參數(shù)資料
型號(hào)： STV8203D
廠(chǎng)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(yè)數(shù)： 20/31頁(yè)
文件大?。?/td> 192K
代理商： STV8203D
AO-CONTROL
(AUTOSTANDARD Control)
Address
: 0E
Type
: R/W
Reset
: 0001 1111
bit 7
bit 6
bit 5
bit 4
C4 OV
bit 3
bit 2
STANDARD CHECK
bit 1
bit 0
MUTE OV
MONO OV
UNMUTE
AUTOSTANDARD controls the audio matrix when the user has selected the DAC as source (AUD-MX-
CNT bits[6:4] = 010). In thiscase it will mute the outputs or select MIN. These functionscan be overriden
by bits 6 and 7 below.
MUTEOV
: Mute override,1 = mute (overrideAUTOSTANDARD)
forces the audio signal to be muted.
MONO OV
: FM/AM Mono override, 1 = mono (override AUTOSTANDARD) forces
can beusedto forceto analoguesound.Thismaybeusefulin thecaseof marginalNICAM
reception to preventautomaticswitching.
AUD-MX-CNT bits[6:4]
bit 7
bit 6
010
0
0
X
1
0
1
1
1
1
0
AO1 source
DAC
MIN (in case of L/L’ standard)
FM (in case of B/G or I standard)
Muted (in caseof B/G or I standard)
Muted
UNMUTE
: Nicam Un-mute, 1 = unmute
allowsthe NICAMdecoder to be unmutedif the bit errorrateis higherthanthe presetlimit;
this overrides the automaticswitching to FMor AMwhich would normally occur.
: CBI4 override, 1 => CBI[4] forced to 1 internally
is usedto overridethe 4th NICAM controlbit (reservesoundswitch) if required. Thisbit is
transmitted by the broadcasterto indicate that the analoguesound carrieris a backupof
the NICAM signal; this is usually the case. If the NICAM signal fails, the STV8203 will
automaticallyswitch to backupsound if the received bit was set to 1. If this bit was set to
0 and bit 4 set to 0, the decoderwill stay switched to analogue sound. If bit 4 is set to 1,
the received CBI4 is ignored. Note that if automatic standard is off, switching between
analogueand NICAM audio must be done manually.
: Controlthechoiceoftransmissionstandardstobesearchedforbytheautomaticstandardfunction
(standardsearchactivewhenbit=1).Themorechoices,thelongerthesearchtime.Ifthesystem
in use can be identified by the characteristics of the video signal, for example by thechroma
demodulator,thenonlyasinglebitneedstobeset.Inthiscase,theAUTOSTANDARDfunction
willprogramthedemodulatorforthechosenstandard.
Ifnobitsareset,theAUTOSTANDARD
functionis disabled
andallregistersneedtobesetmanually.
bit 3 - Run checkfor standard3 (L/L’- AM/NICAM)
bit 2 - Run Check for Standard2 (B/G - FM/NICAM)
bit 1 - Run checkfor standard1 (B/G- Stereo)
bit 0 - Run checkfor standard0 (I - FM/NICAM)
AO-TIMEOUT
(AUTOSTANDARDTimerAdjustment)
Address
: 0F
Type
: R/W
Reset
: 1010 0101
C4 OV
STANDARD
CHECK
bit 7
bit 6
TIME 2 SETTING
bit 5
bit 4
bit 3
bit 2
TIME 1 SETTING
bit 1
bit 0
Time 1 is used for NICAM and FM mono validation and time 2 for Zweiton. If the standard is not found
within this time limit, the next standard will be tried. Time 1 = decimal [bit 3:0] x 32ms. Time 2 = deci-
mal [bit 7:4] x 128ms.Time 1 default value is 160ms.Time 2 default value is 1280ms.
A time of 0ms should notbe programmed.
PROGRAMMING THE DEVICE
(continued)
STV8203
20/31
相關(guān)PDF資料
PDF描述
STV8203 MULTISTANDARD TV SOUND DEMODULATOR
STV8206 Multistandard TV Audio Processor and Digital Sound Demodulator
STV8216 Multistandard TV Audio Processor and Digital Sound Demodulator
STV8226 Multistandard TV Audio Processor and Digital Sound Demodulator
STV8236 Multistandard TV Audio Processor and Digital Sound Demodulator
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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(chēng):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(chēng):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(chēng):STMicroelectronics 功能描述:VIDEO & SOUND IF SYSTEM
STV8216 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
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