Multi-Standard 32-Bit Audio Decoder and Programmable DSPs

Designed as an ideal silicon solution for audio/video receivers and DVD receivers, the CS4953xx audio DSP family integrates two programmable 32-bit DSP cores and a DMA engine with a full set of audio peripherals. Feature-rich designs can be easily developed using the Cirrus Audio Software Library, which includes both certified application programs and a modular programming environment for easy customization. The framework includes certified state-of-the-art audio decoders, virtualizers, surround simulators and audio-enhancement algorithms. The CS4953xx, which features Cirrus Logic’s award-winning Intelligent Room Calibration Software for optimization of in-room acoustics, is designed to reduce system costs and development time while providing features and flexibility for competitive system-level solutions. Difficult processing tasks that incorporate Dolby Digital Surround EX, AAC multichannel, DTS-ES 96/24 and THX Ultra2 Cinema can now be accomplished without the expense of external logic or memory. Additionally, the CS4953xx family meets the needs of extensive processing power with twin DSP cores and input/output intensive designs with support for up to 10 input and 16 output channels. The CS4953xx is an excellent Cirrus Logic Audio DSP IC solution for next-generation digital home entertainment products such as audio/video receivers and DVD receivers. Support for home audio applications is through a third party. Please contact your local sales representative for information.



Audio DSPs


  • Powerful 32-bit, dual-core audio DSPs (1,440 MOPS)
  • Multi-standard 32-bit audio decoding with extreme post-processing
  • Cirrus Logic Audio Software Library (3-overlay structure)
  • Dolby® Digital Pro Logic® II, Dolby Digital EX, DTS-ES 96/24™, DTS-ES Discrete 6.1™, DTS-ES Matrix 6.1™, MPEG-2 AAC LC 5.1 Channel
  • Dolby Digital Surround EX, Dolby Pro Logic IIz, DTS Neo:6®, DTS Neural Surround™, SRS Circle Surround®, Cirrus Extended Surround™ Post-Processor
  • Dolby Digital Headphone®, Dolby Digital Virtual Speaker®, SRS Trusurround HD®, DTS Surround Sensation Speaker™, THX® Ultra2, THX Surround EX™, Quadruple Crossover 7.1 Channel Bass Management
  • Cirrus Intelligent Room Calibration™
  • 10-channel, 32-bit serial audio inputs; 16-channel outputs
  • Two main or secondary SPI (serial peripheral interface) or I²C
  • Customer software security keys
  • Large on-chip X, Y and program RAM
  • Supports SDRAM, SRAM, flash memories
  • Dual 192 kHz S/PDIF transmitters
  • Package: 128-pin LQFP; lead-free assembly

Parametric Specifications

Not Recommended for New Designs

Technical Documents

32-bit DSP Assembly Programmer's Guide

Oct 25, 2013, DS795UM11 : 5438 Kb

CS4953xx DSP Family Data Sheet

Feb 10, 2012, DS705F2 : 1220 Kb

CS4953xx Family Hardware User's Manual

Feb 19, 2010, DS732UM10 : 2626 Kb

CS4953x4/CS4970x4 System Designer's Guide

Mar 26, 2013, DS810UM6 : 5667 Kb

CK49x-4953xx/4970x4 User's Manual

Dec 3, 2012, DS898CK7 : 3164 Kb

CRD49530-USB User's Manual

Sep 15, 2008, DS705RD3 : 8344 Kb

Intelligent Room Calibration Product Bulletin

Oct 4, 2004, 0151-1004-PB-LP : 682 Kb


Comprehensive Solutions