Smart Module Series
SC206E_Series_Hardware_Design 39 / 115
The turning-on scenario is illustrated in the following figure.
VBA T(Typ. 3.8 V)
PWRKEY
> 1.6 s
Others
LDO15A_1V8
47 s
132 ms
Software
controlled
LDO17A_3V0
Acti ve
Note2
Software
controlled
Figure 8: Turn-on Timing
1. When the module is turned on for the first time, the turn-on timing may be different from that shown
above.
2. Make sure that VBAT is stable before pulling down PWRKEY. It is recommended to wait until VBAT is
stable at 3.8 V for at least 30 ms before pulling down PWRKEY. Additionally, do not keep pulling
PWRKEY down all the time.
NOTE