Integration Manual

AH3-US Hardware Interface Overview
3.5 UICC/SIM/USIM Interface
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AH3-US_HD_v01.000 Page 25 of 42 2012-05-29
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3.5 UICC/SIM/USIM Interface
AH3-US 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. Six pins on the board-to-board connector are reserved for the SIM interface.
The UICC/SIM/USIM interface supports 3V and 1.8V SIM cards. Please refer to Table 27 for
electrical specifications of the UICC/SIM/USIM interface lines depending on whether a 3V or
1.8V SIM card is used.
The CCIN pin serves to detect whether a tray (with SIM card) is present in the card holder. Us-
ing the CCIN pin is mandatory for compliance with the GSM 11.11 recommendation if the me-
chanical design of the host application allows the user to remove the SIM card during operation.
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 tested to op-
erate with AH3-US and is part of the Cinterion reference equipment submitted for type approv-
al. See Chapter 8 for Molex ordering numbers.
Table 9: Signals of the SIM interface (board-to-board connector)
Signal Description
CCGND Separate ground connection for SIM card to improve EMC.
Be sure to use this ground line for the SIM interface rather than any other ground line or
plane on the module.
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 pin is active low.
The CCIN pin is mandatory for applications that allow the user to remove the SIM card dur-
ing operation.
The CCIN pin 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 AH3-
US.