Turn Off - Quectel SC20 Series Hardware Design

NOTE
1. When the module is powered on for the first time, its timing of turning on will be 45 ms longer than that
shown above.
2. Make sure that VBAT is stable before pulling down PWRKEY pin. The recommended time between
them is no less than 30 ms. PWRKEY pin cannot be pulled down all the time.

3.5.2. Turn off

Drive the PWRKEY pin low for at least 1 s, and then choose to turn off the module when the prompt
window comes up.
The other way to turn off the module is to drive PWRKEY low for at least 8 s. The module will execute
forced shutdown. The forced power-down scenario is illustrated in the following figure.
SC20_Series_Hardware_Design
Figure 8: Timing of Turning on Module
Smart Module Series
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