Turn On And Off Scenarios; Turn On Module Using The Pwrkey - Quectel SC200L-EM Hardware Design

SC200L Hardware Design

3.5. Turn on and off Scenarios

3.5.1. Turn on Module Using the PWRKEY

The module can be turned on by driving the PWRKEY pin to a low level for at least 2.5s. PWRKEY pin is
pulled to VBAT internally. It is recommended to use an open drain/collector driver to control the PWRKEY.
A simple reference circuit is illustrated in the following figure.
R3
PWRKEY
1K
>2.5 s
R1
Q1
4.7K
Turn on pulse
R2
47K
Figure 5: Turn on the Module Using Driving Circuit
The other way to control the PWRKEY is by using a button directly. A TVS component is indispensable to
be placed nearby the button for ESD protection. A reference circuit is shown in the following figure.
Figure 6: Turn on the Module Using Keystroke
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