CS48520 Datasheet, PDF (1/23 Pages) Cirrus Logic – Cost-effective, High-performance 32-bit DSP

CS485xx
CS485xx Family 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 most accurate in the industry
 24k x 32 SRAM, 2k blocks - assignable to data or program
 Internal ROM contains a variety of configurable sound
enhancement feature sets
 8-channel internal DMA
 Internal watch-dog DSP lock-up prevention
 DSP Tool Set w/ Private Keys for Protecting Customer IP
 Configurable Serial Audio Inputs/Outputs
 Configurable for all input/output types
 Maximum 32-bit @ 192 kHz
 Supports 32-bit audio sample I/O between DSP chips
 TDM input modes (multiple channels on same line)
 192 kHz SPDIF transmitter
 Multi-channel DSD direct stream digital SACD input
 Supports Two Different Input Fs Sample Rates
 Output can be master or slave
 Dual processing path capability
 Input supports dual domain slave clocking
 Hardware assist time sampling for sample rate conversion
 Integrated Clock Manager/PLL
 Can operate from external crystal, external oscillator
 Input Fs Auto Detection
 Host & Boot via 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
 “Energy Star^® Ready” in low-power mode, 268 µW in standby
Differentiating from the legacy Cirrus multi-standard, multi-channel
decoders, this new CS485xx family is still based on the same
high-performance 32-bit fixed point Digital Signal Processor core
but instead is equipped with much less memory, tailoring it for more
cost-effective applications associated with multi-channel and
virtual-channel sound enhancements. Target applications are:
 Digital Televisions
 Multimedia Peripherals
 iPod^® Docking Stations
 Automotive Head Units
 Automotive Outboard Amplifiers
 HD-DVD^™ and Blu-ray Disc^® DVD Receivers
 PC Speakers
There are also a wide variety of licensable DSP codes available
today as seen by the following examples:
Cirrus also has developed, or is developing their own royalty-free
versions of popular features sets like Cirrus Bass Manager, Cirrus
Dynamic Volume Leveler, Cirrus Original Multichannel Surround,
Cirrus Virtual Speaker & Cirrus 3D-Audio.
The CS485xx family is programmed using the Cirrus proprietary
DSP Composer^™ GUI development tool. Processing chains may be
designed using a drag-and-drop interface to place/utilize functional
macro audio DSP primitives. The end result is a software image that
is down-loaded to the DSP via serial host or serial boot modes.
See Section 6 for ordering information.
12 Ch. Audio In /
6 Ch. SACD In
S/PDIF
12 Ch PCM
Audio Out
http://www.cirrus.com
Serial
Control 1
GPIO
32-bit
DSP
D
M
A
PXY
CS485xx Block Diagram
Copyright  Cirrus Logic, Inc. 2011
(All Rights Reserved)
Debug
Watchdog
TMR1
TMR2
PLL
DS734F5
OCT '11