™ GA3220 Programmable Signal Processing Platform for Hearing Instruments OVERVIEW GA3220 is a system-in-a-package (SiP) signal processing platform specifically designed for hearing instruments which require high precision processing and ultra low power consumption. The platform delivers high-performance audio GA3220 processing with superior power efficiency enabling the implementation of advanced hearing instrument algorithms such as next generation adaptive noise reduction and environmental classification algorithms. The GA3220 platform is comprised of three chips as illustrated in Figure1. The GC5002 DSP chip contains both programmable instruction set DSP cores and high performance hardwired co-processors. It provides extensive computational capability without compromising battery life. The unique architecture of the GC5002 simultaneously offers the flexibility of a programmable platform and the performance of hard-wired design. The chip utilizes a distributed and re-configurable architecture which enables Figure 1 hardware scalability and ensures minimum power consumption while implementing advanced signal processing algorithms. BENEFITS • The most versatile SiP platform - fits into any shell size from CIC to BTE • Single programmable platform enables product implementation for different market segments • Reduced product development and manufacturing costs for OEMs through product consolidation • Improved time-to-market and fast response to changing market needs • Re-configurable and distributed processing architecture allows easy product enhancements and provides full computational power scalability • Flexible architecture enables easy integration of a third party IP-block (e.g., proprietary feedback cancellation or directional processing to the system) • Hearing instrument-centric instruction set based DSP allows OEMs to implement any proprietary algorithms and provide extensive processing power to support any leading-edge algorithm • 0.13u silicon technology facilitates high- The second chip, GC5055, is a programmable high fidelity audio Codec designed specifically for digital hearing instrument applications. This chip provides industry-standard interfaces for transducers, switches, volume controls and programmer boxes. It also provides serial communication ports for interfacing with third-party DSP chips and serial EEPROMs. end product implementation without sacrificing good battery life • State of the art analog chip design and high precision digital processing ensures the highest sound quality The GA3220 platform employs ThinSTAX™ advanced packaging technology which makes it incredibly compact and suitable for CIC instruments. • Fully integrated development environment (GUIDE) provides fast and easy development continued on other side SYSTEM OVERVIEW MUX ADC ADC FEATURES continued PreProcessing Block PostProcessing Block - Task specific hardware accelerators for DAC common audio processing tasks (FFT/IFFT, Feedback Canceller, OCL and Time Domain Input Cluster µDSP FBC Output Cluster µDSP Filter Bank ) OCL EEPROM - 10.7K words of data RAM and 7.7K words of program RAM. Feng Feng Feng Feng - Programmable on-chip clock frequency Interfaces MDSP (controller) between 2MHz and 10MHz. I2S SPI PCM µDSP µDSP SDA FFT/IFFT Time Domain Cluster Frequency Domain Cluster - Power saving sleep modes Debug GPIO TDFB - 20 bit audio precision - General Purpose I/O port for application development or custom applications - debug port supports in-circuit emulation (ICE) • Hi-Fidelity GC5055 CODEC Chip - 0.18u technology FEATURES - Dual A/Ds, D/A • CIC size package (hybrid size < 215x124x69 mil) - 95 dB input dynamic range • Ultra low power architecture - 83 dB output dynamic range • 256K SPI EEPROM system memory - Programmable sampling between 8-48kHz • Complete integrated development kit (GUIDE) supports - FRONTWAVE™ Directional processing development from concept to final product • Programmable and re-configurable GC5002 DSP chip - Four analog inputs (Fmic, Rmic, Tcoil, Direct Audio Input-DAI) - Leading edge 0.13µ technology - Internal/External Volume control - As low as 0.04mW/MMAC average power consumption - AGC-O and tone generation for the programmable blocks (µDSP and filter engines) - Drives zero-bias 2-terminal receivers - 42MIPS processing power at 2MHz - A programmable main DSP for system configuration and control - Four programmable, dual-MAC µDSPs for numerically intensive operations - Four custom programmable filter engines optimized for digital filtering operations [email protected] w w w. g e n n u m . c o m tel: +1 (905) 632-2996 fax: +1 (905) 632-2814 © 2004 Gennum Corporation. Printed in Canada