LTE Standard Module Series
4 Application Interfaces
4.1. USB Interface
EC200A series 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. The following table shows the pin definition of USB interface.
Table 11: Functions of the USB Interface
Pin definition of the USB interface is here as follows:
Table 12: Pin Definition of USB Interface
For more details about the USB 2.0 specifications, please visit http://www.usb.org/home.
Typ. 5.0 V.
If unused, keep it open.
USB differential data (+)
90 Ω differential
impedance. USB 2.0
compliant.
If unused, keep it open.
USB differential data (-)
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