Sim Card Interface - Quectel UC20 User Manual

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

3.4. SIM Card Interface

The UC20 EVB has two integrated SIM card interfaces. A suitable SIM card (3V or 1.8V) is required to
start the UMTS module. The 8pin SIM card holder J502 placed on the UC20 EVB is from type Molex, and
the 6pin SIM card holder J503 is not used. Figure 14 shows the simplified interface schematic for J502.
SIM card holder
UC20_EVB_User_Guide
J502
SIM_VDD
SIM_DATA
SIM_CLK
SIM_RST
SIM_GND
SIM_PRESENCE
Figure 14: Simplified SIM Card Interface Schematic
Function
Negative microphone input.
Negative speaker output.
Positive speaker output.
Positive microphone input.
UC20 Mini PCIe
J801
8 10 12 14
GND
Confidential / Released
UMTS/HSPA Module Series
UC20 EVB User Guide
UC20-TE-A
J101
12 10 8 6 4 14
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