Quectel EM06 Series User Manual

LTE-A Module Series
EM06 Series Hardware Design
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3.8. USB Interface
Each EM06 series module provides one integrated Universal Serial Bus (USB) interface which complies
with USB 2.0 specifications and supports high speed (480 Mbps) and full speed (12 Mbps) modes on USB
2.0. The USB interface is used for AT command communication, data transmission, GNSS NMEA
sentences output, software debugging, firmware upgrade and voice over USB*.
The following table shows the pin definition of USB interface.
Table 10: Pin Definition of USB Interface
For more details about the specifications of USB 2.0, please visit this website down below:
https://www.usb.org/document-library/usb-20-specification.
The USB interface is recommended to be reserved for firmware upgrade. The following figure shows a
reference circuit of USB 2.0 interface.
GND
GND
USB_DP
USB_DM
R1
R2
0R
0R
USB_DM
USB_DP
ESD Array
Module
MCU
R3
R4
NM_0R
NM_0R
Test PointsMinimize these stubs
Figure 18: Reference Design of USB 2.0 Interface
Pin Name
Pin No.
I/O
Description
Comment
USB_DP
7
IO
USB 2.0 differential data bus (+)
Require a differential impedance
of 90 Ω
USB_DM
9
IO
USB 2.0 differential data bus (-)

Quectel EM06 Series Specifications

General

Brand	Quectel
Model	EM06 Series
Category	Control Unit
Language	English