FM radio
The second part of the BTHFM module contains the FM radio.
The antenna for the FM radio is provided by plugging in an external wired headset to the system connector.
It is not possible to listen to the FM radio without a wired headset connected. The FM radio is controlled by
I2C commands coming from RAP. The audio output of the FM radio is fed to the headset via the EM ASIC N2200,
so the rest of the phone can sleep while the FM radio is active.
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 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.
RM-180
System Module Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 9 –15
Copyright © 2006 Nokia. All rights reserved.
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