UMTS/HSDPA Module
UC15 Hardware Design
UC15_Hardware_Design Confidential / Released 26 / 72
Figure 5: Turn on the Module Using Driving Circuit
The other way to control the PWRKEY is using 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 showed in the following figure.
Figure 6: Turn on the Module Using Keystroke
The turn on scenarios is illustrated as the following figure.
