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SIM800H Datasheet(PDF) 35 Page - SIMCom |
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SIM800H Datasheet(HTML) 35 Page - SIMCom |
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35 / 73 page  Smart Machine Smart Decision Figure 29: RI behaviour of URC or receive SMS However, if the module is used as caller, the RI will remain high. Please refer to the following figure. Figure 30: RI behaviour as a caller 4.7. Audio Interfaces SIM800H&SIM800L provides two analog inputs (MIC1P/1N; MIC2P/2N), which could be used for electret microphone. The module also provides two analog outputs (SPK1P/1N; SPK2P/2N). Table 13: Audio interface definition Pin name Pin number Function MIC1P 52 Main Audio input positive MIC1N 12 Main Audio input negative SPK1P 53 Main Audio output positive Main SPK1N 13 Main Audio output negative MIC2P 9 Secondary Audio input positive MIC2N 10 Secondary Audio input negative SPK2P 51 Secondary Audio output positive Secondary SPK2N 11 Secondary Audio output negative SPK1P/1N output can directly drive 32Ω receiver, SIM800H&SIM800L internal has class-AB audio amplifier, the following table is class-AB performance: SIM800H&SIM800L_Hardware Design_V2.02 35 2015-07-27 |
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