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參數資料
| 型號： | 93526374518 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 接收器 |
| 英文描述： | FM, AUDIO DEMODULATOR, PQFP44 |
| 封裝： | PLASTIC, SOT-205, QFP-44 |
| 文件頁數： | 42/71頁 |
| 文件大小： | 269K |
| 代理商： | 93526374518 |
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2000 Aug 04
47
Philips Semiconductors
Product specication
Digital TV sound demodulator/decoder
TDA9874A
7.4.4
DATA REGISTERS DR1 AND DR2
The contents of these two registers provide information on the additional data bits. AD byte 0 is stored at subaddress 3.
Table 78 Data register DR1 (subaddress 3)
Table 79 Description of the data register DR1 bits
Table 80 Data register DR2 (subaddress 4)
Table 81 Description of the data register DR2 bits
76543210
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
BIT
SYMBOL
DESCRIPTION
7
AD7
the lower 8 bits of the additional data word
6
AD6
5
AD5
4
AD4
3
AD3
2
AD2
1
AD1
0
AD0
76543210
OVW
SAD
CI1
CI2
AD10
AD9
AD8
BIT
SYMBOL
DESCRIPTION
7
OVW
If this bit is logic 1 new additional data bits are written to the IC without the previous bits
being read.
6
SAD
If bit SAD = 1 new additional data is written into the IC. This bit is reset when the
additional data bits are read.
5
this bit is undened
4
CI1
These bits are CI bits decoded by majority logic from the parity checks of the last ten
samples in a frame.
3
CI2
2
AD10
the upper 3 bits of the additional data word
1
AD9
0
AD8
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