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LTE-A Module Series
EG18 Hardware Design
EG18_Hardware_Design 43 / 104
RESET_N
S2
Close to S2
TVS
Figure 16: Reference Circuit of RESET_N with a Button
The timing of reset scenario is illustrated by the following figure.
V
IL
≤0.5V
V
IH
≥1.3V
VBAT
≥250ms
Resetting
Module
Status
Running
RESET_N
Restart
≤600ms
≥204ms
VDD_RF
≥212.5ms
VDD_EXT
≥205ms
USIM_VDD
≥16s
≥2.5ms
≥17s
Figure 17: Timing of Resetting the Module
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.
NOTES