CS4622

The CS4622/24 is a high performance pin-compatible upgrade to the 128-pin CS4610C PCI audio accelerator. With the added legacy compatibility modes the CS4622/24 enables real mode DOS compatible PCI-only audio subsystems.

CS4622, combined with application and driver software, provides a complete system solution for hardware acceleration of Windows 95^® Direct- Sound^®, DirectSound3D^®, DirectInput, and Wavetable Synthesis. WDM drivers provide support for both Windows 98 and Windows NT 5.0.

The CS4622/24 is based on the Cirrus Logic CrystalClear Stream Processor (SP) DSP core. The SP core is optimized for digital audio processing, and is powerful enough to handle complex signal processing tasks such as Dolby Digital AC-3 decoding (CS4622 only) with ease. The SP core is supported by a bus mastering PCI interface and a built-in dedicated DMA engine with hardware scatter-gather support. These support functions ensure extremely efficient transfer of audio data streams to and from host-based memory buffers, providing a system solution with maximum performance and minimal host CPU loading.

The all-digital CS4622/24 supports a variety of audio I/O configurations including direct connection to the CrystalClear CS4297 AC '97 Codec. A secondary AC '97 2.0 interface provides support for multi-channel and digital docking solutions. Added extended I/O supports DAA control for modem applications.

CS4622 Consumer Digital input and output (S/PDIF) interfaces support both PCM and compressed 5.1 digital data formats.

PC/PCI, DDMA, and CrystalClear Legacy support provide PCI-only legacy games compatibility