Dallas Texas Instruments has beefed-up its Aureus family of audio digital signal processing chips, a move that will enable consumer electronics manufacturers to provide more performance and features for applications requiring multi-channel decoding, including audio/video and DVD receivers, home-theater-in-a-box systems (HTIBs), set-top boxes, mini-compos, high-definition televisions (HDTV) and automotive navigation/multimedia systems.
The newest entries are the 300 MHz TMS320DA710 and 250 MHz TMS320DA708. The DA710 is a 1800 MFLOP device while the DA708 is a 1500 MFLOP DSP. The DA7xx family is code compatible with TI’s previous generations of the Aureus family and built upon TI’s 32-bit floating-point TMS32067x DSP architecture.
Each of the devices has 256 KBytes of SRAM, 768 KBytes of ROM and 32 Kbytes of instruction cache. Earlier DA6xx DSPs which have been available since 2002, run at 225 and 250 Mhz and have less on-chip memory.
Architectural enhancements specifically designed for high-performance audio processing enable efficient use of the extensive headroom available on DA7xx devices. New mixed-precision instructions allow for higher quality bass management and equalization algorithms without the performance impact of using double-precision. An audio-optimized Dual Data Movement Accelerator (DMAX) performs efficient non-sequential external memory accesses and circular buffer management, improving the performance of long delay line algorithms, such as reverb. Additionally, the CPU core and memory subsystem were enhanced and the amount of parallel processing was increased, resulting in higher performance in audio applications.
Among the other notable differentiating features of the new units involves their external memory interface and their high-speed interface. The DA710 has a 32-bit external memory interface while the DA708 has a 16-bit EMIF. The DA710 has a high-speed peripheral interface while the DA708 does not.
DA7xx devices are backed by TI’s Audio Software Library, an end-to-end system software solution that includes industry-standard decoders and post-processors from Dolby, DTS, THX and Microsoft. The Performance Audio Software Library is based on TI’s XDAIS algorithm standard, which allows OEMs and third parties to create plug-and-play algorithms. Third parties are supporting the Performance Audio Library, including Audyssey, SRS, Waves and Neural. This enables OEMs to more efficiently develop and customize audio algorithms, getting products to market faster, quickly spinning derivative products by adding new features, and reducing development costs in general.
The DA7xx devices leverage TI’s investment in C6000 tools including the Code Composer Studio IDE and C compiler. Developers can get started today with DA710 and DA708 EVMs from Momentum Data Systems (http://www.mds.com). The EVMs include digital I/O, multi-channel analog I/O and all the other system components required to prototype a typical A/V receiver system.
For more information on TI’s audio solutions, please visit www.ti.com/homeaudio1.
Texas Instruments, 1-800-477-8924