SIM Interface
26 Module Hardware Description January 1, 2006
SIM Interface
The G24 incorporates a SIM interface, which conforms to the GSM 11.11 and GSM 11.12
standards, that are based on the ISO/IEC 7816 standard. These standards define the electrical,
signaling and protocol specifications of a GSM SIM card.
G24 does not incorporate an on-board SIM card tray for SIM placement. The SIM must be
located on the user application board, external to the G24. The G24 SIM interface includes all the
necessary signals, which are routed to the interface connector, for a direct and complete
connection to an external SIM.
G24 supports dynamic detection of the SIM card, through a dedicated SIM detection signal. G24
will detect a SIM card insertion or removal upon power up or during operation by the transitions
on the SIM_PD_N signal.
SIM Connection
Figure 2-15 illustrates a typical SIM interface connection to G24. This connection type is
implemented on the G24 Developer Board, using an FCI SIM tray, PN 7111S1615A05.
Figure 2-15: G24 SIM Interface
Table 2-5 details the SIM interface signals.
Table 2-5:
SIM Interface Signals
Pin # Signal Name Description
48 SIM_VCC 2.85V Supply to the SIM
44 SIM_RST_N Active low SIM reset signal
52 SIM_DIO Serial input and output data
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