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參數(shù)資料
| 型號： | SAF7843HL |
| 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)： | 16/93頁 |
| 文件大?。?/td> | 396K |
| 代理商： | SAF7843HL |
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SAF784X_2
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 02 — 9 May 2008
16 of 93
NXP Semiconductors
SAF784x
One chip CD audio device with integrated MP3/WMA decoder
6.5 Channel decoder
6.5.1
Features
The channel decoder in the SAF784x is derived from the design used in the SAA7817HL
DVD decoder IC. The design has been optimized for CD decode functionality (EFM and
demodulation is removed) and has the following features:
One-channel interface to the on-chip 6-bit 67 MHz ADC
Signal conditioning logic with high-pass filter, DC-offset cancellation (AOC) and AGC
logic
HF defect detection circuitry with automatic hold of AGC, AOC, HPF, PLL and slicer on
defect detection
Digital equalizer, noise filter, PLL and slicer
Run Length 2 (RL2) push back mechanism
EFM demodulator with sync interpolation
CD text and subcode Q-channel extraction blocks with software interface via registers
Decoding, de-interleaving and Reed-Solomon error correction according to CD CIRC
standards
On-chip de-interleaving SRAM memory
Audio processing back end with interpolate/hold, mute, kill and silence detect logic,
de-emphasis and 4
×
upsample filter
Two data output interfaces: I
2
S and EBU
One serial subcode output interface (V4)
Motor control for CLV (locked-on EFM) or CAV (locked-on tacho) or open loop or
software-controlled regulation with one or two motor pins
On-board tacho measurement with one or three Hall sensor inputs (T1 to T3), that
provides frequency input for motor loop; the sensor inputs are shared with GPIO pins
8-bit register map, with AHB slave interface
An interrupt output with associated interrupt, status and interrupt enable registers for
full interrupt-driven operation
Debug information available via Meas1 (CL1, pin 97) and pin CFLG (pin 95) and
parallel debug bus
6.5.2
Block diagram
The incoming diode signals are first added and processed in the analog front end to
create a normal RF (HF) signal and then converted to digital by the ADC. This signal is
then resampled from the ADC clock to the system clock domain via the
integrate-and-dump block. Offset and gain on the RF signal is removed via the AGC/AOC
loop (via the analog front end). Any remaining offset which is not removed by the analog
front end can be removed via the digital HPF. The RF signal is then sliced by the bit
detector, clock recovery is done by a full digital PLL with noise filter, equalizer and
sample-rate convertor. A defect detector allows AGC, AOC, HPF, slicer and PLL to be held
during black or white dots. At this point in the data path, RF samples are converted into a
bit stream. The RL2 push back avoids RL3s in the RF being accidently translated into RL1
or RL2 in the bit stream. The channel bit stream is demodulated in to bytes by the EFM
demodulator. Q-channel subcode and CD-text information is extracted via the Q-subcode
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAF7843HL/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 |
| SAF7846HL/M210,557 | 功能描述:音頻 DSP 1 chip CD Audio Dev w/Integrated 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 |
| SAF7847HL/M201,557 | 功能描述:音頻 DSP 1 chip CD Audio Dev w/Integrated 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/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 |
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