Specifications

Product Technical Specification & Customer Design Guidelines
Interfaces
3.8 SIM Interface
The Subscriber Identification Module can be directly connected to the Q64 through
this dedicated interface.
3.8.1 Features
The SIM interface controls the 1.8V and 3V SIM cards.
It is recommended to add Transient Voltage Suppressor diodes (TVS) on the signal
connected to the SIM socket in order to prevent any Electrostatic Discharge.
TVS diodes with low capacitance (less than 10 pF) must be connected on SIMCLK
and SIMDAT signals to avoid any disturbance during the rising and falling edges.
These types of diodes are mandatory for the Full Type Approval. They shall be placed
close to the SIM socket.
The following references can be used: DALC208SC6 from ST Microelectronics.
5 signals exist:
• SIMVCC: SIM power supply.
• SIMRST: reset.
• SIMCLK: clock.
• SIMDAT: I/O port.
• SIMDET: SIM card detect.
The SIM interface controls a 3V / 1V8 SIM. This interface is fully compliant with GSM
11.11 recommendations concerning SIM functions.
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WA_DEV_Q64_PTS_001-003 January 9, 2009