram..................................................... - 42 -
Figure 3-25 Antenna matching circuit..................................................................................- 44 -
Figure 3-26 The complete structure of the microstrip line...................................................- 45 -
Figure 3-25 The complete structure of the strip line............................................................ - 46 -
Figure 3-27 The reference ground is the structure of the third layer PCB microstrip
transmission line...................................................................................................................- 46 -
Figure 6-1 CLM920_RC3 appearance................................................................................. - 59 -
Figure 6-2 Front and side views of the module (unit: mm)..................................................- 60 -
