Cirrus Logic CS48AU2B - Manual

Copyright 2009 Cirrus Logic MAY ’09
CONFIDENTIAL DS876F3
http://www.cirrus.com
CS48AU2B Data Sheet
CONFIDENTI
A
L
DRA
FT
DELPHI
FEATURES
‰
World’s first cost-effective, high-performance 32-bit DSP
that is solely dedicated to enable Audyssey Laboratories
audio processing technologies for today’s high-volume
consumer electronic products
‰
Features: Audyssey Dynamic Volume TM , Audyssey Dynamic
EQ TM , Audyssey EQ TM & Audyssey BassXT TM /BassXT-TV TM
‰
Audyssey Dynamic Volume eliminates the need for
constant volume adjustments
‰
Audyssey Dynamic EQ enables a reference playback
experience at any desired playback level
‰
Audyssey EQ removes much of the distortion caused by
speaker enclosures and the typical room environment
producing greatly improved sound compared to similar
products without correction
‰
Audyssey BassXT and BassXT-TV are specifically
calibrated to enhance the physical bass response of each
product model
‰
Configurable Serial Audio Inputs/Outputs
— Maximum 32-bit @ 192 kHz
(Note: Audyssey Laboratories algorithms support 48 kHz,
44.1 kHz and 32 kHz)
— Integrated 192 kHz capable S/PDIF transmitter
‰
Integrated Clock Manager/PLL
— Can operate from external crystal, external oscillator
‰
Input Fs Auto Detection & Coefficient Loading
‰ Host Control & Boot via Serial Interface
‰
Support for Master (Self) Boot via Serial EEPROM for
single Fs applications (i.e. 48 kHz only via ADC input)
‰
Configurable GPIOs and External Interrupt Input
‰
1.8V Core and a 3.3V I/O that is tolerant to 5V input
‰
Low-power Mode
— “ Energy Star
®
Ready” via low-power mode, 268 µW in
standby
32-bit
DSP
D
M
A
P X Y
Serial
C ontrol 1
M ultichannel
Audio O ut
GPIO D ebug
W atchdog
TM R 1
TM R 2
PLL
S/PD IF
M ultichannel
Audio In
The brand new CS48AU2B device is still based on the same
high-performance 32-bit fixed point Digital Signal Processor
core but instead is equipped with much less memory, tailoring
it for more cost-effective applications which feature Audyssey
Laboratories audio processing technologies. Target
applications are:
— Digital Televisions
— iPod ® Docking Stations
— Automotive Head Units (OEM and Aftermarket)
— Automotive Outboard Amplifiers (OEM and Aftermarket)
— Blu-ray ® Disc Receivers
— Soundbars / Sound Projectors
The following Audyssey Laboratories algorithms are currently
supported on the CS48AU2B and more are in development:
While the individual Audyssey processing algorithms have
already been implemented on this DSP, the CS48AU2B is
programmed using the Cirrus proprietary DSP Composer
™
GUI development tool.
Processing chains combining both standard signal
processing blocks (Tone Control, Bass Management, etc.) in
combination with any combination of Audyssey Laboratories
technology algorithm blocks may be designed using a simple
drag-and-drop interface to create a custom signal flow
specific to your product model. The end result of this is a
software image that is down-loaded to the DSP via serial host
(I
2 C ® or SPI TM ) or via a serial master (self) boot.
Support for loading of the various Audyssey Laboratories
algorithm coefficient files supplied by Audyssey Laboratories
is easily supported via DSP Composer, enabling the
OEM/ODM to quickly be able to generate the necessary files
for the system microcontroller which have been custom
tailored for each specific model based on the measurement
and analysis performed by Audyssey Laboratories.
Ordering Information:
See
page 21 for ordering information