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參數(shù)資料
| 型號： | SAA6752HS |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | MPEG-2 video and MPEG-audio/AC-3 audio encoder with multiplexer |
| 中文描述： | MPEG - 2視頻和MPEG-audio/AC-3音頻編碼器與復(fù)用器 |
| 文件頁數(shù)： | 34/71頁 |
| 文件大?。?/td> | 2570K |
| 代理商： | SAA6752HS |
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2004 Jan 26
34
Philips Semiconductors
Product specification
MPEG-2 video and MPEG-audio/AC-3
audio encoder with multiplexer
SAA6752HS
7.9
Clock generation
7.9.1
G
ENERAL
The SAA6752HS is designed to operate with a single
fundamental 27 MHz crystal or an external 27 MHz clock.
From these clock sources an internal PLL produces the
27 MHz, 54 MHz and 108 MHz frequencies needed for
operation.
It is possible to use a third overtone crystal in combination
with a 9 MHz external trap. In this event Clock mode 2 and
tuning by the I
2
C-bus commands are not usable.
7.9.2
C
LOCK CONFIGURATION OPTIONS
The following configuration options can be selected from
the host:
CLOCK MODE. Dependent on the type of application
(i.e. video frame locked, reference clock locked etc.),
three different clock modes are available
CLOCK SOURCE. The clock can be generated from an
internal crystal controlled clock or an external source.
If from a crystal then a fine tune adjustment is available
CLOCKOUTPUT.Itispossibletoenableasystemclock
output so that the 27 MHz clock can be used elsewhere
by the user.
7.9.3
C
LOCK
M
ODES
The SAA6752HS internal PLL can be configured in three
differentclock modes:Clockmodes 1,2and 3.Adefinition
of the clock modes is shown in Table 9. The clock modes
are intended for different applications:
Clock mode 1. System clock reference locked to input
video frame frequency. Intended for applications where
the output stream is recorded directly onto a medium
(i.e. DVD video recorder).
Clock mode 2. Crystal locked to input video frame
frequency. Intended for applications that require both
recording and direct playback. However it is limited by
the required accuracy of the input video frame frequency
Clock mode 3. Crystal free-running. Intended for
applications where the output stream is played real time
directly by a decoder.
To meet the requirements for each clock mode the
conditions specified in Table 10 must be met.
Table 9
Clock modes
Note
1.
The stream contents are MPEG-compliant but the time stamps are not synchronized with real time (i.e. dependent
on the accuracy of the video input frame frequency). Playback of such a stream is MPEG-compliant due to the
re-generation of time synchronization.
Table 10
Clock modes requirements
Note
1.
The nominal video frame frequency is dependent on the video mode set: 525 or 625 lines.
CLOCK
MODE
OUTPUT STREAM
TIME-STAMP COMPLIANCE
DVD-compliant
(1)
DVD and MPEG-compliant
SYSTEM FREQUENCY
SYSTEM CLOCK REFERENCE FREQUENCY
1
2
crystal frequency
27 MHz
±
video frame
frequency accuracy
crystal frequency
27 MHz
±
video frame frequency accuracy
27 MHz
±
video frame frequency accuracy
3
MPEG-compliant
crystal frequency
CLOCK
MODE
CRYSTAL FREQUENCY
EXTERNAL
CLOCK FREQUENCY
27 MHz
±
0.1%
not applicable
INPUT VIDEO FRAME FREQUENCY
(1)
1
2
27 MHz
±
0.1%
27
×
(1
±
200
×
10
6
) MHz
(to allow fine tuning via PLL)
27
×
(1
±
30
×
10
6
) MHz
nominal
8% to nominal + 2%
nominal
×
(1
±
200
×
10
6
)
3
27
×
(1
±
30
×
10
6
) MHz
not applicable
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA6752HS/V103 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:MPEG-2 video and MPEG-audio/AC-3 audio encoder with multiplexer |
| SAA6752HS/V103,557 | 功能描述:IC AUD/VID ENCODER MPEG 208-SQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉(zhuǎn)換器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 26/Apr/2011 標(biāo)準(zhǔn)包裝:1 系列:- 類型:編碼器 應(yīng)用:DVB-S.2 系統(tǒng) 電壓 - 電源，模擬:- 電壓 - 電源，數(shù)字:- 安裝類型:- 封裝/外殼:模塊 供應(yīng)商設(shè)備封裝:模塊 包裝:散裝 其它名稱:Q4645799 |
| SAA6752HS/V104 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:MPEG-2 video and MPEG-audio/AC-3 audio encoder with multiplexer |
| SAA6752HS/V104,557 | 功能描述:IC AUD/VID ENCODER MPEG 208-SQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉(zhuǎn)換器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 26/Apr/2011 標(biāo)準(zhǔn)包裝:1 系列:- 類型:編碼器 應(yīng)用:DVB-S.2 系統(tǒng) 電壓 - 電源，模擬:- 電壓 - 電源，數(shù)字:- 安裝類型:- 封裝/外殼:模塊 供應(yīng)商設(shè)備封裝:模塊 包裝:散裝 其它名稱:Q4645799 |
| SAA7000 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:CD機(jī)插補(bǔ)靜音器 |
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