CS4610/11
Advanced Product Databook
FEATURES
s
High Performance PCI Audio Accelerator
— Powerful RAM-based SLIMD™ DSP core provides high
task concurrency and maximum flexibility
— Efficient bus mastering PCI interface minimizes host
loading
— DMA engine with hardware scatter-gather manages up
to 96 simultaneous audio/data streams
CrystalClear™
SoundFusion™ PCI Audio
Accelerator
The CS4610/11 is based on the Cirrus Logic, Crys-
talClear Stream Processor (SP) DSP core. The SP
core is optimized for digital audio processing, and
is powerful enough to handle complex signal pro-
cessing tasks such as Dolby AC-3 decoding
(CS4610 only) with ease. The SP core is supported
by a bus mastering PCI interface and a built-in ded-
icated 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 CS4610/11 supports a variety of au-
dio I/O configurations, including direct connection
to the CrystalClear CS423x Codecs via a bi-direc-
tional serial data link, or direct connection to an
AC’97 Codec such as the CrystalClear CS4297.
ORDERING INFORMATION
CS4610-CM
100-pin MQFP
CS4610C-CQ 128-pin TQFP
CS4611-CM
100-pin MQFP
20x14x3.07 mm
20x14x1.60 mm
20x14x3.07 mm
s
Flexible Digital Audio Interface Design
— Direct Connection to CS423x Codec
— Simple expansion to 6 audio output channels
— Direct Connection to CS4297 AC’97 Codec
s
Complete Solution including DSP Software and
Windows 95
®
drivers
— Acceleration of DirectSound
®
, DirectSound3D
®
, Direct-
Input™, and DirectShow™ APIs
— High Quality HRTF-Based 3D Positional Sound
— General MIDI Wavetable Synthesis with Reverb and
Chorus
— Dolby
®
AC-3
®
(5.1 channel) and MPEG-2 Audio Decod-
ing (CS4610 only) with speaker virtualization
DESCRIPTION
The CS4610/11 is a high performance audio accel-
erator for the PCI bus. This device, combined with
application and driver software, provides a com-
plete system solution for hardware acceleration of
Windows 95 DirectSound, DirectSound3D, Direct-
Input, DirectShow, and Wavetable Synthesis.
96-Stream
DMA Controller
with Hardware
Scatter/Gather
Interrupt
Controller
Parameter
RAM
Program
RAM
AC ’97
Interface
PCI
Interface
Sample
RAM
Coefficient
ROM
SLIMD
SP Core
423x Interface
and Dual I
2
S
Output
MPU-401
MIDI Interface
Joystick
Interface
PLL Clock
Generator
GPIO
DS241PP5
Copyright
©
Cirrus Logic, Inc. 1998
(All Rights Reserved)
MAR ‘98
CIRRUS [ CIRRUS LOGIC ]
