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| BCM2121 (R) GPRS/GSM SINGLE-CHIP BASEBAND PROCESSOR FEATURES * Single 200-pin FBGA device (13 mm x 13 mm) * GSM voice handset capabilities: FR/EFR/AMR/HR * Data capability (one to five slots, up to four RX/4 TX slots) * GPRS (multislot Class 10) up to 84.4 Kbps * HSCSD (multislot Class 10) up to 57.6 Kbps * GSM single slot up to 14.4 Kbps * Multivoltage SIM, PCMCIA, and IrDA compliant interfaces * GSM850, E-GSM900, GSM1800, and GSM1900 bands SUMMARY OF BENEFITS * Comprehensive GPRS/GSM handset software * Layer 2/3 and user interface software * For bar-type and flip-type GPRS/GSM handsets * Multiple color LCD panels (black and white to 65K color) * Polyphonic ringer interface * Multicolored LED notifications/backlight * Type-approved Phase 2+ multiband protocol stack * Fully functional GSM handset user interface * Foreign language fonts, including Chinese * Startup animations, songs, games, and ring tones * Unicode SMS and full EMS messaging * SIM Application Toolkit (SATK) * Fully integrated Layer 1, including all drivers * AT commands (7.05 and 7.07) * Extremely low-power design: 3V I/O and 2V core * Three UART serial ports for data/fax/testing * Flexible RF transceiver control interface: * Integrated PA controller * APC DAC with ramping RAM * Support straight or multiplexed I and Q * Schedule-based programmable serial control * Power/cost-flexible audio circuitry * Noise suppression and echo cancellation for speakerphone and car phone environments * Sidetone/microphone amplification control * High-output speaker driver * Flexible clock rates for processors (0 to 52 MHz) * * * * Phase 2+ supplemental services Error correction: Radio Link Protocol (RLP) Compression: IP header for GPRS and V.42bis in all modes Complete development system available * Real-time clock and alarm GPRS/GSM Handset Terminal Using BCM2121 BCM2121 Protocol Processing, Man-Machine Interface (ARM RISC) Data Terminal Equipment Keypad SIM Display 2 Flash SRAM Display 1 Physical Layer Processing, Speech CODEC, Baseband CODEC (Oak DSP) RF Transceiver OVERVIEW GPRS/GSM Handset Functional Block Diagram BCM2121 Flash SRAM Keypad LCD SIM Card PC/DTE LEDs HandsFree External Memory Interface 32 kHz XTAL RAM ROM Timers PLL MMI Drivers and Interface - IrDA - UARTs - Ringing - Charging - Slow-serial - Speakerphone ARM7TDMI RISC Oak DSP - Signal processing - Speech algorithm - Echo cancellation - Noise suppression Auxiliary Functions ADC MUX Battery Charger 13 MHz - MMI - Services - GSM/GPRS protocol stack - Voice recording - Voice recognition AFC DAC PA Control Hardware Coprocessors GMSK Mod. Digital RF Control ADC DAC Quad Mod. VCO Synth. Down Conv. PA Diplexer Voice Band CODEC DAC Baseband CODEC ADC x Transceiver L N A The BCM2121 GPRS/GSM baseband processor offers a high level of system integration, performance, and features for next-generation handsets and radio cards. The BCM2121 is a single-chip baseband device that is applicable for wireless handsets and speakerphones. The integration of the PA controller and speaker/car phone audio circuitry adds key GPRS handset features while reducing overall system cost. The BCM2121 contains all analog and digital GSM and multislot GPRS baseband processing functions on a single silicon substrate. Interface functions and drivers are integrated to enable auxiliary components such as microphone, speaker, displays, keypad, data terminal equipment, and SIM to connect directly to the chip. A flexible baseband control interface supports a wide range of transceivers including GSM850, E-GSM900, GSM1800, and GSM1900 frequency bands. To accelerate our customers' product development cycle and to enable high-volume manufacturing, the BCM2121 also offers handset system solutions, including: * Complete handset and modem software, evaluation boards, reference designs, and integration support * GSM Certification Forum (GCF) and interoperability testing (IOT) * Worldwide network field testing To further reduce overall component count and BOM cost, the BCM2121 integrates a number of typical PCB circuit functions such as a PA controller, echo cancellation, noise suppression, and hands-free answer sensing. In addition, features such as the peripheral serial bus interface, integrated 1.8V/3V SIM, and multiplexed I and Q channels add flexibility when connecting to other onboard components. On-chip hardware accelerators work in concert with HSCSD and GPRS software to allow user data speeds up to 57.6 Kbps and 84.4 Kbps. In addition to these multislot capabilities, the BCM2121 contains legacy GSM voice circuitry (adding all of the AMR modes) for voice applications. On the ARM, the V.42bis compression yields up to a 4x rate increase for GPRS and HSCSD traffic. The ARM7TDMI processor runs the high-level application software, such as the SATK, WAP browser, voice recognition/recording, and user interface. The processor can interface with various polyphonic ringer chips and control two black and white or color LCD panels for high-end handsets. The Oak DSP performs the GSM physical layer functions, including voice and baseband codecs, speech coding, channel coding and interleaving, and RF interface transceiver control. To minimize power consumption, the Oak DSP uses hardware coprocessors for computationintensive processing functions. Echo cancellation and noise suppression software is also included on the DSP to target speakerphone and other noisy environments. Broadcom(R), the pulse logo, and Connecting everything(R) are trademarks of Broadcom Corporation and/ or its subsidiaries in the United States and certain other countries. All other trademarks mentioned are the property of their respective owners. (R) BROADCOM CORPORATION 16215 Alton Parkway, P.O. Box 57013 Irvine, California 92619-7013 (c) 2003 by BROADCOM CORPORATION. All rights reserved. 2121-PB03-R 11/13/03 Phone: 949-450-8700 Fax: 949-450-8710 E-mail: info@broadcom.com Web: www.broadcom.com |
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