Reference Design - SimCom SIM68R Hardware Design

7 Reference Design

Notes:
1) The pin VCC_RF provides a 2.8V output level for external active antenna.
For active antenna, if antenna's power domain is 2.8V, the pin VCC_RF could supply the voltage .Do not connect VCC_RF
pin to RF_IN pin directly, use V_ANT pin to supply power. Connect VCC_RF pin to V_ANT pin with 10ohm. If the
antenna's power is not 2.8v, keep the pin VCC_RF open.
For passive antenna, the pin VCC_RF should be kept open, the pin V_ANT should be connected to GND.
SIM68R_Hardware Design_V1.02
Figure 15: Example application schematic with UART
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Smart Machine Smart Decision
2013-01-22