User's Manual

MeiG hardware design guide
6
Figure 4.4：VBAT lowest voltage drop
4.2 Power on and off
Do not turn on the module when the module's temperature and voltage limits are exceeded. In
extreme cases, such operations can cause permanent damage to the module.
4.2.1 Module Boot
The user can power up the module by pulling the PWRKEY pin (52) low. Pull down for at least
5 seconds. This pin has been pulled up to 1.8V in the module. The recommended circuit is as
follows:
Figure 4.5：Using an external signal to drive the module to boot