LTE Standard Module Series
EG915U-EU_Hardware_Design 33 / 81
3.5. Turn On
3.5.1. Turn on the Module with PWRKEY
Table 9: Pin Definition of PWRKEY
When the module is in power off mode, it can be turned on and enter normal operation mode by driving
the PWRKEY low for at least 2 s. It is recommended to use an open drain/collector driver to control the
PWRKEY.
Figure 9: Reference Circuit of Turing on the Module with Driving Circuit
Another way to control the PWRKEY is by using a button directly. When pressing the button, an
electrostatic strike may generate from finger. Therefore, a TVS component shall be placed near the button
for ESD protection.
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