Quectel UMTS&LTE EVB User Manual

UMTS/HSPA/LTE Module Series
UMTS&LTE EVB User Guide
UMTS&LTE_EVB_User_Guide Confidential / Released 17 / 44
4 Interface Application
This chapter describes the hardware interfaces of UMTS&LTE EVB, shown as follows:
 Power interface
 UMTS&LTE TE-A interface
 Wi-Fi & Ethernet TE-A interface
 USB interface
 Audio interfaces
 USIM card interface
 SD card interface
 UART interfaces
It also provides information about the buttons, switch, status indication LEDs and test points to help
customers use the UMTS&LTE EVB.
4.1. Power Interface (J201/J801)
The UMTS&LTE EVB can be powered by an external power adapter through connecting with the power
jack (J201) or USB receptacle (J801) 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 Quectel
UMTS&LTE EVB.
J201
S201
Power
supply
Power
switch
Step-down converter
U201
TPS54319
J103
VBAT
Power supply for
UMTS&LTE module
1.8V
3.3V
U301
LDO
U303
LDO
J801
USB
interface
2.85V
U302
LDO
Power supply for
Wi-Fi module
Power supply for
SD Card
Figure 5: Power Supply for UMTS&LTE EVB
Quectel
Confidential

Quectel UMTS&LTE EVB Specifications

General

Brand	Quectel
Model	UMTS&LTE EVB
Category	Motherboard
Language	English