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Smart Machine Smart DecisionBog'liq SIM800L Smart Machine Smart Decision
SIM800H&SIM800L_Hardware Design_V2.02 9 2015-07-27
FIGURE 47: LED DRIVER REFERENCE CIRCUIT..................................................................................................... 51
FIGURE 48: RF_SYNC SIGNAL DURING TRANSMIT BURST ................................................................................ 51
FIGURE 49: GSM ANTENNA MATCHING CIRCUIT ................................................................................................. 52
FIGURE 50: GSM SIMPLE ANTENNA MATCHING CIRCUIT .................................................................................. 53
FIGURE 51: BLUETOOTH ANTENNA MATCHING CIRCUIT .................................................................................. 53
FIGURE 52: FM ANTENNA MATCHING CIRCUIT .................................................................................................... 54
FIGURE 53: GND PIN OF THE EARPHONE USE TO BE THE FM ANTENNA INTERFACE ................................. 54
FIGURE 54: PIN ASSIGNMENT.................................................................................................................................... 55
FIGURE 55: RECOMMENDED PCB LAYOUT ............................................................................................................ 57
FIGURE 56: TOP AND BOTTOM VIEW OF SIM800H ................................................................................................ 65
FIGURE 57: TOP AND BOTTOM VIEW OF SIM800L................................................................................................. 65
FIGURE 58: TYPICAL SOLDER REFLOW PROFILE OF LEAD-FREE PROCESSES.............................................. 66
Smart Machine Smart Decision
SIM800H&SIM800L_Hardware Design_V2.02 10 2015-07-27
Version History
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