Cirrus Logic CS4970x4 User Manual
Page 14
Overview of the CS4953x4/CS4970x4 DSP
CS4953x4/CS4970x4 System Designer’s Guide
DS810UM6
Copyright 2013 Cirrus Logic, Inc
P-3
Figure P-2. CS4953x4 Chip Functional Block Diagram
See AN288 for a list of decoders, post-processers, virtualizers that CS4953x4/CS4970x4 DSPs support.
HD Decoder are only available on the CS4970x4 DSPs.
Audio decoding/processing algorithms, post-processing application codes, and/or Cirrus Framework
™
modules and the associated application notes are available through the Cirrus Software Licensing
Program. Standard post-processing code modules are only available to customers who qualify for the
Cirrus Framework
™
CS4953x4/CS4970x4 Family DSP Programming Kit. Please refer to the Related
Documents section of the Framework
™
manual for information on additional documentation support.
The CS4953x4/CS4970x4 DSP contains sufficient on-chip memory to support decoding of all major audio
decoding algorithms available today. The CS4953x4/CS4970x4 DSP supports a glueless SDRAM
interface for increased all-channel delays. The memory interface also supports connection to an external
SPI Flash for code storage, thus allowing products to be field upgraded as new audio algorithms are
developed.
This chip, teamed with the Cirrus Logic certified decoder library, Cirrus Logic digital interface products,
and mixed-signal data converters, enables the design of next-generation digital entertainment products.
DAI
Controller
DMA Controller with 11 Stereo Channels
Programmable
Interrupt Controller
Peripheral
Bus
Controller
Memo
ry C
o
ntr
o
lle
r
Log/Exp
Security
Ext (64 bit)
DMA Bus
Peripheral Bus
Decryptor
32-bit Dual Datapath
DSP
with 72-bit
Accumulators
X
Y
P
X
P
Y
64 bit
Stereo Audio Output
Stereo Audio Output
Stereo Audio Output
Ar
bit
e
r
Ar
b
it
e
r
Stereo Audio Output or
SPDIF Transmitter
DAO
Controller
ROM
SRAM
ROM
SRAM
ROM
SRAM
Timers
GPIOs
Clock Manager and PLL
Parallel Control Port
Serial Control Port
S
D
R
A
M
C
ontrol
ler
SRA
M
/
F
L
ASH
C
o
nt
ro
ller
Debug
Controller
DSPA
DSPB
DAO1
Stereo Audio Input/DSD
Stereo Audio Input/DSD
Stereo Audio Input/DSD
Stereo Audio Input/DSD
Stereo Audio Output
Stereo Audio Output
Stereo Audio Output
Stereo Audio Output or
SPDIF Transmitter
DAO
Controller
DAO2
DAI1
CS4953x4
Stereo Audio Input /
Bursty Data Input/DSD
Stereo Audio Input/DSD
DAI2
DAI
Controller