Product Info

LTE Standard Module Series
EC25 Hardware Design
EC25_Hardware_Design 47 / 112
1. In order to avoid damaging internal flash, please do not switch off the power supply when the module
works normally. Only after the module is shut down by PWRKEY or AT command, then the power
supply can be cut off.
2. When turning off module with AT command, please keep PWRKEY at high level after the execution of
power-off command. Otherwise the module will be turned on again after successfully turn-off.
3.8. Reset 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: Pin Definition of RESET_N
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
Pin Name Pin No. I/O Description Comment
RESET_N 20 DI Reset the module 1.8V power domain
NOTES