Cirrus Logic CS470xx - Manual

Copyright
 Cirrus Logic, Inc. 2012
(All Rights Reserved)
http://www.cirrus.com
DS787PP9
JUL '12
CS470xx Data Sheet
Features
 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
THD+N
 4 † Channels of 24-bit ADC input: 105dB DR, –98 dB
THD+N
 Integrated 5:1 analog mux feeds one stereo ADC
 Configurable Serial Audio Inputs and Outputs
 Integrated 192 kHz S/PDIF Rx
 Integrated 192 kHz S/PDIF Tx
 Supports 32-bit serial data @ 192 kHz
 Supports 32-bit audio sample I/O between DSP chips
 TDM I/O modes
 Supports Different Sample Rates (Fs)
 Three integrated hardware SRC blocks
 Output can be master or slave
 Supports dual-domain Fs on S/PDIF vs. I²S inputs
 DSP Tool Set with Private Keys Protect Customer IP
 Integrated Clock Manager/PLL
 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
“ †” features differ on CS47024, CS47028, or CS47048.
See Table 3-1 .
The CS470xx family is a new generation of audio
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.
Target applications include:
 Automotive head units and outboard amplifiers
 Automotive processors and automotive integration hubs
 Digital TV
 MP3 docking stations
 AVR and DVD RX
 DSP controlled speakers (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 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.
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 Section 6 for ordering information.
CS470xx