Monitor The Power Supply; Turn On And Off Scenarios; Turn On Module Using The Pwrkey - Quectel EC25-V User Manual

3.6.4. Monitor the Power Supply

You can use the AT+CBC command to monitor the VBAT_BB voltage value. For more details, please
refer to document [2].

3.7. Turn on and off Scenarios

3.7.1. Turn on Module Using the PWRKEY

The following table shows the pin definition of PWRKEY.
Table 7: PWRKEY Pin Description
Pin Name Pin No.
PWRKEY 21
When EC25 is in power down mode, it can be turned on to normal mode by driving the PWRKEY pin to a
low level for at least 100ms. It is recommended to use an open drain/collector driver to control the
PWRKEY. After STATUS pin (require external pull-up) outputting a low level, PWRKEY pin can be
released. A simple reference circuit is illustrated in the following figure.
≥ 100ms
Turn on pulse
The other way to control the PWRKEY is using a button directly. A TVS component is indispensable to be
placed nearby the button for ESD protection. When pressing the key, electrostatic strike may generate
from finger. A reference circuit is shown in the following figure.
EC25-V_User_Manual
69
Description
Turn on/off the module.
4.7K
Figure 10: Turn on the Module Using Driving Circuit
Confidential / Released
DC Characteristics
V max=2.1V
IH
V min=1.3V
IH
V max=0.5V
IL
47K
LTE Module Series
EC25-V User Manual
Comment
PWRKEY
28 /