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參數(shù)資料
| 型號： | TDA9875AH/V2,557 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | PLASTIC, QFP |
| 文件頁數(shù)： | 80/96頁 |
| 文件大小： | 324K |
| 代理商： | TDA9875AH/V2,557 |
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1999 Dec 20
81
Philips Semiconductors
Product specication
Digital TV Sound Processor (DTVSP)
TDA9875A
10.4.1
DEVICE STATUS REGISTER
Table 90 Subaddress 0
BIT
NAME
VALUE
DESCRIPTION
7 (MSB)
P2IN
This bit reects the status of the corresponding general purpose port of pin P2
(see Section 10.3.2).
6
P1IN
This bit reects the status of the corresponding general purpose port of pin P1
(see Section 10.3.2).
5
RSSF
1
Reserve sound switching ag: this bit is a copy of the C4 bit in the NICAM status
register. It indicates that the FM (or AM for standard L) sound matches the
digital transmission and auto-muting should be enabled.
0
Auto-muting should be disabled, as analog and digital sound are different.
4
AMSTAT
1
Auto-mute status: it indicates that the auto-muting function has switched from
NICAM to the program of the rst sound carrier (i.e. FM mono or AM in the
NICAM L system) or to the ADC (depending on bit AMSEL).
0
Auto-muting function has not switched.
3
VDSP
1
Indicates that digital transmission is a sound source (NICAM).
0
The transmission is either data or currently undened format (NICAM).
2
IDDUA
This bit is logic 1 if an FM dual-language signal has been identied. When
neither IDSTE nor IDDUA are set, the received signal has to be assumed to be
FM mono.
1
IDSTE
This bit is logic 1 if an FM stereo signal has been identied.
0 (LSB)
POR
Power fail bit: the power supply for the digital part of the device, VDDD2, has
temporarily been lower than the specied lower limit. If this is detected an
initialization of the TDA9875A has to be carried out to ensure a reliable
operation.
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