Quectel EG915U Series - Page 34

LTE Standard Module Series
EG915U_Series_Hardware_Design 33 / 81
simple reference circuit is illustrated in the following figure.
PWRKEY
4.7K
47K
Turn-on pulse
2 s
10 nF
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.
PWRKEY
S1
Close to S1
TVS
Figure 10: Turing on the Module Using Button
The power-up scenario is illustrated in the following figure.