4622-4pi.fm Page -1 Tuesday, July 7, 1998 1:21 PM
CS4622/24
CrystalClear™
SoundFusion™ PCI
Audio Accelerator
The following information is based on the
technical datasheet:
CS4622/24 DS293PP2 JUN ’98
Preliminary Product Bulletin
Please contact Cirrus Logic, Multimedia
Audio support for further information.
3&08/7,0(',$$8',2
352'8&7,1)250$7,21
Copyright © Cirrus Logic, Inc. 1998
(All Rights Reserved)
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CS4622/24
Features
CrystalClear™ SoundFusion™ PCI Audio Accelerator
Features
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300/255 MIPs SLIMD™ DSP Architecture
DirectX™ 5.0 3D Positional Audio
Fat Labs Approved 64-Voice Wavetable Synthesis with Effects
NetMeeting™ AEC Hardware Acceleration
Dolby® Digital AC-3® (CS4622)
High Quality Hardware Sample Rate Conversion (90+ dB
Dynamic Range)
PC/PCI Legacy Support
DDMA Legacy Support
CrystalClear Legacy Support (CCLS™)
PCI 2.1 Compliant PCI Interface
96 Stream DMA Interface with Hardware Scatter/Gather
Support
PCI Power Management (D0 through D3 Hot), APM 1.2, and
ACPI 1.0 Support
AC ‘97 2.0 Link Codec Interface
Secondary AC ‘97 1.0/2.0 Link Codec Interface for MultiChannel and Digital Docking Support
Asynchronous Digital Serial Interface (ZV Port)
S/PDIF Digital Input and Output Interfaces supporting both
PCM and Dolby Digital 5.1 Formats
MPU-401 MIDI Input/Output Interface
3.3 V Power Supply (5 V tolerant I/O)
Description
The CS4622/24 is a high performance pin-compatible upgrade to the 128-pin
CS4610C PCI audio accelerator. With the added legacy compatibility modes,
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CS4622/24
Description
the CS4622/24 enables real mode DOS compatible PCI-only audio subsystems. This device, combined with application and driver software, provides
a complete system solution for hardware acceleration of Windows 95® DirectSound®, 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.
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.
96-Stream
DMA Controller
with Hardware
Scatter/Gather
PCI Bus
PCI
Interface
PC/PCI &
CCLS Legacy
AC ’97 2.0
Interface
Sample
RAM
AC ’97 2.0
Interface
Program
RAM
SLIMD
SP Core
S/PDIF In
S/PDIF Out
MPU-401
MIDI Interface
Joystick
Interface
2
Parameter
RAM
Program
ROM
Coefficient
ROM
ZV Port
Async. Modem
Interface
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CS4622/24
Overview
Overview
The CS4622/24 is a high performance audio accelerator DSP for the PCI bus.
This device, combined with application and driver software, provides a complete system solution for cost effective acceleration of Windows DirectSound,
Direct-Sound3D, DirectInput, MIDI playback via Wavetable Synthesis with
reverberation and chorus effects processing, and more. The CS4622/24 is compatible with the CS4610C with the following added features:
- Primary AC ‘97 Interface now 2.0 compatible
- 2nd AC ‘97 Interface (also 2.0 compliant)
- CrystalClear Legacy Support
- PC/PCI Legacy Support
- DDMA Legacy Support
- PCI Power Management Event Support
- ZV Port Asynchronous Serial Port
- 2nd Asynchronous Serial Port
- 9 Extended GPIO pins for Modem Support
- Consumer Digital (S/PDIF) Input and Output
The CS4622 is a high-performance, full-featured version of the SoundFusion
audio accelerator. The CS4624 is a reduced-cost version of the CS4622. The
CS4624 has a lower maximum clock speed and does not support AC-3. Please
refer to the OEM Software Reference Manual for more details.
FAQs
1)
A:
What is the difference between the two devices?
The CS4622 offers the capability to decode Dolby Digital (AC3), and the
CS4624 does not.
2)
A:
How is the Dolby License obtained?
Cirrus Logic can only ship devices and software implementing Dolby
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CS4622/24
Ordering Information
technology to Dolby certified customers. A Dolby System License certification can be obtained by faxing a written request to Dolby Licensing
Corporation, at (415) 863-1373. This request should include a description
of the intended application and should be marked "Request for Dolby
License Application".
3)
A:
4)
A:
How are these devices different than the other Crystal PCI audio products
(CS4280 and CS4614)?
The CS4280 does not offer DSP acceleration for wavetable synthesis and
3D sound, using the host processor instead. The CS4614 offers DSP processing, but not digital I/O (SPDIF) or ZVPort support.
