LTE Module Series
M.2 EVB User Guide
M.2_EVB_User_Guide 16 / 37
4
Application Interfaces
This chapter describes the hardware interfaces of M.2 EVB, shown as follows:
⚫
Power interface
⚫
M.2 interface
⚫
USB interface
⚫
Audio interfaces
⚫
(U)SIM interface
It also provides information about button, switches, status indication LEDs and test points to help
customers use the M.2 EVB.
4.1.
Power Interface (J101/J701)
The M.2 EVB can be powered by an external power adapter through connecting with the power jack (J101)
or USB receptacle (J701) on the EVB. The power adapter connects to a step-down converter which can
provide the supply voltage (VBAT) required for operating the EVB and the module.
The following two figures show the simplified power supply schematic and the power interface of the M.2
EVB.
J101
S101
Power supply
Power
switch
Step-down converter
U101
Power supply
for the module
1.8V
3.3V
U103
U102
USB Type-C interface
J701
VBAT
Figure 6: Power Supply for M.2 EVB