GE9
GE9
GE9
GE910 Hardware User Guide
10 Hardware User Guide
10 Hardware User Guide
10 Hardware User Guide
1vv0300962 Rev.4 2012-06-25
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 45 of 73
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 specifications.
The following table is listing the available signals:
PAD
Signal
I/O
Function
Type
B15
USB_D+
I/O
USB differential Data (+)
3.3V
C15
USB_D-
I/O
USB differential Data (-)
3.3V
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.
