ICE1232

Manufacturer Part NumberICE1232
Descriptionac 97 2.1 VSR Audio Codec With 3D
ManufacturerIC Ensemble
ICE1232 datasheet
 


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Features
• AC’97 2.1 compliant codec
• 18-bit stereo full duplex
codec
• VSR (Variable Sampling Rate), 1Hz resolution
• 3D stereo expansion for simulated surround
• 4 stereo analog line-level inputs
• 2 mono analog line-level inputs
• MIC level input switchable from two sources
• Second line-level output with volume control
• Multiple codec mode
• External Audio Amplifier Control
• Power management support
• Low Power consumption mode
• Exceeds Microsoft® PC’9x requirements
• 3.3V, 5V or split analog/digital power supply
• 48-pin TQFP or LQFP package
PC_BEEP
PHONE
SRC
LINE
CD
VIDEO
AUX
VOL
MIC1
M
U
+20dB
X
MIC2
SYNC
BIT_CLK
AC’97
Digital
SDATA_OUT
Interface
SDATA_IN
RESET#
XTL_IN
OSC
XTL_OUT
Rev. 1.5, 1/10/00
AC‘97 2.1 VSR Audio Codec with 3D
Description
IC Ensemble’s ICE1232
conforms to the AC’97 2.1 specification with
excellent analog performance. The ICE1232
integrates a sophisticated Sample Rate Converter
that can be adjusted in 1Hz increments. This
makes it ideal for host-based signal processing
motherboard applications which lacks a hardware
accelerator. The mixer circuitry integrates a stereo
enhancement to provide a pleasing 3D surround
sound effect for stereo media. This codec is
designed with aggressive power management to
achieve ultra low power consumption when used
with a 3.3V supply. The primary applications for
this part are desktop and portable personal
computers multimedia subsystems. However, it is
suitable for any system requiring audio domain
conversion, mixing and volume control at
competitive prices.
VOL
MUTE
VOL
MUTE
DAC
VOL
MUTE
VOL
MUTE
VOL
MUTE
3D
VOL
MUTE
VOL
MUTE
VOL
MUTE
PCM IN
Figure 1. Functional Block Diagram
ICE1232
Preliminary
TM
18-bit
audio codec
MASTER
LINE_OUT
VOLUME
MASTER
LNLVL_OUT
VOLUME
M
MONO
U
MONO_OUT
VOLUME
X
M
MASTER
U
INPUT
ADC
X
VOLUME
SRC
1