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| 型號： | SAF7849HL |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 存儲器 |
| 英文描述： | One chip CD audio device with integrated MP3-WMA decoder |
| 封裝： | SAF7843HL/M295<SOT486-1 (LQFP144)|<<http://www.nxp.com/packages/SOT486-1.html<1<Always Pb-free,;SAF7849HL/M245<SOT486-1 (LQFP144)|<<http://www.nxp.com/packages/SOT486-1.h |
| 文件頁數(shù)： | 63/93頁 |
| 文件大?。?/td> | 396K |
| 代理商： | SAF7849HL |
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SAF784X_2
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 02 — 9 May 2008
63 of 93
NXP Semiconductors
SAF784x
One chip CD audio device with integrated MP3/WMA decoder
6.8.1
Supported modes of operation
The block decoder supports CD-DA and CD-ROM decode transfers.
CD main data and subcode data are received from CD-Slim over the C2I interface. The
main data is processed by the decode main data path functions before being passed to
the memory controller. In the memory controller the main data is assimilated with the
subcode data and the C3 error corrector is run on CD-ROM main data. The sector data
and some status information are then passed to the SAF784x segment manager over the
MiMeD2 interface.
6.8.2
Channel decoder to block decoder interface (C2I)
The data interface between the channel decoder and the block decoder is an
asynchronous interface; the channel decoder and the block decoder operate in
independent clock domains.
Data is transferred over C2I in bursts of one EFM frame. Each EFM frame consists of one
subcode data byte plus twelve 16-bit main data words with associated reliability flags.
CD-ROM data is word-aligned as per the CD Yellow Book (ISO/IEC 10149)with the first
word of the CD-ROM sync pattern appearing on a left audio word. The subcode sync may,
or may not, be aligned with the first word of the CD-ROM sync pattern depending on the
alignment on the disc.
Subcode data is provided at the rate of one byte per EFM frame. Each byte contains a bit
for each of the subcode channels, P-W (P channel is bit 7).
Fig 35. Block decoder data path
001aag346
AHB
bus
C2I
silicon
debug
bus
MiMeD2
ARM AHB REGISTER
INTERFACE
CD-ROM
SYNC
DETECTOR
CHANNEL
DECODER
INTERFACE
CD SUBCODE
DATA PATH
SEGMENTATION MANAGER
INTERFACE
CD main data
CD subcode data
CD subcode data
SECTOR
SYNC
FLYWHEEL
DECODE MAIN DATA PATH
CD MAIN DATA
CD-ROM
MSF
FLYWHEEL
STREAM
FILTER
(START/STOP)
CD MEMORY
CONTROLLER
SRAM
CD-ROM
DE-SCRAMBLER
CD-ROM C3 ERROR
CORRECTOR
CD-ROM
main data
CD data
SILICON DEBUG BUS
INTERFACE
(BLOCK VERIFICATION)
read/write/debug
debug
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAF7849HL/M245,557 | 功能描述:音頻 DSP IC AUD DECODER RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| SAF7849HL/M295,557 | 功能描述:音頻 DSP IC AUD DECODER RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| SAF7860HL/M2,557 | 制造商:NXP Semiconductors 功能描述:DSP |
| SAF82520PVB2 | 制造商:SIEMENS 功能描述:New |
| SAF82525 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Data Communications ICs |
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