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PDF CS48DV2B Data sheet ( Hoja de datos )
| Número de pieza | CS48DV2B | |
| Descripción | 32-bit Audio DSP | |
| Fabricantes | Cirrus Logic | |
| Logotipo |  |
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CS48DV2B Data Sheet
FEATURES
World’s most cost-effective 32-bit DSP featuring Dolby®
Volume and Audistry® by Dolby
— Supports native processing at input Fs up to 48kHz
— Single download image enables support for 32 KHz,
44.1 kHz, and 48 kHz audio input
CS48DV2B supports up to 2.0 channels of audio input
and up to 2.1 channels of output
Enables concurrent processing features beyond Dolby
Volume including Tone Control, Multiband Parametric EQ,
Bass Management, Delays.
Configurable Serial Audio Inputs/Outputs
— Configurable for all input/output digital audio types
(I2S/LJ/RJ)
— 32-bit data path delivers uncompromised dynamic
range
— 192 kHz capable integrated S/PDIF transmitter
— DAO can operate in master or slave mode (SCLK &
LRCLK)
Integrated Clock Manager/PLL
— Capable of operating from a wide variety of external
crystals or external oscillators
Slave Host Boot Capability via Serial Interface
— SPI™ interface capable of running up to 25 MHz
during run time
1.8V Core and 3.3V I/O that is tolerant to 5V input
Low-power Mode enabled
— Energy Star® Design Compliance Capability via low-
power mode, 268 µW in Standby mode
The new CS48DV2B supports a host of signal processing
applications concurrently, including the mass production-ready
Dolby Volume solution. See Section 3. for details about
firmware concurrency on the CS48DV2B. The target
applications for the CS48DV2B DSP are:
— Digital Televisions
— Soundbars / DTVs with Integrated Soundbars
— PMD/iPod® Docking Stations
— Automotive Head Units
— Automotive Outboard Amplifiers
— Blu-ray Disc® & DVD Receivers / HTiBs
— PC Speakers
All of these applications and many more that use volume
control and are subject to playback from sources that do not
have consistent volume levels will benefit from the CS48DV2B
Dolby Volume solution.
Ordering Information:
See page 21 for ordering information.
2.0 Ch.
Audio In
S/PDIF
Up to 2.1 Ch
Audio Out
Serial
Control 1
GPIO
32-bit
DSP
PXY
D
M
A
Debug
Watchdog
TMR1
TMR2
PLL
http://www.cirrus.com
Copyright 2009 Cirrus Logic
CONFIDENTIAL
FEB ’09
DS875F2
1 page  
CS48DV2B Data Sheet
32-bit Audio DSP for Dedicated Dolby Volume and Audistry by Dolby
1. Documentation Strategy
The CS48DV2B Data Sheet describes CS48DV2B multichannel audio processors. This document
should be used in conjunction with the following documents when evaluating or designing a system
around the CS48DV2B processors.
Table 1. CS48DV2B DSP Related Documentation
Document Name
Description
CS48DV2B Data Sheet
This document
CS485xx Family Hardware User’s Manual
Includes detailed system design information including
Typical Connection Diagrams, Boot-Procedures, Pin
Descriptions, etc.
AN298 - CS485xx Family Firmware User’s Manual
Includes detailed firmware design information
including signal processing flow diagrams and control
API information
DSP Composer User’s Manual
Includes detailed configuration and usage
information for the GUI development tool.
AN298VPMA,Audistry® by Dolby®”
Describes API used to control the Audistry firmware
module.
AN298PPMN, Dolby® Volume Firmware User’s
Manual for the CS48DV2x Family
Describes API used to control the Dolby Volume
firmware module.
The scope of the CS48DV2B Data Sheet is primarily the hardware specifications of the CS48DV2B
devices. This includes hardware functionality, characteristic data, pinout, and packaging information.
The intended audience for the CS48DV2B Data Sheet is the system PCB designer, MCU
programmer, and the quality control engineer.
2. Overview
The CS48DV2B DSP is designed to provide high-performance post-processing and mixing of digital
audio. The dual clock domain provided on the PCM inputs allows for the mixing of audio streams with
different sampling frequencies. The low-power standby preserves battery life for applications which
are always on, but not necessarily processing audio, such as automotive audio systems.
The CS48DV2B supports dual input clock domains and dual audio processing paths. The
CS48DV2B is available in a 48-pin QFP package. Please refer to Table 2 on page 7 for the input,
output, firmware features of each device.
2.1 Licensing
Licenses are required for all of the 3rd party audio processing algorithms listed in Section 3. Please
contact your local Cirrus Logic Sales representative for more information.
DS875F2
Copyright 2009 Cirrus Logic
CONFIDENTIAL
5
5 Page 
CS48DV2B Data Sheet
32-bit Audio DSP for Dedicated Dolby Volume and Audistry by Dolby
5.4 Power Supply Characteristics
(Measurements performed under operating conditions)
Parameter
Operational Power Supply Current:
VDD: Core and I/O operating1
VDDA: PLL operating
VDDIO: With most ports operating
Total Operational Power Dissipation:
Min Typ Max Unit
- 203 -
-8-
- 27 -
480
mA
mA
mA
mW
Standby Power Supply Current:
VDD: Core and I/O not clocked
VDDA: PLL halted
VDDIO: All connected I/O pins 3-stated by other ICs in system
Total Standby Power Dissipation:
1. Dependent on application firmware and DSP clock speed.
5.5 Thermal Data (48-Pin LQFP)
Parameter
Symbol
Junction Temperature
Tj
Thermal Resistance (Junction to Ambient)
Two-layer Board1
Four-layer Board2
θja
Thermal Resistance (Junction to Top of Package)
Two-layer Board3
Four-layer Board4
ψjt
-
-
-
-
Min
-
-
-
-
-
100 -
1-
50 -
348 -
μA
μA
μA
μW
Typ Max
- 125
Unit
°C
63.5 - °C / Watt
54 -
0.70 - °C / Watt
0.64 -
1. Two-layer board is specified as a 76 mm X 114 mm, 1.6 mm thick FR-4 material with 1-oz. copper covering 20 % of the top &
bottom layers.
2. Four-layer board is specified as a 76 mm X 114 mm, 1.6 mm thick FR-4 material with 1-oz. copper covering 20 % of the top &
bottom layers and 0.5-oz. copper covering 90 % of the internal power plane & ground plane layers.
3. To calculate the die temperature for a given power dissipation
T θj = Ambient Temperature + [ (Power Dissipation in Watts) * ja ]
4. To calculate the case temperature for a given power dissipation
Tc = Tj - [ (Power Dissipation in Watts) * ψjt ]
DS875F2
Copyright 2009 Cirrus Logic
CONFIDENTIAL
11
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