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参数资料
| 型号： | CS497024-CVZR |
| 厂商： | CIRRUS LOGIC INC |
| 元件分类： | 消费家电 |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP128 |
| 封装： | LEAD FREE, LQFP-128 |
| 文件页数： | 16/19页 |
| 文件大小： | 454K |
| 代理商： | CS497024-CVZR |
CS4970x4 Data Sheet
32-bit High Definition Audio Decoder DSP Family
DS752PP10
6
3 Code Overlays
The suite of software available for the CS4970x4 family consists of operating systems (OS) and a library of
overlays. The overlays have been divided into three main groups: decoders, matrix processors, and
postprocessors. All software components are defined in the following list:
OS/Kernel - Encompasses all non-audio processing tasks, including loading data from external memory,
processing host messages, calling audio-processing subroutines, auto-detection, error concealment, etc.
Decoders - Any module that initially writes data into the audio I/O buffers, e.g. AC-3, DTS, PCM, etc. All
the decoding/processing algorithms listed require delivery of PCM or IEC61937-packed, compressed data
via I2S- or LJ-formatted digital audio to the CS4970x4 from A/D converters, SPDIF Rx, HDMI Rx, etc.
Matrix-processors - Any module that processes audio I/O buffer PCM data in-place before the Post-
processors. Generally speaking, these modules alter the number of valid channels in the audio I/O buffer
through processes like Virtualization (n
2 channels) or Matrix Decoding (2n channels). Examples are
Dolby ProLogic IIx and DTS Neo:6.
Virtualizer-processor - Any module that encodes PCM data into fewer output channels than input
channels (n
2 channels) with the effect of providing “phantom” speakers to represent the physical audio
channels that were eliminated. Examples are Dolby Headphone 2 and Dolby Virtual Speaker 2. Generally
speaking, these modules reduce the number of valid channels in the audio I/O buffer.
Post-processors - Any module that processes audio I/O buffer PCM data in-place after the matrix
processors. Examples are bass management, audio manager, tone control, EQ, delay, customer-specific
effects, Dolby Headphone/Virtual Speaker, etc.
The overlay structure reduces the time required to reconfigure the DSP when a processing change is
requested. Each overlay can be reloaded independently without disturbing the other overlays. For example,
when a new decoder is selected, the OS, matrix-, and post-processors do not need to be reloaded — only the
new decoder (the same is true for the other overlays).
4 Hardware Functional Description
4.1 Coyote DSP Core
The CS4970x4 is a dual-core Coyote DSP with separate X and Y data and P code memory spaces. Each core
is a high-performance, 32-bit, user-programmable, fixed-point DSP that is capable of performing two multiply
accumulate (MAC) operations per clock cycle. Each core has eight 72-bit accumulators, four X- and four Y-data
registers, and 12 index registers.
Both DSP cores are coupled to a flexible DMA engine. The DMA engine can move data between peripherals
such as the digital audio input (DAI) and digital audio output (DAO), external memory, or any DSP core
memory, all without the intervention of the DSP. The DMA engine offloads data move instructions from the DSP
core, leaving more MIPS available for signal processing instructions.
CS4970x4 functionality is controlled by application codes that are stored in on-board ROM or downloaded to
the CS4970x4 from a host MCU or external FLASH/EEPROM. Users can choose to use standard audio
decoder and post-processor modules which are available from Cirrus Logic.
The CS4970x4 is suitable for audio decoder, audio post-processor, audio encoder, DVD audio/video player,
and digital broadcast decoder applications.
4.1.1 DSP Memory
Each DSP core has its own on-chip data and program RAM and ROM and does not require external memory
for any of today’s popular audio algorithms including Dolby Digital Surround EX, AAC Multichannel, DTS-ES
96/24, and THX Ultra2. However, if the end-system design requires support of the new high-definition audio
formats, external SDRAM will be needed to support Dolby TrueHD and DTS-HD master audio.
The memory maps for the DSPs are as follows. All memory sizes are composed of 32-bit words.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CS497024-DVZ | 功能描述:IC DOLBY & DTS HD AUDIO DECODER 制造商:cirrus logic inc. 系列:CS4970xx 包装:* 零件状态:有效 类型:定点 接口:DAI/O，EBI/EMI，I2C，并联，SPI 时钟速率:25MHz 非易失性存储器:ROM（144kB） 片载 RAM:82kB 电压 - I/O:3.30V 电压 - 内核:1.80V 工作温度:-40°C ~ 85°C（TA） 安装类型:* 封装/外壳:* 供应商器件封装:* 标准包装:72 |
| CS497024-DVZR | 功能描述:IC DOLBY & DTS HD AUDIO DECODER 制造商:cirrus logic inc. 系列:CS4970xx 包装:* 零件状态:有效 类型:定点 接口:DAI/O，EBI/EMI，I2C，并联，SPI 时钟速率:25MHz 非易失性存储器:ROM（144kB） 片载 RAM:82kB 电压 - I/O:3.30V 电压 - 内核:1.80V 工作温度:-40°C ~ 85°C（TA） 安装类型:* 封装/外壳:* 供应商器件封装:* 标准包装:750 |
| CS4970X4 | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:32-bit High Definition Audio Decoder DSP Family |
| CS4970X4_09 | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:High Definition Audio Decoder DSP Family with Dual 32-bit DSP Engine Technology |
| CS4976-000 | 制造商:TE Connectivity 功能描述:44A1821-18-0/9-2-1KF/1 - Cable Rools/Shrink Tubing |
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