LPWA Module Series
BG952A-GL_QuecOpen_Hardware_Design
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Table 10: PWRKEY Pin Definition
Pin Name
Pin No. I/O
Description
Comment
PWRKEY
15
DI
Turn
on/off
the
module
Internally pulled up with a 470 kΩ
resistor.
When the module is in power-off mode, it can be turned on by driving PWRKEY low for 500–1000 ms. It is
recommended to use an auto power-on circuit to control PWRKEY, as shown below.
Figure 5: Auto Power-on Circuit
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With the above circuit, the module automatically powers on when the power supply is switched on, and
keeps PWRKEY at a high level after successful power-on. With this design, if you intend to power on the
module again after you power it off with an API or AT command, switch off the power supply of the
module and remain in switch-off state for at least 200 ms before you switch on the power supply to
enable automatic power-on of the module.
If the device has an extra MCU, it is recommended to use an open drain/collector driver to control the
PWRKEY. A simple reference circuit is illustrated in the following figure.
NOTE
