Reset The Module - Quectel EC21 Series Hardware Design

3.8. Reset the Module

The RESET_N pin can be used to reset the module. The module can be reset by driving RESET_N to a
low level voltage for time between 150ms and 460ms.
Table 8: RESET_N Pin Description
Pin Name Pin No.
RESET_N 20
The recommended circuit is similar to the PWRKEY control circuit. An open drain/collector driver or button
can be used to control the RESET_N.
Reset pulse
Figure 14: Reference Circuit of RESET_N by Using Driving Circuit
Figure 15: Reference Circuit of RESET_N by Using Button
EC21_Hardware_Design
Description
Reset the module
TBD
4.7K
S2
DC Characteristics
V max=2.1V
IH
V min=1.3V
IH
V max=0.5V
IL
47K
RESET_N
TVS
Close to S2
Confidential / Released
LTE Module Series
EC21 Hardware Design
Comment
RESET_N
38 / 94