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SIM800H Datasheet(PDF) 55 Page - SIMCom |
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SIM800H Datasheet(HTML) 55 Page - SIMCom |
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55 / 73 page  Smart Machine Smart Decision 5. PCB Layout Usually, most electronic products with good performance are based on good PCB layout. A bad PCB layout will lead to lots of issues, like TDD noise, SIM card not be detected, etc. the final solution for these problems is to redo PCB layout. Making good PCB layout at beginning will save develop schedule and cost as well. This section will give some guidelines on PCB layout, in order to eliminate interfere or noise by greatest degree, and save product development period. 5.1 Pin Assignment Before PCB layout, we should learn well about pin assignment in order to get reasonable layout with so many external components. Following figure is the overview of pin assignment of the module. Figure 54: Pin assignment SIM800H&SIM800L_Hardware Design_V2.02 55 2015-07-27 |
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