CS470XX Datasheet, PDF (1/40 Pages) Cirrus Logic – Audio SOC Processor Family

CS470xx Data Sheet
FEATURES
The CS470xx family is a new generation of audio system-on-
‰ Cost-effective, High-performance 32-bit DSP
a-chip (ASOC) processors targeted at high fidelity, cost
sensitive designs. Derived from the highly successful
— 300,000,000 MAC/S (multiply accumulates per second)
CS48500 32-bit fixed point audio enhancement processor
— Dual MAC cycles per clock
— 72-bit accumulators are the highest precision in the industry
— 32K x 32-bit SRAM with three 2K blocks assignable to either
family, the CS470xx further simplifies system design and
reduces total system cost by integrating the S/PDIF Rx,
S/PDIF Tx, analog inputs, analog outputs, and SRCs. For
example, a hardware SRC can down-sample a 192 kHz
Y data or program memory
S/PDIF stream to a lower Fs to reduce memory and MIPS
‰ Integrated DAC & ADC Functionality
— 8^† Channels of DAC output: 108dB DR, -98dB THD+N
requirements for processing. This integration effectively
reduces the chip count from 3 to 1 which allows smaller, less
expensive board designs.
— 4^† Channels of ADC input: 105dB DR, -98dB THD+N
— Integrated 5:1 analog mux feeds one stereo ADC
‰ Configurable Serial Audio Inputs/Outputs
T ^{— Integrated 192 kHz S/PDIF Rxâ€} 
— Integrated 192 kHz S/PDIF Tx
— Supports 32-bit Serial Data @ 192 kHz
F _{— Supports 32-bit audio sample I/O between DSP chips}
— TDM I/O^† modes (Up to 10/8 channels per line)
A _{‰ Supports Different Fs Sample Rates}
— Three^† integrated hardware SRC blocks
R _{— Output can be master or slave}
— Supports dual-domain Fs on S/PDIF vs. I²S inputs
D _{‰ DSP Tool Set w/ Private Keys Protect Customer IP}
‰ Integrated Clock Manager/PLL
— Flexibility to operate from internal PLL, external crystal,
L _{I external oscillator}
‰ Input Fs Auto Detection w/ µC Acknowledgement
IA ^{‰ Host Control & Boot via I2C™ or SPI™ Serial Interface}
H _{‰ Configurable GPIOs and External Interrupt Input}
° ° ° ‰ 1.8V Core and a 3.3V I/O that is tolerant to 5V input
T_° P _{‰ Low-power Mode}
“†” ^{N L} Feature may differ on CS47024 or CS47028, see p. 8.
Target applications are:
— Automotive Head Units & Outboard Amplifiers
— Automotive Processors & Automotive Integration Hubs
— Digital TV
— MP3 Docking Stations
— AVR and DVD RX
— DSP Controlled Speakers (e.g. Subwoofers, Sound
Bars)
The CS470xx is programmed using the simple yet powerful
Cirrus proprietary DSP Composer^™ GUI development and
pre-production tuning tool. Processing chains may be
designed using a drag-and-drop interface to place/utilize
functional macro audio DSP primitives and custom audio
filtering blocks. The end result is a software image that is
downloaded to the DSP via serial control port.
The Cirrus Framework^™ programming environment offers
Assembly and C language compilers and other software
development tools for porting existing code to the CS470xx
family platform.
The CS470xx is available in a 100-pin LQFP package with
exposed pad for better thermal characteristics. Both
Commercial (0 C to +70 C) and Automotive (-40 C to
+85 C) temperature grades.
Ordering Information:
See p. 33 for ordering information.
E E ADC’s & DAC’s operate
in Single ended or
Differential mode
ID ^{D I2S/}
TDM /
SPDIF
x4
F I2S/
TDM
DBC
(I²C Slave)
PLL
Clock
Manager
Timers GPIO
Crystal® 32-bit Core
text
in the CS47048 DSP
S
R
8ch
C
2
DAC0
DAC1
DAC2
DAC3
DAC4
DAC5
DAC6
DAC7
N _ADC0/1
Stereo Inputs
On Analog in
CO ^ADC2/3
S
R 4ch
C
1
x8
DMA
ROM
PIC
RAM
ROM
RAM
Y
P
ROM
RAM
S
8ch R
C
3
SRC3 has 8
independent Channels
for In or Out
x2
I²S / TDM
SPI / I²C
Control
32K x 32-bit SRAM with three 2K blocks
Assignable to Program or Y Data memory
x2
I²S / TDM /
SPDIF
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
http://www.cirrus.com
Copyright 2009 Cirrus Logic
CONFIDENTIAL
AUG ’09
DS787PP1