Product Info

LTE Module Series
EC21 Hardware Design
EC21_Hardware_Design
3-39
/ 105
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.
Figure 14: Reference Circuit of RESET_N by Using Driving Circuit
Figure 15: Reference Circuit of RESET_N by Using Button
The reset scenario is illustrated in the following figure.
RESET_N
20
DI
Reset the module
1.8V power domain