![Quectel LTE-A Series Hardware Design Download Page 40](http://html.mh-extra.com/html/quectel/lte-a-series/lte-a-series_hardware-design_772113040.webp)
LTE-A Module Series
EG18 Hardware Design
EG18_Hardware_Design 39 / 104
3.6. Turn on and off Scenarios
3.6.1. Turn on the Module Through PWRKEY
The following table shows the pin definition of PWRKEY.
Table 8: PWRKEY Pin Description
When EG18 is in power down mode, it can be turned on and enter into normal operation mode by driving
the PWRKEY pin to a low level voltage for at least 500ms. It is recommended to use an open
drain/collector driver to control the PWRKEY. After STATUS pin outputs a high level, PWRKEY can be
released. A simple reference circuit is illustrated by the following figure.
Turn on pulse
PWRKEY
4.7K
47K
≥500ms
Figure 11: Turn on the Module with a Driving Circuit
Pin Name Pin No.
Description
DC Characteristics
Comment
PWRKEY
2
Turn on/off the module
V
IH
max=2.1V
V
IH
min=1.3V
V
IL
max=0.5V
1.8V power domain.
Pulled-up internally.
Active low.