Figure 25 USB interface
The phone supports full speed (12 Mb/s) in device mode.
Charger interface
The charger interface is a 2 mm Dynamo charger plug. Older chargers with a 3.5 mm plug are supported via
the charger adapter cable CA-44.
Charging is controlled by PEARL_J (N2200). Additional external components are needed for EMC purposes,
reverse polarity and transient protection of the input to the baseband module.
Figure 26 Charger interface
Bluetooth
Bluetooth provides a fully digital link for communication between a master unit (the phone) and one or more
slave units (e.g. a wireless headset). Data and control interface for a low power RF module is provided by the
module.
The Bluetooth is physically integrated with the FM radio into one single module. From a functional point of
view they, however, have nothing in common.
RM-721; RM-722
System Module
Page 5 – 12 COMPANY CONFIDENTIAL Issue 1
Copyright © 2011 Nokia. All rights reserved.
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