Technical information

SIM Interface
28 G30 - Module Hardware Description December 15, 2009
External SIM Card
G30 does not incorporate an on-board SIM card tray for SIM placement. The external SIM must
be located on the user application board, external to the G30. The G30 SIM interface includes all
the necessary signals, which are routed to the interface connector, for a direct and complete
connection to an external SIM.
G30 supports dynamic detection of the SIM card, through a dedicated SIM detection signal. G30
will detect a SIM card insertion or removal upon power up or during operation by the transitions
on the SIM_PD_N signal.
External SIM Connection
Figure 2-12 illustrates a typical external SIM interface connection to G30. This connection type is
implemented on the G30 Developer Board, using an FCI SIM tray, PN 7111S1615A05.
Figure 2-12: G30 External SIM Interface
External SIM Design Guidelines
The SIM interface and signals design is extremely important for proper operation of G30 and the
SIM card. There are several design guidelines that must be followed to achieve a robust and
stable design that meets the required standards and regulations.
• Using the SIM detection signal, SIM_PD_N, is mandatory in case the SIM card is accessible
to the user and may be removed during G30 operation. To avoid any damage to the SIM or
G30, the SIM interface signals must be deactivated before the SIM card contacts are
mechanically removed from the SIM tray contacts. Therefore, the SIM_PD_N detection
signal must be disabled before the SIM is removed from its tray.
• The SIM should be located, and its signals should be routed, away from any possible EMI
sources, such as the RF antenna and digital switching signals.
• The SIM interface signals length should not exceed 100 mm between the G30 interface
connector and the SIM tray. This is to meet with EMC regulations and improve signal
integrity.