Gemalto M2M GmbH BGS5 Manuel D’Utilisation

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3.11 SIM Interface

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EHSxT_BGS5T_HIO_v01

2014-02-26

Confidential / Preliminary

Page 30 of 41

The SIM interface is intended for 1.8V and 3V SIM cards in accordance with GSM 11.12 Phase 
2. The card holder is a five wire interface according to GSM 11.11. A sixth pin has been added 
to detect whether or not a SIM card is inserted. 

Figure 7:  SIM interface

The SIM - with the circuit side facing upwards - is inserted by gently pushing it into the SIM card 
holder until it snaps hold. It is now protected from accidental removal. The SIM can be removed 
from the card holder by using a flat object such as a screwdriver to carefully press the inserted 
SIM until it snaps out again.

All signals of the SIM interface are protected from electrostatic discharge with spark gaps to 
GND and clamp diodes to 1.8V resp. 2.9V and GND.

Removing and inserting the SIM card during operation requires the software to be reinitialized. 
Therefore, after reinserting the SIM card it is necessary to restart Java Terminals. 

Note: No guarantee can be given, nor any liability accepted, if loss of data is encountered after 
removing the SIM card during operation. Also, no guarantee can be given for properly initializ-
ing any SIM card that the user inserts after having removed a SIM card during operation. In this 
case, the application must restart the Java Terminals.

SIM inserted