Quectel SC20-WL Hardware Design page 33

Smart Wi-Fi Module Series
SC20-WL Hardware Design
PWRKEY
≥1.6s
R1
Q1
4.7K
Turn on pulse
R2
47K
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.
S1
PWRKEY
TVS
Close to S1
Figure 7: Turn on the Module Using Keystroke
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