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Table 6: Pin Assignment of USIM Card
No.
Pin Name
C1
USIM_VDD
C2
USIM_RST
C3
USIM_CLK
C5
GND
C6
VPP
C7
USIM_DATA
CD1
GND
CD2
USIM_PRESENCE
NOTE
Pin assignment of J504 is the same as that of J503.
3.5. UART Interfaces
Smart EVB offers two UART interfaces, which are main UART port (J901) and debug UART port (J604).
The UART interface J901 is intended for the communication between the module and the host application.
This interface can be used for data transmission and AT command communication. And the debug UART
interface is used for debugging.
The following figure and table show the UART block diagram on Smart EVB and pin assignment of J901.
J901
UART
Smart_EVB_User_Guide
U901
DB9
RS 232
Level Match
RS232
Figure 14: UART Block Diagram
Confidential / Released
I/O
Function
O
USIM/SIM card power
O
USIM/SIM card reset
O
USIM/SIM card clock
Ground
Not connected
I/O
Data line, bi-directional
GND
USIM card detection
I
USIM card detection
U902
3.3V/1.8V
Level Translator
3.3 V
LTE Module Series
Smart EVB User Guide
Module
J101
1.8 V
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