Usim Card Interface - Quectel UC20 User Manual

Table 6: Pin Assignment of J602
J401 Pin Pin Name
1 MICN
2 SPKN
3 SPKP
4 MICP

3.4. USIM Card Interface

The UMTS&LTE EVB has a USIM card interface. A suitable USIM card (3V or 1.8V) is required to start the
UMTS&LTE module. Figure 14 shows the simplified interface schematic for J702.
USIM_VDD
USIM_DATA
USIM_CLK
USIM_RST
USIM_PRESENCE
J101
UMTS&LTE_EVB_User_Guide
12
10
8
6
14
Figure 14: Simplified USIM Card Interface Schematic
UMTS/HSPA/LTE Module Series
Function
Negative microphone input
Negative loud speaker output
Positive loud speaker output
Positive microphone input
Push-Push
C1
USIM_VDD
C7
USIM_DATA
C3
USIM_CLK
C2
USIM_RST
CD2
USIM_PRE.
CD1
USIM_GND
GN
D
Confidential / Released
UMTS&LTE EVB User Guide
USIM card holder
J702
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