Smart Module Series
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3.5.2. Turn Off/Restart the Module
To turn off the module, you should drive the PWRKEY pin low for at least 1 s and then choose to turn off
the module when the prompt window comes up.
It can also be forced to restart by pulling down the PWRKEY key for at least 7 s. The restart timing is as
follows:
VBAT
PWRKEY
Others
> 7 s
Hardware Reset
Figure 9: Restart Timing
3.6. Power Output
The module supports output of regulated voltages for peripheral circuits. During application, it is
recommended to connect a 33 pF and a 10 pF capacitor in parallel in the circuit to suppress
high-frequency noise.
Table 8: Power Description
Pin Name
Default Voltage (V)
Driving Current (mA)
@ Idle State
LDO1_1V85
1.85
100
Keeps ON
LDO2_1V8
1.80
200
-
LDO3_2V8
2.80
150
-
LDO4_2V8
2.80
200
Keeps ON
SD_VDD
3.00
400
-
USIM1_VDD
1.80/2.95
50
-