Quectel EG21-G - Page 38

LTE Module Series
EG21-G Hardware Design
EG21-G_Hardware_Design 37 / 100
Table 8: RESET_N Pin Description
Pin Name
Pin No.
I/O
Description
Comment
RESET_N
20
DI
Reset the module
1.8V power domain
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
RESET_N
4.7K
47K
150ms~460ms
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 in the following figure.