Usb Interface (J801) - Quectel UMTS Module Series User Manual

4.4. USB Interface (J801)

Quectel UMTS&LTE 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&LTE 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
1 USB_VBUS
2 USB_DM
3 USB_DP
4 USB_ID
5 GND
UMTS&LTE_EVB_User_Guide
Function
Used for USB connection detection and EVB power supply
USB serial differential bus (minus)
USB serial differential bus (positive)
USB ID bus for host or device
GND for USB interface
UMTS/HSPA/LTE Module Series
UMTS&LTE EVB User Guide
21 / 44