Q2686 Wavecom, Q2686 Datasheet - Page 67

• Manufacturer Part Number: Q2686
• Description: Wireless CPU
• Manufacturer: Wavecom

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3.22
A 4-wire USB slave interface is available which complies with USB 2.0 protocol
signaling. But it is not compliant with the electrical interface, due to the 5V of
VPAD-USB.
The USB interface signals are VPAD-USB, USB-DP, USB-DM and GND.
USB interface features:
NOTE:
A 5V to 3.3V typ voltage regulator is needed between the external interface
power in line (+5V) and the Wireless CPU
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.
WM_PRJ_Q2686_PTS_001-007
VPAD-USB
USB-DM
USB-DP
•
•
•
•
•
VPAD-USB Input current consumption
Signal
12Mbit/s full-speed transfer rate
3.3V typ compatible
USB Softconnect feature
Download feature is not supported by USB
CDC 1.1 – ACM compliant
VPAD-USB, USB-DP, USB-DM
VPAD-USB, USB-DP, USB-DM
USB 2.0 Interface
number
confidential ©
Pin
52
54
56
Parameter
Parameter
Electrical characteristics of the signals
Pin description of the USB interface
I/O
I/O
I/O
I
VPAD_USB
VPAD_USB
VPAD_USB
I/O type
®
line (VPAD-USB).
Differential data interface negative
Differential data interface positive
Min
Min
3
3
USB Power Supply
Q2686 Wireless CPU
Description
Typ
Typ
3.3
3.3
8
Max
Max
3.6
3.6
Interfaces
Unit
Unit
mA
V
V
March 6, 2007
Page: 66 / 87
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