User Manual

GSM/GPRS Module Series
GC10 Hardware Design
GC10_Hardware_Design Confidential / Released 30 / 76
3.4.3. Restart
You can restart the module by driving the PWRKEY to a low level voltage for a certain time, which is
similar to the way of turning on module. Before restarting the module, at least 500ms should be delayed
after detecting the low level of VDD_EXT. The restart timing is illustrated as the following figure:
Figure 13: Timing of Restarting System
The module can also be restarted by the PWRKEY after emergency shutdown.
Figure 14: Timing of Restarting System after Emergency Shutdown
Before pulling down the EMERG_OFF pin, please ensure that the PWRKEY pin has been released.
NOTE