
Advance Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
1
Copyright
Cirrus Logic, Inc. 2000
(All Rights Reserved)
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
CS4811
Fixed Function Multi-Effects Audio Processor
Features
l
Audio Processor for embedded
reverb/effects applications
– Proprietary 24-bit Audio Processing Engine
– On-chip RAM (No external RAM required)
– On-chip 24-bit
Σ
ADC with 100 dB Dyn. Range
– On-chip 24-bit
Σ
DAC with 100 dB Dyn. Range
– Automatically boots firmware from external
serial EEPROM
l
Firmware available for Guitar Effects or Mixer
Effects applications
l
Single +5 V Supply
l
100-pin Metric Quad Flat Pack (MQFP)
Description
The CS4811 is a complete audio effects processing
system on a chip. This device integrates a proprietary 24-
bit audio processing engine, large on-chip RAM
memories, and a high performance 24-bit audio codec. A
serial control port allows the device to boot firmware from
a compact and low cost SPI or I
2
C serial EEPROM. Other
features such as single +5 V operation simplify system
design.
Firmware for the CS4811 is provided by Cirrus Logic.
There are two different firmware codes available; one for
guitar effects and one for audio mixers. The guitar effects
firmware provides a host of electric guitar effects includ-
ing spring reverb, delay, chorus, flange and tremolo.
The mixer effects firmware provides a suite of effects
such as digital reverb, delay and chorus which are suit-
able for use in audio mixers, karaoke and acoustic
instrument
amplifiers.
The
CDB4811MXR evaluation boards allow easy evaluation
of the CS4811 device and the associated firmware.
CDB4811GTR
and
ORDERING INFO
CS4811-KM
CDB4811GTR-01
CDB4811MXR-01
-10 to +70°C
Guitar Effects Evaluation Board
Mixer Effects Evaluation Board
100-pin MQFP
I
CMOUT
CMFILT+
CMFILT-
AIN+
AIN-
XTO
XTI
CLOCK
MANAGER
AOUT+
24-BIT AUDIO
PROCESSING
ENGINE
VOLTAGE
REFERENCE
PIO3
PIO2
PIO1
PIO0
DIGITAL FILTER
DAC
A
O
D
SERIAL CONTROL PORT (SPI or I
2
C)
ADC
SPI/I
2
C
SCL/CCLK
SDA/CDOUT
AD1/CDIN
AD0/CS
RST
OVL
AOUT-
RAM
SEP ‘00
DS486PP2