Product Info

Smart Module Series
SC200R Series Hardware Design
SC200R_Series_Hardware_Design 38 / 125
3.5. Turn on and off Scenarios
3.5.1. Turn on the Module Using PWRKEY
The module can be turned on by driving the PWRKEY pin low for at least 1.6 s. The PWRKEY pin is
pulled up to 1.8 V internally. It is recommended to use an open drain/collector driver to control PWRKEY.
A simple reference circuit is illustrated in the following figure.
Turn on pulse
PWRKEY
4.7K
47K
>1.6 s
R1
R2
Q1
R3
1K
Figure 5: Turn on the Module Using Driving Circuit
The other way to control PWRKEY is by using a button directly. You must place a TVS component nearby
the button for ESD protection. A reference circuit is shown in the following figure.
Figure 6: Turn on the Module Using Keystroke