User's Manual

GE910 Hardware User Guide
GE910 Hardware User GuideGE910 Hardware User Guide
GE910 Hardware User Guide
1vv0300962 Rev.9-bis3 2013-05-20
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 52 of 87
Mod. 0805 2011-07 Rev.2
9. USB Port
The GE910 includes one integrated universal serial bus (USB) transceiver USB 2.0 FS.
9.1. USB 2.0 FS
This port is compliant with the USB 2.0 FS (Full Speed) specifications.
The following table is listing the available signals:
PAD Signal I/O Function Type
COMMENT
B15
USB_D+ I/O USB differential Data (+) 3.3V
C15
USB_D- I/O USB differential Data (-) 3.3V
A13
VUSB AI Power sense for USB presence 5V Accepted range 1.8V to 5V
The USB_DPLUS and USB_DMINUS signals have a clock rate of 12 MHz.
The signal traces should be routed carefully. Trace lengths, number of vias and capacitive
loading should be minimized. The impedance value should be as close as possible to 90 Ohms
differential.
NOTE:
VUSB pin should be disconnected before activating the Power Saving Mode.