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參數(shù)資料
| 型號： | SAA7373 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Digital servo processor and Compact Disc decoder CD7 |
| 中文描述： | 數(shù)字伺服處理器和CD7抗原光盤解碼器 |
| 文件頁數(shù)： | 9/60頁 |
| 文件大?。?/td> | 323K |
| 代理商： | SAA7373 |
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1998 Jul 06
9
Philips Semiconductors
Product specification
Digital servo processor and Compact Disc
decoder (CD7)
SAA7373
7.2
Crystal oscillator
The crystal oscillator is a conventional 2 pin design
operating between 8 and 35 MHz. This oscillator is
capable of operating with ceramic resonators also with
both fundamental and third overtone crystals. External
components should be used to suppress the fundamental
output of the third overtone crystals as shown in Figs 3
and 4. Typical oscillation frequencies required are 8.4672,
16.9344 or 33.8688 MHz depending on the internal clock
settings used and whether or not the clock multiplier is
enabled.
Fig.3 8.4672 MHz fundamental configuration.
8.4672 MHz
CRIN
CROUT
SAA7373
22 pF
22 pF
330
100 k
OSCILLATOR
MGR323
Fig.4 33.8688 MHz overtone configuration.
OSCILLATOR
33.8688 MHz
CRIN
CROUT
SAA7373
3.3
μ
H
1 nF
10 pF
10 pF
330
100 k
MGR324
7.3
Data slicer and clock regenerator
The SAA7373 has an integrated slice level comparator
which can be clocked by the crystal frequency clock, or
8 times the crystal frequency clock (if SELPLL is set HIGH
while using an 8.4672 MHz crystal, and register 4 is set
to 0xxx). The slice level is controlled by an internal current
source applied to an external capacitor under the control
of the Digital Phase-Locked Loop (DPLL).
Regeneration of the bit clock is achieved with an internal
fully digital PLL. No external components are required and
the bit clock is not output. The PLL has two registers
(8 and 9) for selecting bandwidth and equalization.
For certain applications an off-track input is necessary.
This is internally connected from the servo part (its polarity
can be changed by the foc_parm1 parameter), but may be
input via the V1 pin if selected by register C. If this flag is
HIGH, the SAA7373 will assume that its servo part is
following on the wrong track and will flag all incoming HF
data as incorrect.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA7373GP | Digital servo processor and Compact Disc decoder CD7 |
| SAA7374 | Low voltage digital servo processor and Compact Disc decoder CD7LV |
| SAA7374GP | Low voltage digital servo processor and Compact Disc decoder CD7LV |
| SAA7376 | Digital servo processor and Compact Disc decoder CD7 |
| SAA7377GP | Force/Pressure transducer; Compensated; Pressure Range: 0 to 25 psi |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA7373GP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital servo processor and Compact Disc decoder CD7 |
| SAA7374 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low voltage digital servo processor and Compact Disc decoder CD7LV |
| SAA7374GP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low voltage digital servo processor and Compact Disc decoder CD7LV |
| SAA7376 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital servo processor and Compact Disc decoder CD7 |
| SAA7377 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital servo processor and Compact Disc decoder CD7 |
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