Quectel EG915U Series Hardware Design page 34

LTE Standard Module Series
simple reference circuit is illustrated in the following figure.
PWRKEY
2 s
4.7K
10 nF
Turn-on pulse
47K
Figure 9: Turing on the Module Using Driving Circuit
Another way to control the PWRKEY is using a button directly. When you are pressing the key,
electrostatic strike may be generated from finger. Therefore, you must place a TVS component nearby the
button for ESD protection. A reference circuit is shown in the following figure.
S1
PWRKEY
TVS
Close to S1
Figure 10: Turing on the Module Using Button
The power-up scenario is illustrated in the following figure.
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