CS4630-CM

Audio Special Purpose Overview

The CS4630-CM is a high-performance PCI audio accelerator from Cirrus Logic Inc., designed for hardware acceleration of Microsoft DirectSound, DirectSound3D, and Wavetable Synthesis. It features a 420 MIPS SLIMD DSP architecture with increased internal memory. The device supports legacy compatibility modes, including real-mode DOS compatibility within PCI-only subsystems. Packaged in a 128-MQFP (14x20 mm) surface-mount case, it integrates dual AC '97 codec interfaces, S/PDIF digital I/O, and a high-quality hardware sample rate converter.

Audio Special Purpose Feature Summary

• 420 MIPS SLIMD™ DSP Architecture with increased internal memory
• Hardware acceleration for Microsoft DirectSound® and DirectSound3D® Positional Audio
• Sensaura™ 3-D, 2 or 4 channel audio and EAX™ 1.0 enhanced environmental audio standard
• Unlimited-Voice Wavetable Synthesis with Effects including DLS support
• Acoustic Echo Cancellation Hardware Acceleration for NetMeeting™
• High Quality Hardware Sample Rate Conversion (90+ dB Dynamic Range)
• Dual AC ‘97 2.1 Codec Interface
• S/PDIF Digital Input and Output support for PCM and AC3 encoded 5.1 Channel Formats
• PCI 2.1 Compliant PCI Interface with Power Management (D0 through D3cold)

Audio Special Purpose Applications

• PC/PCI audio subsystems requiring hardware acceleration for Windows 98/2000
• Legacy DOS compatibility in modern PCI-only audio environments
• Multimedia PCs supporting DirectInput Joystick and MPU-401 MIDI

Audio Special Purpose Part Context

The CS4630 serves as a high-performance upgrade to the CS4624 PCI audio accelerator. It enables real-mode DOS compatibility within modern PCI-only audio subsystems by combining application and driver software for a complete system solution.