Motorola A860 Service Manual download pdf (Page 17)

6809485A78-O June 07, 2004 17

Level 2 Service Manual Theory of Operation

Theory of Operation

MSM6300 System Overview

QCT’s MSM6300 solution, part of QCT’s MSM6xxx Mobile Station Modem (MSM™)

family of chipsets and system. The 6300-series chipset supports cellular-cdma2000,

PCS-cdma2000, gpsone position location, EGSM-900, and DCS-1800 handset oper-

ation with direct conversions from RF to baseband using RadioOne Zero-IF archi-

tecture. It is optimized to support voice and multimedia data applications while

enabling CDMA2000 1X and GSM GPRS network benefits. The MSM6300 solution

provides a seamless migration path from 2G to 3G services and applications, and

increases voice capacity for CDMA2000 1X networks. It will also enable CDMA

developers to quickly develop 3G CDMA2000 1X handsets that exceed the specifi-

cations of mobile stations for worldwide cdmaOne™ and 3G 1xMC systems, includ-

ing those based on IS-95A/B,IS-2000 and 3GPP 51.010 standards.

The MSM6300 chipset solution consists of the MSM6300 Baseband processor, direct

conversion RFL6000TM and RFR6000TM receive devices, RTR6300TM RF trans-

ceiver IC, PM6050TM power management device and a compatible power amplifier

device. These devices perform all of the signal processing and power management

in the subscriber unit.

The MSM6300 chipset and system software features radioOne direct conversion

architecture and incorporates a low-power, high-performance RISC microprocessor

core featuring the ARM926EJ-S™ CPU and Jazelle™ accelerator circuit for ad-

vanced Java applications from ARM® Limited. The MSM6100 solution integrates

two, low-power, high-performance QDSP4000™ digital signal processor (DSP)

cores. Use of the ARM926EJ-S™ CPU and QDSP4000 DSP eliminates the need for

the multimedia companion processor(s) normally required for video-based applica-

tions, playing MP3 music files and MIDI synthesizer/CMX functions.

The MSM6300 chipset and system software incorporates the advanced feature set

of QCT’s Wireless Internet Launchpad™ suite of technologies, integrated MPEG-4

video decoding/encoding, MP3 audio decoding, a 2D/3D graphics accelerator for

advanced gaming applications, a Compact Media Extension (CMX™)/MIDI synthe-

sizer, a digital camera interface, an enhanced LCD interface, and JPEG encoding/

decoding.

The MSM6300 solution supports QUALCOMM’s gpsOne™ position location tech-

nology, including standalone mode in which the handset can act as a GPS receiver.

The gpsOne solution, featuring SnapTrack™ technology, offers robust data avail-

ability under the most challenging conditions, whether in concrete-and-steel high-

rises, convention centers, shopping malls, or urban canyons. Using a hybrid

approach that utilizes signals from both the GPS satellite constellation and from

CDMA cell sites, the gpsOne solution enhances location services availability,

accelerates the location determination process and provides better accuracy for

callers, whether during emergency situations or while using GPS-enabled commer-

cial applications. The MSM6300 solution also supports the Wireless Internet

Launchpad’s VectorOne™ compass capability.

The MSM6300 chipset reduces radio bill-of-materials (BOM) by the introduction of

RadioOne RF devices System BOM is further reduced by supporting interfaces to

next generation memories architectures such as; NAND FLASH, Pseudo SRAM

(PSRAM), Page and Burst mode NOR FLASH and low power SDRAM (LP-SDRAM).

QCT provides a complete software suite, Dual-Mode Subscriber (DMSS) software,

for building handsets around the MSM6300 chipset. DMSS software is designed

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