Quectel EP06 Series - USB Interface

LTE-A Module Series
EP06 Series Hardware Design
EP06_Series_Hardware_Design 21 / 56
is applied and sensitive occasion occurs, and should be placed close to the (U)SIM card connector.
3.5. USB Interface
The module provides one integrated Universal Serial Bus (USB) interface which complies with the USB
3.0/2.0 specifications and supports super speed (5 Gbps) on USB 3.0, 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 output, software debugging, firmware upgrade and voice over USB*.
The following table shows the pin definition of USB interface.
Table 7: Pin Definition of USB Interface
For more details about the USB 2.0 & 3.0 specifications, please visit http://www.usb.org/home.
The USB interface is recommended to be reserved for firmware upgrade in customers’ designs. The
following figure shows a reference circuit of USB 2.0 & 3.0 interfaces.
Pin No.
Pin Name
I/O
Power Domain
Description
Comment
36
USB_D-
AI/AO
Compliant with
USB 2.0
standard
specification
USB 2.0 differential data (-)
Require
differential
impedance of 90
Ω
38
USB_D+
AI/AO
USB 2.0 differential data (+)
23
USB3.0_TX-
AO
Compliant with
USB 3.0
standard
specification
USB 3.0 transmit data (-)
Require
differential
impedance of 90
Ω
25
USB3.0_TX+
AO
USB 3.0 transmit data (+)
31
USB3.0_RX-
AI
USB 3.0 receive data (-)
33
USB3.0_RX+
AI
USB 3.0 receive data (+)