User's Manual

GSM/GPRS/GNSS Module Series
MC60 Hardware Design
MC60_Hardware_Design Confidential / Released 41 / 99
Figure 16: Turn-on Timing
3.5.2. Power down
The following procedures can be used to turn off the module:
 Normal power down procedure: Turn off module using the PWRKEY pin
 Normal power down procedure: Turn off module using command AT+QPOWD
 Under-voltage automatic shutdown: Take effect when under-voltage is detected.
3.5.2.1. Power down Module Using the PWRKEY Pin
It is a safe way to turn off the module by driving the PWRKEY to a low level voltage for a certain time. The
power down scenario is illustrated in the following figure.
The power down procedure causes the module to log off from the network and allows the firmware to
Make sure that VBAT is stable before pulling down PWRKEY pin. The time of T
1
is recommended to be
100ms.
NOTE