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參數資料
| 型號： | TDA9874AH |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 接收器 |
| 英文描述： | Digital TV sound demodulator/decoder |
| 中文描述： | AM/FM, AUDIO DEMODULATOR, PQFP44 |
| 封裝： | 14 X 14 MM, 2.20 MM HEIGHT, PLASTIC, SOT-205-1, QFP-44 |
| 文件頁數： | 53/68頁 |
| 文件大?。?/td> | 231K |
| 代理商： | TDA9874AH |
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1999 Dec 03
53
Philips Semiconductors
Preliminary specification
Digital TV sound demodulator/decoder
TDA9874A
10.4.1
D
EVICE
S
TATUS
R
EGISTER
(DSR)
Table 75
Device status register (subaddress 0)
Table 76
Description of the DSR bits
10.4.2
NICAM S
TATUS
R
EGISTER
(NISR)
Table 77
NICAM status register (subaddress 1)
7
6
5
4
3
2
1
0
P2IN
P1IN
RSSF
AMSTAT
VDSP
IDDUA
IDSTE
PFR
BIT
SYMBOL
DESCRIPTION
7
P2IN
Input from Port 2:
this bit reflects the status of the P2 general purpose port pin;
see Section 10.3.3. If P2IN = 1, then the P2 general purpose port pin is HIGH.
If P2IN = 0, then the P2 general purpose port pin is LOW.
Input from Port 1:
this bit reflects the status of the P1 general purpose port pin;
see Section 10.3.3. If P1IN = 1, then the P1 general purpose port pin is HIGH.
If P1IN = 0, then the P1 general purpose port pin is LOW.
Reserve Sound Switching Flag:
when RSSF = 1, this bit is a copy of the C4 bit in the
NICAM status register (see Section 10.4.2). It indicates that the FM (or AM for
standard L) sound matches the digital transmission and auto-muting should be enabled.
When RSSF = 0, auto-muting should be disabled, as analog and digital sound are
different.
Auto-mute Status:
if this bit is HIGH, it indicates that the auto-muting function has
switched from NICAM to the program of the first sound carrier (i.e. FM mono or AM in
NICAM L systems)
Identification of NICAM sound:
when VDSP = 1, it indicates that digital transmission
is a sound source. When VDSP = 0, it indicates that the transmission is either data or a
currently undefined format.
Identification of FM dual sound; A2 systems:
if IDDUA = 1, an FM dual-language
signal has been identified. When neither IDSTE nor IDDUA = 1, the received signal is
assumed to be FM mono (A2 systems only).
Identification of FM stereo; A2 systems:
if IDSTE = 1, an FM stereo signal has been
identified (A2 systems only)
Power failure register:
the power supply for the digital part of the device (V
DDD1
) has
temporarily been lower than the specified lower limit. If this is detected an initialization of
the device has to be carried out to ensure reliable operation.
6
P1IN
5
RSSF
4
AMSTAT
3
VDSP
2
IDDUA
1
IDSTE
0
PFR
7
6
5
4
3
2
1
0
C4
C3
C2
C1
OSB
CFC
S/MB
D/SB
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TDA9874AH/V2,557 | 功能描述:音頻放大器 DIGITAL STEREO DECODER VCR RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA9874AHB | 功能描述:音頻放大器 DIGITAL STEREO DECODER VCR RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA9874APS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV sound demodulator/decoder |
| TDA9874H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV sound demodulator/decoder |
| TDA9875 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV Sound Processor DTVSP |
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