Quectel EG915U-EU - USB and USB_BOOT

LTE Standard Module Series
EG915U-EU_Hardware_Design 40 / 81
4.1.3. Receiver Interface Design
The receiver channel reference circuit is shown in the following figure:
SPK_N
0R
0R
SPK_P
Module
Close to Receiver
NF
33 pF
10 pF
33 pF
Differential
layout
0603
TVS
TVS
0R
0R
Figure 17: Reference Design for Receiver Interface
4.2. USB Interface
EG915U-EU provides one integrated Universal Serial Bus (USB) interface which complies with the USB
2.0 specification and supports full-speed (12 Mbps) and high-speed (480 Mbps) modes. The USB
interface can only serve as a slave device and is used for AT command communication, data transmission,
software debugging and firmware upgrade.
Table 12: Functions of the USB Interface
Functions
Data communication with external AP
Y
AT command communication
Y
Data transmission
Y
GNSS NMEA output
N
Software debugging
Y
Firmware upgrade
Y