CS485XX Datasheet, PDF (1/26 Pages) Cirrus Logic – 32-bit Audio Decoder DSP Family

CS485xx Family Data Sheet
FEATURES
Differentiating from the legacy Cirrus multi-standard, multi-
channel decoders, this new CS485xx family is still based on
‰ Cost-effective, High-performance 32-bit DSP
the same high-performance 32-bit fixed point Digital Signal
— 300,000,000 MAC/S (multiply accumulates per second)
— Dual MAC cycles per clock
— 72-bit accumulators are the most accurate in the industry
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:
— 24k x 32 SRAM, 2k blocks - assignable to data or program
— Digital Televisions
— Internal ROM contains a variety of configurable sound
enhancement feature sets
— Multimedia Peripherals
— 8-channel internal DMA
— iPod^® Docking Stations
— Internal watch-dog DSP lock-up prevention
‰ DSP Tool Set w/ Private Keys for Protecting Customer IP
T ‰ Configurable Serial Audio Inputs/Outputs
— Configurable for all input/output types
F _{— Maximum 32-bit @ 192 kHz}
— Supports 32-bit audio sample I/O between DSP chips
— TDM input modes (multiple channels on same line)
A _{— 192 kHz SPDIF transmitter}
— Multi-channel DSD direct stream digital SACD input
R _{‰ Supports Two Different Input Fs Sample Rates}
— Output can be master or slave
D _{— Dual processing path capability}
— Input supports dual domain slave clocking
— Hardware assist time sampling for sample rate conversion
L I ‰ Integrated Clock Manager/PLL
— Can operate from external crystal, external oscillator
IA ^{‰ Input Fs Auto Detection}
H _{‰ Host & Boot via Serial Interface}
‰ Configurable GPIOs and External Interrupt Input
T ^P _{‰ 1.8V Core and a 3.3V I/O that is tolerant to 5V input}
N ^{L ‰ Low-power Mode}
— “Energy Star^® Ready” in low-power mode, 268 µW in standby
— Automotive Head Units
— Automotive Outboard Amplifiers
— HD-DVD & Blu-ray Disc DVD Receivers
— PC Speakers
There are 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.
Ordering Information:
See page 20 for ordering information
FIDE ^DE 12 Ch.AudioIn /
6 Ch. SACD In
N _S/PDIF
O _{12 Ch PCM}
C^{Audio Out}
Serial
Control 1
GPIO
32-bit
DSP
D
M
A
PXY
Debug
Watchdog
TMR1
TMR2
PLL
http://www.cirrus.com
Copyright 2009 Cirrus Logic, Inc.
CONFIDENTIAL
FEB ’09
DS734F3