Usb Interface - Quectel LTE-A Module Series Hardware Design

3.7. USB Interface

EM120R-GL&EM160R-GL provide 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 sentences output, software debugging, firmware
upgrade and voice over USB*.
The following table shows the pin definition of USB interface.
Table 11: Pin Definition of USB Interface
Pin No. Pin Name I/O
7 USB_DP AI/AO
9 USB_DM AI/AO
29 USB_SS_TX_M AO
31 USB_SS_TX_P AO
35 USB_SS_RX_M AI
37 USB_SS_RX_P AI
For more details about the USB 3.0 & 2.0 specifications, visit http://www.usb.org/home.
EM120R-GL&EM160R-GL_Hardware_Design
EM120R-GL&EM160R-GL Hardware Design
Description
USB 2.0 differential data bus
(+)
USB 2.0 differential data bus
(-)
USB 3.0 transmit data (-)
USB 3.0 transmit data (+)
USB 3.0 receive data (-)
USB 3.0 receive data (+)
LTE-A Module Series
Comment
Require differential impedance
of 90 Ω
Require differential impedance
of 90 Ω
Require differential impedance
of 90 Ω
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