Quectel SC20 Series Hardware Design page 38

Smart Module Series
Figure 6: Turn on the Module Using Driving Circuit
The other way to control the PWRKEY is using a button directly. A TVS component is indispensable to be
placed nearby the button for ESD protection. A reference circuit is shown in the following figure.
Figure 7: Turn on the Module Using Keystroke
The turning on scenario is illustrated in the following figure.
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