CS4630
CrystalClear SoundFusion PCI Audio Accelerator
Features
Description
The CS4630 is a high performance upgrade to the
CS4624 PCI audio accelerator. With support for legacy
compatibility modes, the CS4630 enables real mode
DOS compatibility within PCI-only audio subsystems.
This device, combined with application and driver
software, provides a complete system solution for
hardware acceleration of Microsoft’s DirectSound,
DirectSound3D, DirectInput, and Wavetable Synthesis.
WDM drivers provide support for both Windows 98 and
Windows 2000 .
l 420 MIPs SLIMD DSP Architecture with
increased internal memory for greater
performance
l Hardware acceleration for Microsoft
DirectSound and DirectSound3D
Positional Audio
l Sensaura™ 3-D, 2 or 4 channel audio
l EAX™ 1.0 enhanced environmental audio
standard
The CS4630 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 Sensaura 3D, 4-channel output, and hardware
wavetable synthesis. 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.
l Unlimited-Voice Wavetable Synthesis with
Effects including DLS support
l Acoustic Echo Cancellation Hardware
Acceleration for NetMeeting
l 10 Band Graphic Equalization
l High Quality Hardware Sample Rate
Conversion (90+ dB Dynamic Range)
l PC/PCI, DDMA, and CrystalClear Legacy
Support (CCLS )
l PCI 2.1 Compliant PCI Interface
l Full duplex, 128 Stream DMA Interface with
ORDERING INFORMATION
CS4630-CM 128-pin MQFP 14x20x2.85 mm
Hardware Scatter/Gather Support
l PCI Power Management (D0 through
D3 ), APM 1.2, and ACPI 1.0
cold
l Power Management Event (PME#)
Generation within D0-D3
cold
l Dual AC ‘97 2.1 Codec Interface
128-Stream
Dual Codec
AC ’97 2.1
Interface
Parameter
RAM
DMA Controller
with Hardware
Scatter/Gather
l Asynchronous Digital Serial
Sample
RAM
Interface (ZV Port)
EGPIO
PC/PCI &
CCLS Legacy
Program
RAM
SLIMD
SP Core
S/PDIF In
S/PDIF Out
l S/PDIF Digital Input and Output
support for PCM and AC3
PCI
Interface
Program
ROM
MPU-401
MIDI Interface
encoded 5.1 Channel Formats
ZV Port
Coefficient
ROM
l DirectInput Joystick and MPU-
Async. Serial
Port Interface
Joystick
Interface
401 MIDI In/Out
l 3.3 V / 2.5 V Power Supply (5 V
tolerant I/O)
l PC 98 and PC 99 Compliant
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Preliminary Product Information
NOV ‘99
DS445PP1
Copyright Cirrus Logic, Inc. 1999
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
(All Rights Reserved)
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