CS4622 データシートの表示（PDF） - Cirrus Logic
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CS4622 Datasheet PDF : 7 Pages
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CS4622/24
Description
the CS4622/24 enables real mode DOS compatible PCI-only audio sub-
systems. This device, 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 hard-
ware scatter-gather support. These support functions ensure extremely efficient
transfer of audio data streams to and from host-based memory buffers, provid-
ing 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 sec-
ondary 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.
PCI
PCI Bus Interface
96-Stream
DMA Controller
with Hardware
Scatter/Gather
PC/PCI &
CCLS Legacy
MPU-401
MIDI Interface
Joystick
Interface
Parameter
RAM
Sample
RAM
Program SLIMD
RAM SP Core
Program
ROM
Coefficient
ROM
AC ’97 2.0
Interface
AC ’97 2.0
Interface
S/PDIF In
S/PDIF Out
ZV Port
Async. Modem
Interface
2
PI293PP1 JUL ‘98
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