Turn On; Turn On The Module With Pwrkey - Quectel EC200A Series Hardware Design

3.5. Turn On

3.5.1. Turn on the Module with PWRKEY

Table 9: Pin Definition of PWRKEY
Pin Name
PWRKEY
When the module 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 500 ms. It is recommended to use an open drain/collector driver to control the
PWRKEY. A simple reference circuit is illustrated in the following figure.
Figure 9: Reference Circuit of Turning on the Module Using Driving Circuit
The other way to control the PWRKEY is using a button directly. When pressing the button, 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.
Figure 10: Reference Circuit of Turning on the Module with button
Pin No. I/O
21 DI
≥ 500 ms
Turn-on pulse
S1
TVS
Close to S1
Description
Turn on/off the module
4.7K
47K
Turn-on pulse
LTE Standard Module Series
Comment
VBAT power domain.
Active low.
PWRKEY
10 nF
PWRKEY
M odul e