Quectel UC20

UMTS/HSPA/LTE Module Series
UMTS&LTE EVB User Guide
UMTS&LTE_EVB_User_Guide Confidential / Released 9 / 32
2.2. System Overview
Power swich
Power supply
USB
PWRKEY
RESET
PWRDWN_N
Audio interface
SIM card interface
SD card interface
5V to 3.8V DCDC
Status LEDs
COM2 (DEBUG)
ALC5616
NCP2823
SPK_N
SPK_P
TXS0108
SP3238
SP3238
3.8V Power
3.8V Power
J403
COM1 (MAIN)
ON
OFF
Figure 1: System Overview
2.3. Interface Overview
Table 2: Interfaces of UMTS&LTE EVB
Interface
Reference
Number
Description
Power Supply
J201
(bottom side)
The power jack on the EVB board. Supply voltage typically
+5V
J801
USB_VBUS supply +5V voltage
Power Switch
S201
Control power supply VBAT ON/OFF
PWRKEY
S302
PWRKEY push button
It’s used to turn on/off the UMTS&LTE module
Quectel
Confidential