I65/I56I HARDWARE DESCRIPTION VERSION
1.00
SIMCLK
Chip card clock, various clock rates can be set in the base
band processor.
SIMVCC
SIM supply voltage from PSU-ASIC
SIMDATA
Serial data line, input and output.
SIMRST
Chip card reset, provided by base band processor.
SIMPRES
Input on the base band processor for detecting a SIM card
tray in the holder. The SIMPRES pin is mandatory for
applications that allow the user to remove the SIM card
during operation. The SIMPRES 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 I56/I56i.
Table 14:
Signals of the SIM interface (board-to-board connector)
5.6.8.2 Requirements for using the SIMPRES pin
According to ISO/IEC 7816-3 the SIM interface must be immediately shut
down once the SIM card is removed during operation. Therefore, the signal at
the SIMPRES pin must go low
before
the SIM card contacts are mechanically
detached from the SIM interface contacts. This shut-down procedure is
particularly required to protect the SIM card as well as the SIM interface of
I56/I56i from damage. 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 operate with I56/I56i and is part of the FALCOM
reference equipment submitted for type approval. Molex ordering number is
91228-0001.
The start-up procedure of module involves a SIM card initialization performed
within 1 second after getting started. An important issue is whether the
initialization procedure ends up with a high or low level of the SIMPRES
signal:
a) If, during start-up of I56/I56i, the SIMPRES signal on the SIM interface
is high, then the status of the SIM card holder can be recognized each
time the card is inserted or ejected. A low level of SIMPRES indicates
that no SIM card tray is inserted into the holder. In this case, the module
keeps searching, at regular intervals, for the SIM card. Once the SIM
card tray with a SIM card is inserted, SIMPRES is taken high again.
b) If, during start-up of I56/I56i, the SIMPRES signal is low, the module
will also attempt to initialize the SIM card. In this case, the initialization
will only be successful when the card is present. If the SIM card
initialization has been done, but the card is no more operational or
removed, then the module will never search again for a SIM card and
only emergency calls can be made. 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 I56/I56i. It is strongly
recommended to connect the contacts of the SIM card detect switch to
the SIMPRES input and to the SIMVCC output of the module as
illustrated in the sample diagram in figure 6 below.
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 initializing any SIM card that the
This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission.
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