Quectel EC200U Series Hardware Design page 39

LTE Standard Module Series
PWRKEY
≥ 2 s
4.7K
10 nF
Turn-on pulse
47K
Figure 10: Turn on Module by Using Driving Circuit
Another way to control the PWRKEY is to use a button directly. When pressing the button, electrostatic
strike may generate from finger. Therefore, 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 11: Turn on Module by Using Button
The power-up scenario is illustrated in the following figure.
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