CS470xx
CS470xx Data Sheet
The CS470xx family is a new generation of audio
Features
system-on-a-chip (ASOC) processors targeted at high
fidelity, cost sensitive designs. Derived from the highly
successful CS48500 32-bit fixed-point audio enhancement
processor 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 S/PDIF stream to a lower Fs to reduce memory
and MIPS requirements for processing. This integration
effectively reduces the chip count from 3 to 1, which allows
smaller, less expensive board designs.
. Cost-effective, High-performance 32-bit DSP
. 300,000,000 MAC/S (multiply accumulates per second)
. 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 Y data or program memory
. Integrated DAC and ADC Functionality
†
. 8 Channels of 24-bit DAC output: 108dB DR, –98 dB Target applications include:
THD+N
. Automotive head units and outboard amplifiers
†
. 4 Channels of 24-bit ADC input: 105dB DR, –98 dB
. Automotive processors and automotive integration hubs
. Digital TV
THD+N
. Integrated 5:1 analog mux feeds one stereo ADC
. Configurable Serial Audio Inputs and Outputs
. MP3 docking stations
. Integrated 192 kHz S/PDIF Rx
. Integrated 192 kHz S/PDIF Tx
. AVR and DVD RX
. DSP controlled speakers (subwoofers, sound bars)
. Supports 32-bit serial data @ 192 kHz
. Supports 32-bit audio sample I/O between DSP chips
. TDM I/O modes
The CS470xx is programmed using the simple yet powerful
Cirrus proprietary DSP Composer™ GUI development and
pre-production tuning tool. Processing chains can 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.
. Supports Different Sample Rates (Fs)
. Three integrated hardware SRC blocks
. Output can be master or slave
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.
. Supports dual-domain Fs on S/PDIF vs. I²S inputs
. DSP Tool Set with Private Keys Protect Customer IP
. Integrated Clock Manager/PLL
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.
. Flexibility to operate from internal PLL, external crystal,
external oscillator
. Input Fs Auto Detection w/ µC Acknowledgement
. Host Control and Boot via I²C™ or SPI™ Serial Interface
. Configurable GPIOs and External Interrupt Input
. 1.8V Core and a 3.3V I/O that is tolerant to 5V input
. Low-power Mode
Ordering Information:
See Section 6 for ordering information.
†”
“ features differ on CS47024, CS47028, or CS47048.
See Table 3-1.
Copyright Cirrus Logic, Inc. 2012
(All Rights Reserved)
DS787PP9
JUL '12
http://www.cirrus.com