Smart LTE Module Series
SC600Y&SC600T Hardware Design
SC600Y&SC600T_Hardware_Design 47 / 128
The turning on scenario is illustrated in the following figure.
VBA T(Typ.:3.8V)
PWRKEY
>1.6s
Others
LDO5_1P8
38s
LDO6_1P8
61.2ms
Software
controlled
LDO17_2P85
Active
LDO10_2P8
Note2
Software
controlled
Figure 8: Timing of Turning on Module
1. The turn-on timing might be different from the above figure when the module powers on for the first
time.
2. Make sure that VBAT is stable before pulling down PWRKEY pin. The recommended time between
them is no less than 30ms. PWRKEY cannot be pulled down all the time.
3.5.2. Turn off Module
Pull down PWRKEY for at least 1s, and then choose to turn off the module when the prompt window
comes up.
Another way to turn off the module is to drive PWRKEY to a low level for at least 8s. The module will
execute forced shutdown.
The forced power-down scenario is illustrated in the following figure.
NOTES
