User's Manual

L720 EVB User Manual
Copyright© Shanghai Mobiletek Communication Ltd 8
2 Abstract
L720 Evaluation Board (silkscreen L506_EVB ) Is specially designed for developing L720 serial module，
To help developers to develop, debug, test L720 series 4 GIoT LTE module. Below and mark shows L720
the main functions of the development board. In this article, we will in the subsequent chapters on the
function of each part is described.
Figure 2-1: L720 EVB global graph
The above picture description:
1. The L720 USB port is on the EPI board, not on the EVB.
2. The power switch S2. This switch S2 can switch the corresponding power input way, Choose an
external power adapter or direct bonding wire by external input 3.8 V dc power supply.
3. DB9 UART is serial port for module AT instruction, same as USB uart.
4. USB for Debug UART is used for user to retrieve the Debug information.
5. To facilitate the user's use, maintain a minimum system and we provide a power interface on the L720
EPI board.