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SIM7020_Hardware_Design_V1.02 20 2018-07-25
*Note: The STATUS pin can be used to detect whether module is powered on or not. When module
has been powered on and firmware goes ready, STATUS will be high level, or else STATUS will
still low level.
3.4.3 Reset Function
SIM7020 can be reset by pulling the RESET pin to ground.
Note: This function is only used as an emergency reset. The RESET pin will be ineffectiveness in
the power off mode.
The RESET pin has been pulled up to 1.8V with a 40KΩ resistor internally. So it does not need to
be pulled up externally. It is strongly recommended to put a100nF capacitor and an ESD protection
diode close to the RESET pin. Please refer to the following figure for the recommended reference
circuit.
Figure 9: Reference reset circuit
Table 10: RESET pin electronic characteristic
Symbol Description Min. Typ. Max. Unit
T
reset
The active low level time impulse on
RESET pin to reset module
48 - - ms
V
IH
Input high level voltage 0.7*VBAT
V
V
IL
Input low level voltage 0.3*VBAT V
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