Quectel LTE-A Series Hardware Design page 44

The timing of reset scenario is illustrated by the following figure.
VBAT
RESET_N
VDD_EXT
VDD_RF
USIM_VDD
Module
Status
NOTES
1. RESET_N can only be used when the module failed to be turned off either by AT+QPOWD
command or PWRKEY.
2. Please ensure that there is no capacitor with high capacitance on PWRKEY and RESET_N pins.
EG18_Hardware_Design
S2
Figure 16: Reference Circuit of RESET_N with a Button
≥212.5ms
≥204ms
≥205ms
≥250ms
Running
Figure 17: Timing of Resetting the Module
RESET_N
TVS
Close to S2
≤600ms
≤0.5V
V
IL
Resetting
LTE-A Module Series
EG18 Hardware Design
≥1.3V
V
IH
≥2.5ms
≥17s
≥16s
Restart
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