cs47028-dqz Cirrus Logic, Inc., cs47028-dqz Datasheet - Page 7

• Manufacturer Part Number: cs47028-dqz
• Description: System-on- A-chip Asoc Processors
• Manufacturer: Cirrus Logic, Inc.

3. Code Overlays
DS787PP5
The suite of software available for the CS470xx family consists of an operating system (OS) and a
The bulk of standard overlays are stored in ROM within the CS470xx, but a small image is required
The overlay structure reduces the time required to reconfigure the DSP when a processing change
Table 2
library of overlays. The software components for the CS470xx family include:
to configure the overlays and boot the DSP. This small image can either be stored in an external
serial FLASH/EEPROM, or downloaded via a host controller through the SPI
is requested. Each overlay can be reloaded independently without disturbing the other overlays.
For
only the new post-processor.
User’s Manual for the latest listing of application codes and Cirrus Framework
See
communication mode for members of the CS470xx family of DSPs.
2. Decoder—Any module that performs a compressed audio decode on IEC61937-packed data
3. Matrix-processor—Any Module that performs a matrix decode on PCM data to produce more
4. Virtualizer-processor—Any module that encodes PCM data into fewer output channels than
5. Post-processors—Any module that processes audio I/O buffer PCM data. Examples are bass
1. OS/Kernel—Encompasses all non-audio processing tasks, including loading data from external
serial memory, processing host messages, calling audio-processing subroutines, error
concealment, etc
delivered via S/PDIF Rx or I²S input, such as Dolby Digital (AC3).
output channels than input channels (2n channels). Examples are Dolby
SRS Circle Surround II
channels in the audio I/O buffer.
input channels (n2 channels) with the effect of providing “phantom” speakers to represent the
physical audio channels that were eliminated. Examples are Dolby Headphone
Virtual Speaker
the audio I/O buffer.
management, audio manager, tone control, EQ, delay, customer-specific effects, and any post-
processing algorithms available for the CS470xx DSP.
example,
Table 3
lists the different configuration options available. Please refer to the CS470xx Firmware
which provides a summary of the available channels for each type of input and output
when a different post-processor is selected, the OS, does not need to be reloaded —
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2. Generally speaking, these modules reduce the number of valid channels in
®
. Generally speaking, these modules increase the number of valid
Copyright 2011 Cirrus Logic
Audio SOC Processor Family
/
I
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2
C serial port.
Pro Logic
modules available.
CS470xx Data Sheet
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2 and Dolby
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IIx and
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