參數(shù)資料
型號: TDA9874H
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(shù): 39/56頁
文件大?。?/td> 254K
代理商: TDA9874H
1998 Apr 27
39
Philips Semiconductors
Preliminary specification
Digital TV sound demodulator/decoder
TDA9874H
7.4.4
D
ATA
R
EGISTERS
(DR1
AND
DR2)
The contents of these two registers provide information on the additional data bits. ADBYTE0 is stored at subaddress 3.
Table 64
Data Register 1 (subaddress 3)
Table 65
Description of DR1 bits
Table 66
Data Register 2 (subaddress 4)
Table 67
Description of DR2 bits
7
6
5
4
3
2
1
0
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
BIT
SYMBOL
DESCRIPTION
7 to 0
AD7 to AD0
The lower 8 bits of the additional data word.
7
6
5
4
3
2
1
0
OVW
SAD
CI1
CI2
AD10
AD9
AD8
BIT
SYMBOL
DESCRIPTION
7
OVW
If this bit is HIGH, new additional data bits are written to the IC without the previous bits
being read.
When SAD = 1, new additional data is written into the IC. This bit is reset, when the
additional data bits are read.
Value is undefined.
These 2 bits are CI bits decoded by majority logic from the parity checks of the last ten
samples in a frame.
6
SAD
5
4
3
2
1
0
CI1
CI2
AD10
AD9
AD8
The upper 3 bits of the additional data word.
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