Fm Transmitter Module; High-Speed Usb; Cbus Interface - Nokia RM-235 Service Manual

FM transmitter module

The FM transmitter module Si4713 is controlled by I2C from RAPIDO with left and right analog audio input
from the DAC33.

High-speed USB

High-speed USB
The device can transmit and receive USB data at high-speed (480 Mbit/s), full-speed (12 Mbit/s) and low-
speed (1.5Mbit/s). The external interface is the micro-B connector X3300. The interface between D3300 USB
transceiver and micro-B receptacle is the standard USB interface specified in the Universal Serial Bus
specification Rev. 2.0. The USB transfers signal and power over four-wire interface, which carries differential
data, Vbus and GND. Signalling occurs over differential data line D+ and D-. The clock is transmitted encoded
along with the differential data. ESD protection is done with USB ASIP Z3300. VBUS (+5V) is provided by the
host device. The circuit is protected from an overvoltage condition by transistor pair V3300 and reference
zenner diode V3301.

CBUS interface

CBUS is a "main" system control bus in BB5. RAPIDO controls the functionality of EM ASICs AVilma (N2200) and
Betty (N2300) with CBUS.
CBUS is a four-wire half-duplex master-slave interface. In HW51 CBUS clock frequency is 4.39 MHz.
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Figure 47 WLAN module
Figure 48 FM transmitter
COMPANY CONFIDENTIAL
Copyright © 2008 Nokia. All rights reserved.
System module and user interface
RM-235
Issue 1