User Guide

SIM/USIM

The device has one SIM (Subscriber Identification Module) interface and the SIM card locates under the battery.

SIM interface consists of internal interface between RAP and EM ASIC (N2200) and an external interface

between Retu and SIM contacts.

SIM interface functionality is located in RAP while EM ASIC (N2200) takes care of power up/down, card

detection, ATR counting and level shifting. EM ASIC (N2200) external SIM IF connections and electrical

characteristics between ASICs are shown in the picture.

EM ASIC (N2200) handles SIM card detection and the detection method is based on battery removal trough

the BSI line.

RM-170; RM-171

System Module Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 9 –15