User's Manual

LTE Module
EC20 Hardware Design
EC20_Hardware_Design Confidential / Released 33 / 83
Reset pulse
RESET_N
4.7K
47K
≥ 150ms
Figure 14: Reference Circuit of RESET_N by Using Driving Circuit
RESET_N
S2
Close to S2
TVS
Figure 15: Reference Circuit of RESET_N by Using Button
The reset scenario is illustrated as the following figure.
V
IL
≤ 0.5V
V
IH
≥ 1.3V
VBAT
≥150ms
RESETTING
Module
Status
RUNNING
RESET_N
RUNNING
≥ 9s
Figure 16: Timing of Resetting Module
1. Use the RESET_N only when turning off the module by the command AT+QPOWD and the
PWRKEY pin failed.
2. Ensure that there is no large capacitance on the PWRKEY and RESET_N pins.
NOTES