Bluetooth; Usb; Sim Interface; Irda Interface - Nokia RM-132 Service Manual & Parts Manual

RM-132; RM-133
System Module Nokia Customer Care
SMPS Clk is 2.4 MHz clock line from RAP to EM ASIC N2300 used for switch mode regulator synchronizing in
active mode. In deep sleep mode, when VCTCXO is off, this signal is set to '0'-state.
BT Clk is 38.4 MHz signal from the RF ASIC to the Bluetooth system.
CLK600 is 600 KHz signal from EM ASIC N2300 to APE VCORE SMPS. The clock source is internal RC oscillator in
EM ASIC (during the power-up sequence) or RAP SMPS Clk divided by 4 after the power-up sequence.

Bluetooth

Bluetooth provides a fully digital link for communication between a master unit and one or more slave units.
The system provides a radio link that offers a high degree of flexibility to support various applications and
product scenarios. Data and control interface for a low power RF module is provided. Data rate is regulated
between the master and the slave.

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.

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 SIM IF is shown in the following figure:
Figure 78 SIM interface

IrDA interface

IrDA specifies a reliable, fully digital peer-to-peer data link between IrDA units at data rates from 9600 bits/
s to 4 Mbits/s. The link is based on the serial transmission of data as pulses of infra red light at the wave
length of 870 nm and angles of +-15 degrees at the range 0 - 50 to 100 cm. Because of these restrictions and
the optical nature of the link, the transmission is not omnidirectional but focused and only reaches a peer
at a limited line-of-sight distance from the transmitter thus not disturbing any other units in the
neighbourhood.
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