User's Manual

page 12/51
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User Manual 2012/06/28
3.2 SIM CARD
3.2.1 Internal SIM card
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module embeds an IC SIM Card as an optional hardware feature (MFF2 format according to ETSI
standard).
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To get information about internal IC SIM Card option, please contact SAGEMCOM.
3.2.2 External SIM card connection
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module provides also external SIM interface.
Figure 2: Typical SIM schematic
Figure 3: SIM card signals
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Decoupling capacitors must be added on SIM_CLK, SIM_RST, SIM_VCC and SIM_DATA signals as
close as possible to the SIM card connector to avoid EMC issues and in order to pass the SIM card
approval tests.
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SIM_VCC must be used only for the SIM card.
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Use ESD protection components to protect SIM card and module I/Os against Electrostatic Discharges.
ESD components must be placed as close as possible to the SIM. The following schematic shows how to