Gemalto M2M GmbH MC56 User Manual
MC55/56 Hardware Interface Description
Confidential / Preliminary
Confidential / Preliminary
s
MC55/56_hd_v03.00
Page 58 of 104
16.08.2005
3.11 SIM
interface
The baseband processor has an integrated SIM interface compatible with the ISO 7816 IC
Card standard. This is wired to the host interface (board-to-board connector) 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 CCIN pin serves to detect whether a tray (with SIM card) is present in the card holder.
Using the CCIN pin 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
operation. See Chapter 3.11.1 for details.
Card standard. This is wired to the host interface (board-to-board connector) 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 CCIN pin serves to detect whether a tray (with SIM card) is present in the card holder.
Using the CCIN pin 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
operation. See Chapter 3.11.1 for details.
Table 15: Signals of the SIM interface (board-to-board connector)
Signal
Description
CCGND Separate ground connection for SIM card to improve EMC.
CCCLK
Chipcard clock, various clock rates can be set in the baseband processor.
CCVCC
SIM supply voltage from PSU-ASIC
CCIO
Serial data line, input and output.
CCRST
Chipcard reset, provided by baseband processor.
CCIN
Input on the baseband processor for detecting a SIM card tray in the holder.
The CCIN pin is mandatory for applications that allow the user to remove the SIM card
during operation.
during 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
MC55/56.
purposes. Failure to comply with this requirement may invalidate the type approval of
MC55/56.
It is recommended that the total cable length between the board-to-board connector pins on
MC55/56 and the pins of the SIM card holder does not exceed 200 mm in order to meet the
specifications of 3GPP TS 51.010-1 and to satisfy the requirements of EMC compliance.
To avoid possible cross-talk from the CCCLK signal to the CCIO signal be careful that both
lines are not placed closely next to each other. A useful approach is using the CCGND line to
shield the CCIO line from the CCCLK line.