SIM interface
The phone has a SIM (Subscriber Identification Module) interface including a SIM connector.
The SIM interface consists of an internal interface between RAPU and EM ASIC (N2200), and an external
interface between EM ASIC and SIM contacts.
Figure 42 SIM interface
As the phone does not have a traditional battery cover due to semi-fixed battery concept, the SIM card can
be removed and inserted without removing the battery. For safe SIM card functionality, a new Puzzle push-
push SIM reader with card detection and removal pre-warning switches is used.
Pre-warning and card detect signals are connected together in the Puzzle layout symbol, so there is only one
switch connection in the schematics symbol. The combined switch signal is connected through an inverter
to Gazoo/Pearl SimDetX input. The following figure shows the principle of SIM circuitry with the Puzzle.
RM-609
System Module
Issue 1
COMPANY CONFIDENTIAL
Page 6 – 15
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