CS4610 datasheet(10/29 Pages) CIRRUS

10 / 29 page

DS241PP5

CS4610/11

CrystalClear™ SoundFusion™ PCI Audio Accelerator

provides all Analog-to-Digital conversion (ADC)

and Digital-to-Analog conversion (DAC) func-

tions. Digital audio is transferred between the

CS423x and the CS4610/11 over a proprietary bi-

directional serial data link between the two devices.

MIDI data from the CS423x MPU-401 UART is

also transferred serially to the CS4610. DOS appli-

cations can directly address the CS423x audio

functions on the ISA bus. Windows DirectX audio

applications will address the PCI-based CS4610/11

device through Windows DirectX drivers, wherein

the CS423x is utilized as the external Codec for an-

alog I/O.

A system diagram depicting connection of the

CS4610/11 to the CrystalClear CS4297 AC’97 Co-

dec is given in Figure 7. All analog audio inputs

and outputs are connected to the AC’97 Codec. Au-

dio data is passed between the AC’97 Codec and

the CS4610/11 over the serial AC-Link. The

CS4610/11 provides a hardware interface for con-

nection of a joystick and MIDI devices. Legacy au-

dio support under a Windows DOS Box is provided

via virtualization of the Sound Blaster

™, OPL3

FM synthesizer and MPU-401 MIDI interface reg-

isters.

PCI Bus

Host Bridge /

Mem Control

ISA

Bridge

ISA Bus

CS423x

Motherboard

Audio

CS4610/11

Accelerator

Audio Out

CPU

Audio In

Digital

Link

Host Memory

Opt. CS4333 DACs

Optional

Surround

Outputs

Figure 6. CS4610/11 + CS423x Motherboard Audio Configuration

CPU

Host Bridge /

Mem Control

Host Memory

PCI Bus

CS4610/11

Accelerator

AC ’97

Codec

Audio Out

Audio In

Figure 7. CS4610/11 + AC ‘97 Codec Configuration

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