Figure 8: Turn On The Module By Driving Circuit - Quectel UC15 Hardware Design

UMTS/HSDPA Module Series
UC15 Hardware Design
When UC15 is in power down mode, it can be turned on to normal mode by driving the PWRKEY pin to
low level at least 0.1s. It is recommended to use an open collector driver to control the PWRKEY. You can
monitor the level of the STATUS pin to judge whether the module is turned on or not. After STATUS pin
outputting a high level, module is turned on. A simple reference circuit is illustrated in the following figure.

Figure 8: Turn on the Module by Driving Circuit

The other way to control the PWRKEY is to use a button directly. A TVS component is indispensable to be
placed nearby the button for ESD protection. When pressing the key, electrostatic strike may generate
from finger. A reference circuit is shown in the following figure.
Figure 9: Turn on the Module by Keystroke
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