CRD4610-2

` Reference Design for Evaluating the CS4610 & CS423xB PCI/ISA Audio Solution
` 32-Bit, 5V, PCI Add-in Card Includes circuitry for six channel audio output.
` Interfaces with the CrystalClear™ CRD423xB ISA reference design.
` Minimal layout area required, approximately 1.3in2
` Features CS4610 PCI Audio Accelerator
    - PCI Based 300 MIPS (800MOPS), Dual Harvard DSP core with efficient scatter-gather DMA controller.
    - Multiple audio stream mixing and sample rate conversion for 2D and 3D positional audio data.
    - Accelerates DirectSound^®, DirectSound3D^®, Direct-Show^® and Aureal A3D™ API's
    - Dolby^® Digital (AC-3^®) decoding with 5.1 Channel output virtualized on two channels or discrete 6 channel output
    - Concurrent wavetable synthesis with chorus and reverb effects processing

The CRD4610-2 is a 4 layer, PCI 2.1 compliant add-in card. It is designed to be used in conjunction with a CRD423xB-8 ISA CODEC reference design in order to evaluate the CS4610/CS423xB multimedia audio solution. An on-board header and supplied cable allow a digital data link with the ISA based CS423xB-8. The CS423xB provides DOS legacy support and analog input/output while the CS4610 executes hardware acceleration of digital audio mixing and sample rate conversion,3D positional processing, wavetable synthesis and more.

The CS4610 is a PCI 2.1 compliant, audio accelerator.The CS4610's 300 MIPS, dual Harvard based DSP core and efficient scatter-gather DMA controller are optimized for digital audio processing. The standard driver set for the CS4610 includes binary DSP code for 3D audio positioning, support for hardware acceleration of Windows 95^® Direct-
Sound^®, DirectSound3D^®, DirectShow^® and Aureal A3D™ API's, support for Dolby^® Digital (AC-3^®) decoding and a concurrent General MIDI compliant wavetable synthesizer. A host RAM based sample set is also supplied.

The CS4610 may also be used as an AC'97 controller,refer to the CRD4610-1 data sheet for an example of CS4610 operation with the Crystal-Clear™ CS4297 AC-97 CODEC.