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CS48500 Family – Cost-effective Multichannel 32-Bit DSP with Integrated Premium Audio Interfacing & Conversion

Cirrus Logic CS485xx Family diagram
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Differentiating from Cirrus Logic’s well-known high end multi-standard, multichannel decoders, this new CS485xx family is based on the same high-performance 32-bit fixed point Digital Signal Processor core, but instead is equipped with much less memory, tailoring it for more cost-effective applications associated with multi-channel and virtual-channel sound enhancements.

The CS48520, CS48540 and CS48560 ICs provide a cost effective and simple-to-design audio post-processing solution, delivering an extensive selection of enhanced audio features to maximize the listening experience. Sporting up to 12 channels of audio I/O, onboard sample rate convertor and no need for external memory, the new CS48500 family makes very compact designs possible.

The CS48520/40/60 is programmed using the Cirrus Logic proprietary GUI software development tool called DSP Composer™. The audio processing chain can be designed using a drag and drop interface, simplifying the design process and rendering fast software tweaks. Configuration happens through the SPI™/I2C® serial port and the firmware may be loaded from the internal memory or it may be downloaded through the serial control port.

CS485xx Family Features

  • Multichannel 32-bit audio post processing at 150 MHz with dual MACs (300M  MACs/Sec)
  • CS48520 supports 4 channel 32-bit PCM I/O
  • CS48540 supports 8 channel 32-bit PCM I/O
  • CS48560 supports 12 channel 32-bit PCM I/O
  • 192 kHz S/PDIF Tx
  • SPI™/I2C® serial control port
  • Low-power standby: 260μW
  • Large on-chip RAM & ROM
  • Programmable GUI software tool
  • Licensed third party audio processing algorithms in ROM, plus extensive library of Cirrus proprietary downloadable and customizable firmware (inquire for full list of available algorithms)

CS485xx Family Key Benefits

  • Easy to design – most standard processing features & some 3rd party algorithms in ROM
  • DSP Composer GUI simplifies programming
  • High performance-to-cost ratio
  • No external memory needed
  • Complete PCM processor in a single IC:
  • Matrix decoders
  • Automatic volume leveling/modeling
  • Speaker and headphone virtualizers
  • Bass management
  • Speaker and cabinet tuning
  • Automatic speaker/room EQ
  • Lip-sync delay