User Guide

The interface between BRF 6150 and Nokia BB assumes that all higher layers above the HCI (host controller

interface) are implemented in Nokia BB and all other layers (BB, Link Manager, Link Control, and component

RF) below the HCI are implemented in BRF 6150.

Clock signals

BRF 6150 requires a system clock, which it uses to derive all its internal timing. The clock may be sinusoidal

or square and the frequency tolerance is +/-20 ppm. The external TCXO clock oscillator is used for the system

clock with a sinusoidal output.

WLAN

STMicroelectronics STLC4550 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.

WLAN BB/MAC

The baseband chip implements OFDM/CCK digital baseband processor and ARM9-based MAC with internal

SRAM memories.

Regulators

Switching stepdown regulator generates the MAC/BB digital core supply at 1.2 V.

Two separate LDOs at 1.8 V output supply the VCO and the transceiver. The main 1.8 V supply is used for

transceiver analog parts, ADC/DAC and digital circuits inside the transceiver.

RM-208

System Module Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 9 –15