UMTS/HSPA/LTE Module Series
UMTS<E EVB User Guide
UMTS<E_EVB_User_Guide 21 / 44
4.4. USB Interface (J801)
Quectel UMTS<E modules provide a USB interface which complies with USB 2.0 standard and
supports high-speed (480Mbps), full-speed (12Mbps) and low-speed (1.5Mbps) modes. The interface is
used for AT command communication, data transmission, firmware upgrade and GNSS NEMA output.
The UMTS<E EVB provides a Micro-USB interface J801 for connection with a host device. The USB
data lines USB_DP and USB_DM are connected directly to the module. The USB_VBUS line can be used
for USB connection detection and EVB power supply.
The following figure is a reference circuit design for the USB device interface.
Figure 11: Reference Circuit Design for USB Device Interface
Table 4: Pin Definition of J801
Pin No.
Pin Name
Function
1
USB_VBUS
Used for USB connection detection and
EVB power supply
2
USB_DM
USB serial differential bus (minus)
3
USB_DP
USB serial differential bus (positive)
4
USB_ID
USB ID bus for host or device
5
GND
GND for USB interface
