Fibocom L830-EB-11 - USB Interface; USB Interface Definition; USB Interface Application

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L830-EB-11 Hardware User Manual Page 21 of 39
Figure 3-9 Reset Timing Control
Index
Minimum
Typical
Notes
t
res
20ms
100ms
RESET# signal to pull down time
3.4 USB Interface
The L830 module supports USB 2.0 which is compatible with USB High-Speed (480 Mbit/s) and USB
Full-Speed (12 Mbit/s). For the USB timing and electrical specification of L830 module, please refer to
“Universal Serial Bus Specification 2.0” .
3.4.1 USB Interface Definition
Pin#
Pin Name
I/O
Reset Value
Description
Type
7
USB_D+
I/O
T
USB Data Plus
0.3---3V, USB2.0
9
USB_D-
I/O
T
USB Data Minus
0.3---3V, USB2.0
3.4.2 USB Interface Application
The reference circuit is shown in Figure 3-10: