Yuga CLM920_AC3 - Page 6

CLM920_AC3 Module Hardware Usage Guide
Shanghai Yuge Information Technology co., LTD
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Figure 3-22 I2C interface reference circuit diagram............................................................ - 35 -
Figure 3-23 Antenna matching circuit..................................................................................- 38 -
Figure 3-24 Comparison of received signal strengths with and without diversity antennas- 38 -
Figure 3-25 Complete structure of the microstrip line......................................................... - 39 -
Figure 3-26 Complete structure of the strip line.................................................................. - 40 -
Figure 3-27 Reference ground is the third layer PCB microstrip transmission line structure- 40 -
Figure 6-1 Appearance of the CLM920 AC3....................................................................... - 50 -
Figure 6-2 Front view and side view of the module (unit: mm).......................................... - 50 -
Figure 6-3 Bottom view of the module (unit: mm).............................................................. - 51 -
Figure 6-4 Recommended module package (unit: mm)....................................................... - 52 -
Figure 7-1 Reflow soldering temperature graph.................................................................. - 54 -
Table index
Table 2-1 Key Features...........................................................................................................- 3 -
Table 3-1 Pin definitions........................................................................................................ - 9 -
Table 3-2 IO parameter definition........................................................................................ - 11 -
Table 3-3 Pin description...................................................................................................... - 11 -
Table 3-4 Power pin definitions........................................................................................... - 16 -
Table 3-5 Switching machine pin definition........................................................................ - 19 -
Table 3-6 Boot timing parameters........................................................................................ - 20 -
Table 3-7 Module shutdown mode....................................................................................... - 21 -
Table 3-8 Reset foot definition............................................................................................. - 22 -
Table 3-9 RESET pin parameters......................................................................................... - 23 -
Table 3-10 USB interface pin definition.............................................................................. - 24 -
Table 3-11 Main serial port signal definition....................................................................... - 25 -
Table 3-12 Debugging serial port pin definitions.................................................................- 27 -
Table 3-13 SIM card signal definition..................................................................................- 28 -