Which markets would the CS4622 and CS4624 serve?
Manufacturers of PC motherboards, portables, and PCI audio cards
would use the CS4622 and CS4624, where the performance advantages
of DSP processing are desired along with the digital input/output to connect to high-end audio devices . The DSP processor is used for hardware
wavetable synthesis and 3D audio acceleration for the games/multimedia
market, and acoustic echo cancellation for speakerphone/ videoconferencing in the commercial market.
Ordering Information
CS4622-CQ
CS4624-CQ
128-pin TQFP
128-pin TQFP
20x14x1.60 mm
20x14x1.60 mm
If you have any questions, please contact the undersigned by phone or by
email. Also, visit our website
“www.cirrus.com” or call our literature department (800) 888-5016 ext.
3594 or (512) 912-3594 for data
sheets and application notes.
4
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Sales Office and Applications Support
UNITED STATES
Cirrus Logic, Inc.
10440 Little Patuxent Pkwy.,Ste. 300
Columbia, MD 21044-3559
Ph: 410-740-5654
FAX: 410-740-6961
FAR EAST
Sales Office and
Applications Support:
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Cirrus Logic, Inc.
Headquarters, Sales
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Corporate Headquarters
9980 Huennekens
San Diego, CA 92121
1-800-677-7716
Ph: 619-450-8500
FAX: 619-450-8550
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A-1403, Qiancun Commercial Mansion
Beijing, China 100029
Ph: (8610)6443-0783
FAX: (8610)6443-0786HONG
Sales Office and
Applications Support:
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827 Wellesley Ave.
Los Angeles, CA 90049
Ph: 310-820-6489
FAX: 310-820-6180
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Westlake Village
The Townsgate Executive Bldg.
2659 Townsgate Road, Ste. 238
Westlake Village, CA 91361
Ph: 805-371-5860
FAX 805-371-5861
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6650 S.W. Redwood Lane,
Ste. 105, First Floor Bldg. 16
Portland, Oregon 97224
Ph: 503-620-5547
FAX: 503-620-5665
CENTRAL AREA
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14205 Burnet Rd., Ste. 400
Austin, TX 78728
Ph: 512-255-8893
FAX: 512-255-0733
SOUTHEASTERN AREA
Cirrus Logic, Inc.
5511 Capital Center Dr., Ste. 103
Raleigh, NC 27606
Ph: 919-859-5210
FAX: 919-859-5334
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3998 NW 8th Avenue, Ste. 300
Boca Raton, FL 33431
Ph:561-395-1613
FAX: 561-395-1373
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Cirrus Logic, Inc.
10 New England Business
Center, Ste. 100
Andover, MA 01810
Ph: 978-794-9992
FAX: 978-794-9998
Nu Horizons Electronics
Corporate Headquarters
70 Maxess Rd.
Melville, NY 11747
1-888-747-6846
Ph: 516-396-5000
FAX: 516-396-5050
CHINA
KONG
Cirrus Logic International Ltd.
Hong Kong
Ph: (852)2376-0801KOREA
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Seoul, Korea
Ph: +82(2)565-8561
EUROPE
SINGAPORE
Sales Office and
Applications Support:
Cirrus Logic
Crystal International Ltd.
Singapore
Ph: +65-743-4111
Cirrus Logic International SARL
Immeuble Andre Malraux
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CEDEX, France
Ph: +33148122812
FAX: +33148122810
Cirrus Logic (UK) Ltd.
Anglers Court
Spittal St.
Marlow
Bucks, England SL7 1DB
Ph: +44(0)1628 472 211
FAX: +44(0)1628 486 114
Cirrus Logic GmbH
Muehlfelder-Strasse 2
D-82211 Herrsching, Germany
Ph: +49815292460
FAX: +498152924699
TAIWAN
Cirrus Logic International Ltd.
Taiwan Branch
10F, No. 214, Tun Hwa North Rd.
Taipei, Taiwan R.O.C.
Ph: +886(22)718-4533
FAX: +886(22)718-4526
JAPAN
Sales Office and
Applications Support:
Cirrus Logic K.K.
Tokyo, Japan
Ph: +81(03)3340-9111
4622-4pi.fm Page 6 Tuesday, July 7, 1998 1:21 PM
PC MULTIMEDIA AUDIO
PO BOX 17847
4210 S. INDUSTRIAL DRIVE
AUSTIN, TEXAS 78744
512.445.7222 / 800.888.5016
FAX: 512.445.7581
WORLDWIDE WEB:
http://www.cirrus.com