User Guide

SIM interface

The device has one SIM (Subscriber Identification Module) interface. It is only accessible if battery is removed.

The SIM interface consists of an internal interface between RAPIDO and EM ASIC (N2200), and of an external

interface between N2200 and SIM contacts.

The SIM IF is shown in the following figure:

Figure 54 SIM interface

The EM ASIC handles the detection of the SIM card. The detection method is based in the BSI line. Because of

the location of the SIM card, removing the battery causes a quick power down of the SIM IF.

The EM ASIC SIM1 interface supports both 1.8 V and 3.0 V SIM cards. The SIM interface voltage is first 1.8 V

when the SIM card is inserted, and if the card does not response to the ATR a 3 V interface voltage is used.

RM-412; RM-413

System Module and User Interface

Issue 1 COMPANY CONFIDENTIAL Page 6 –17