Usb; Sim Interface - Nokia n80 User Manual

RM-91; RM-92
System Module Nokia Customer Care
Figure 90 FM radio module interface to engine

USB

USB (Universal Serial Bus) provides a wired connectivity between a USB host PC and peripheral devices.
USB is a differential serial bus for USB devices. USB controller (RAP) supports USB specification revision 2.0
with full speed USB (12 Mbps). The device is connected to the USB host through the system connector. The
USB bus is hot plugged capable, which means that USB devices may be plugged in/out at any time.

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 RAP and EM ASIC N2200 and of an external interface
between N2200 and SIM contacts. The main SIM interface functionality is in RAP while N2200 takes care of
power up/down, card detection, ATR (Answer To Reset) counting and level shifting. For N2200 external SIM
IF connections, see section SIM interface connections.
The SIM IF is shown in the following figure:
Figure 91 SIM interface
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