Turn Off Module; Turn Off Module Using The Pwrkey Pin - Quectel UC200T-EM Hardware Design

Turn-on pulse
The other way to control the PWRKEY is using a button directly. When pressing the key, electrostatic
strike may generate from finger. Therefore, a TVS component is indispensable to be placed nearby the
button for ESD protection. A reference circuit is shown in the following figure.

3.6.2. Turn off Module

The following procedures can be used to turn off the module:
⚫ Normal power down procedure: Turn off the module using the PWRKEY pin.
Normal power down procedure: Turn off the module using AT+QPOWD command.
⚫

3.6.2.1. Turn off Module Using the PWRKEY Pin

Driving the PWRKEY pin to a low level voltage, the module will execute power-down procedure after the
PWRKEY is released.
UC200T-EM_Hardware_Design
4.7K
Figure 6: Turn on the Module Using Driving Circuit
S1
TVS
Figure 7: Turn on the Module Using Keystroke
47K
PWRKEY
Close to S1
UMTS/HSPA(+) Module Series
UC200T-EM Hardware Design
PWRKEY
10nF
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