Smart Machine Smart Decision




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SIM800L
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Smart Machine Smart Decision 
SIM800H&SIM800L_Hardware Design_V2.02 4 2015-07-27 
4.7.1. Speaker Interfaces Configuration........................................................................................................ 36 
4.7.2. Microphone Interfaces Configuration ................................................................................................. 36 
4.7.3. Audio Electronic Characteristic .......................................................................................................... 37 
4.7.4. TDD .................................................................................................................................................... 37 
4.8.
SIM Card Interface..............................................................................................................38
4.8.1. SIM Card Application ......................................................................................................................... 38 
4.8.2. SIM Card Design Guide...................................................................................................................... 39 
4.8.3. Design Considerations for SIM Card Holder ...................................................................................... 39 
4.9.
PCM Interface.....................................................................................................................42
4.9.1. PCM Multiplexing Function ............................................................................................................... 42 
4.9.2. PCM Interface ..................................................................................................................................... 43 
4.9.3. LCD Display/SPI Interface ................................................................................................................. 43 
4.9.4. SD Card Interface................................................................................................................................ 43 
4.10.
Keypad Interface.................................................................................................................44
4.10.1. 
Keypad Multiplexing Function........................................................................................................ 46 
4.11.
I2C Bus ...............................................................................................................................46
4.11.1. 
I2C Multiplexing Function .............................................................................................................. 47 
4.12.
General Purpose Input/Output (GPIO) ...............................................................................47
4.13.
ADC ....................................................................................................................................47
4.14.
PWM ...................................................................................................................................48
4.14.1. 
PWM Multiplexing Function........................................................................................................... 49 
4.15.
Network Status Indication...................................................................................................49
4.15.1. 
NETLIGHT Multiplexing Function................................................................................................. 50 
4.16.
Operating Status Indication.................................................................................................50
4.16.1. 
STATUS Multiplexing Function ...................................................................................................... 50 
4.17.
LED Interface......................................................................................................................50
4.18.
RF Synchronization Signal .................................................................................................51
4.18.1. 
RF_SYNC Multiplexing Function................................................................................................... 52 
4.19.
Antenna Interface................................................................................................................52
4.19.1. 
GSM Antenna Interface ................................................................................................................... 52 
4.19.2. 
Bluetooth Antenna Interface (Only SIM800H)................................................................................ 53 
4.19.3. 
FM Antenna Interface ...................................................................................................................... 53 

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