Quectel UMTS&LTE EVB - USB Interface (J801)

UMTS/HSPA/LTE Module Series
UMTS&LTE EVB User Guide
UMTS&LTE_EVB_User_Guide Confidential / Released 21 / 44
4.4. USB Interface (J801)
Quectel UMTS&LTE module provides a USB interface which complies with USB 2.0 standard for
high-speed (480Mbps), full-speed (12Mbps) and low-speed (1.5Mbps) functions. 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 UMTS&LTE 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 power supply for
EVB
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
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