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參數(shù)資料
| 型號： | STV8203 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | MULTISTANDARD TV SOUND DEMODULATOR |
| 中文描述： | 多標(biāo)準(zhǔn)電視伴音解調(diào)器 |
| 文件頁數(shù)： | 7/31頁 |
| 文件大小： | 192K |
| 代理商： | STV8203 |
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USING STV8203
1 - Hardware
1.a - Power Supplies
(see Figure 2)
The IC is usingtwo mainpower supplies:
- DV
DD5
supplies all the digital part V
Nom.
= 5V.
This power supply can be switched-off in stand-
by mode.
- AV
CC
suppliestheaudiomatrixpart: ifV
Nom.
= 8V
thenthe outputvoltage swing on outputpins can
reach2V
RMS
,ifV
Nom.
=5Vthentheoutputvoltage
swing on output pins can reach 1V
RMS
.
1.b- Sound Subcarrier Filters
Sound demodulation and decoding are very easy
withthisdeviceprovidingallthenecessaryfunctions
for that purpose, including the channel filters.
TheseFIRbase-bandfiltersgivethebestselectivity
ofthedesiredchannelandprovidesinNICAMmode
thecorrectcosineroll-off response.
This implies that no external filters are required
(exceptmay be a simplehigh-passfilter, ifthe saw
filters and sound IF demodulatorsused in the ap-
plicationcreate picture interferences).
Thefilters can be automaticallyset for B/G/H/I/L/L’
standards.They can also be easily tuned through
I
2
C for M, D, K,K1.
1.c- AudioMatrix
The mono output (MOUT) can output L1, R1 or
(L1+R1)/2 signal. Atypical applicationis the possi-
bilityto recordaselectedchannelin monomodeon
thelineartrackofaVCRseparatelyfromtherecord-
ingofthestereosignal,providingthefacilitytoselect
between stereo or mono signals in the playback
mode in case of marginal noise conditions.
1.d - Stand-by
Stand-bywith THRU mode : the analogpart of the
device has its own power supply (AV
CC
) allowing
thispartto keepworkingevenwhenthedigitalpart,
powered by the 5V power supply (DV
DD5
), is in
stand-by.
In this case, the audio matrix is put in a special
setting :
- LIL1 to AOL2,
- LIR1 to AOR2,
- LIL2 to AOL1,
- LIR2 to AOR1,
- input gain = 0dB.
This allows to achieve a ”THRU” mode from
SCART1 input to SCART2 output and SCART2
input to SCART1 output, providing a copy facility
from SCARTIN to SCARTOUT.
2 - Software
Twomodes of operationare available:
2.a - OptimizedProgramMode
Fourstandardshavedefault settingstoredin order
to allow a very easy programmation. Only some
registersmay have to be programmed(these reg-
istersare shownin boldin theFigure3)but inmost
cases, the reset values will be sufficient. In Fig-
ure3,CTLandSTATrepresentregisterswhichare
controlledby the ”standardprocessor”.Thesereg-
isters are located between address 23Hex and
3CHex in the completelist of registers.
2.b - AdvancedOperationMode
In that mode, all the read/write registers (as men-
tionned in the complete list) can be programmed
manuallyand changedfromtheir reset values.
The additionnal registers accessible in this mode
are shown in bold in Figure 4. This mode can be
selected byputting the bits [3:0] of AO-CONTROL
registerto 0.
41
11
21
AV
CC
DV
DD5
GND
AUDIO
MATRIX
DEMODULATION
AND CONTROL PART
Pins5-32-42
GND
8
Figure 2
STV8203
7/31
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| STV8203D | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MULTISTANDARD TV SOUND DEMODULATOR |
| STV8206 | 功能描述:視頻 IC Audio Proc/Dig Demod RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| STV8207 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders |
| STV8207T | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders |
| STV8211 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:VIDEO & SOUND IF SYSTEM |
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