UMTS/HSPA/LTE Module Series
UMTS<E EVB User Guide
UMTS<E_EVB_User_Guide Confidential / Released 21 / 32
The USIM card detection function of UMTS<E module is disabled by default.
3.5. UART Interface
UMTS<E EVB offers two UART interfaces, COM1 (Main UART port) and COM2 (Debug UART port).
The UART interface COM1 of the UMTS<E EVB is intended for the communication between the
module and the host application. This interface can be used for data transmission and AT communication.
The following figure shows the UART block diagram on UMTS<E EVB.
J101
Module
RS232
Level Match
3.0V/1.8V
Level Translator
COM1
DB9
J401
RS232 3.0V
1.8V
U403
U401
Figure 16: UART Block Diagram
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