CS4610 CIRRUS [Cirrus Logic], CS4610 Datasheet - Page 10

• Manufacturer Part Number: CS4610
• Description: CrystalClear SoundFusion PCI Audio Accelerator
• Manufacturer: CIRRUS [Cirrus Logic]

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.
10
Figure 6. CS4610/11 + CS423x Motherboard Audio Configuration
Bridge
ISA
Figure 7. CS4610/11 + AC ‘97 Codec Configuration
CPU
CPU
CS4610/11
Accelerator
Accelerator
CS4610/11
Host Bridge /
Mem Control
PCI Bus
Host Bridge /
Mem Control
CrystalClear™ SoundFusion™ PCI Audio Accelerator
ISA Bus
Digital
Link
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
FM synthesizer and MPU-401 MIDI interface reg-
isters.
AC ’97
Codec
PCI Bus
Host Memory
Opt. CS4333 DACs
Host Memory
Motherboard
CS423x
Audio
Audio Out
Audio In
Optional
Surround
Outputs
Audio Out
Audio In
CS4610/11
™
DS241PP5
, OPL3