User's Manual

PXS8 Hardware Interface Description
3.5 UICC/SIM/USIM Interface
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PXS8_HD_v03.000 Page 26 of 41 2012-11-30
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3.5 UICC/SIM/USIM Interface
PXS8 has an integrated UICC/SIM/USIM interface compatible with the 3GPP 31.102 and ETSI
102 221. This is wired to the host interface in order to be connected to an external SIM card
holder. Five pads on the SMT application interface are reserved for the SIM interface.
The UICC/SIM/USIM interface supports 3V and 1.8V SIM cards.
The CCIN signal serves to detect whether a tray (with SIM card) is present in the card holder.
Using the CCIN signal is mandatory for compliance with the GSM 11.11 recommendation if the
mechanical design of the host application allows the user to remove the SIM card during oper-
ation. To take advantage of this feature, an appropriate SIM card detect switch is required on
the card holder. For example, this is true for the model supplied by Molex, which has been test-
ed to operate with PXS8 and is part of the Cinterion reference equipment submitted for type
approval. See Chapter 9 for Molex ordering numbers.
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 the SIM card during operation. In
this case, the application must restart PXS8.
Table 9: Signals of the SIM interface (SMT application interface)
Signal Description
GND Ground connection for SIM. Optionally a separate SIM ground line using e.g., pad N11 may
be used to improve EMC.
CCCLK Chipcard clock
CCVCC SIM supply voltage.
CCIO Serial data line, input and output.
CCRST Chipcard reset
CCIN Input on the baseband processor for detecting a SIM card tray in the holder. If the SIM is
removed during operation the SIM interface is shut down immediately to prevent destruc-
tion of the SIM. The CCIN signal is active low.
The CCIN signal is mandatory for applications that allow the user to remove the SIM card
during operation.
The CCIN signal is solely intended for use with a SIM card. It must not be used for any other
purposes. Failure to comply with this requirement may invalidate the type approval of
PXS8.