Usb Device Interface - Quectel UC20 User Manual

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UMTS/HSPA Module Series
UC20 EVB User Guide
GND
5V DC source input
Figure 5: Power Interface
You need to use the right DC adapter provided by Quectel, shown as Figure 6.
Inner contact
Outer contact
Figure 6: Power Plug
NOTE
In download mode, USB_VBUS can be used to supply power to UC20-TE-A module. While in other
modes, it is not recommended to use USB_VBUS to supply power due to current limitation.

3.2. USB Device Interface

Both UC20-TE-A and UC20 Mini PCIe provide a USB 2.0 interface which complies with USB 2.0 standard
for high-speed (480Mbps) functions. It is used for AT command, data transmission, firmware upgrade and
GNSS NMEA output.
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