User's Manual

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Note d’étude / Technical document : URD1 – 5625.1 – 006 / 69796 Edition 03
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3.1.1 SIM on the Board to Board Connector.
The SIM card connection could be done in two ways:
• Connector with 6 pins without SIM card detection.
• Connector with 8 pins with SIM card detection.
In both cases, decoupling capacitors of 10pF have to be added on SIMCLK, SIMRST, SIMVCC and SIMIO
signals as close as possible to the SIM card connector to avoid EMC issues. Moreover, use ESD protection
components to protect Sim card and module I/Os against Electro Static Discharges. The following schematic
show how to protect the Sim access for 8 pins connector. Apply the same method for a 6 pins connector.
Figure 4
Protections : EMC and ESD components close to the Sim