User Guide

Discrete power supplies are used to generate 2.8V to BT, 1.5V for the LCD controller voltage, 1.3V/1.5V for

Application processor and 18V for the backlight LEDs.

The device supports both 1.8V/3V SIM cards which are powered by EM ASIC (N2200) / VSIM1. EM ASIC (N2200)

s VSIM2 is used to power RS MMC 1.8V only. USB accessories which needs power from the device are powered

by EM ASIC (N2300) / VOUT.

Because LED driver in EM ASIC (N2300) is not used, the external SMPS is used instead. External LED SMPS is still

controlled by EM ASIC (N2300) and powered by battery voltage.

System power-up

After inserting the main battery, regulators started by HW are enabled. SW checks, if there is some reason to

keep the power on. If not, the system is set to power off state by watchdog. Power up can be caused by the

following reasons:

• Power key is pressed

• Charger is connected

• RTC alarm occurs

• MBUS wake-up

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. The data rate is

regulated between the master and the slave.

The device Bluetooth is based on the TI BRF 6150 BT ASIC.

The UART1 interface handles the transfer of control and data information between the application processor

and the BT system.

The PCM interface is used for audio data transfer between RAP and the BT system.

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.

WLAN

STMicroelectronics STLC4370 implements 802.11b/g WLAN radio for embedded, low-power and small form

factor mobile applications.

RFMD RF5924 Front-End Module (FEM) is a single integrated module. The FEM has integrated b/g power

amplifier, power detector, RX balun and TX filtering.

RM-10;RM-24

Nokia Customer Care System Module

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