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參數(shù)資料
| 型號： | TDA9870A |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | Digital TV Sound Processor DTVSP |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP64 |
| 封裝： | SHRINK, PLASTIC, DIP |
| 文件頁數(shù)： | 35/88頁 |
| 文件大?。?/td> | 362K |
| 代理商： | TDA9870A |
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1998 Aug 10
35
Philips Semiconductors
Product specification
Digital TV Sound Processor (DTVSP)
TDA9870A
Table 20
Monitor output
10.3.3.3
Note
By reading out level read-out registers
(subaddresses 5 and 6, see Section 10.4), the current
peak level will be reset.
10.3.4
C
ARRIER
1
FREQUENCY REGISTER
10.3.4.1
Description
The three bytes together constitute a 24-bit frequency
control word to represent the sound carrier (i.e. mixer)
frequency in accordance with the following formula:
f
clk
Where:
data = 24-bit frequency control word.
f
mix
= desired sound carrier frequency.
f
clk
= 12.288 MHz (clock frequency of mixer).
2
24
= 16777216 (number of steps in a 24-bit word size).
Example: A 5.5 MHz sound carrier frequency will be
generated by sending the following sequence of data
bytes to the TDA9870A (data = 7509333 in decimal
notation or 729555 in HEX): 01110010 10010101
01010101.
As three bytes are required to define a carrier frequency,
execution of this command starts only after all bytes have
been received. If an error occurs, e.g. a premature STOP
condition, partial data for this function is ignored.
The default setting at power-up is 00000000 for all three
bytes.
B4
B3
MONITOR OUTPUT
0
0
0
1
1
0
L input (channel 1, respectively)
R input (channel 2, respectively)
L input
R input
+
2
data
-f
2
24
×
=
10.3.4.2
Definition
Most significant part at subaddress 3.
Table 21
Subaddresses 3 to 5
10.3.5
C
ARRIER
2
FREQUENCY REGISTER
10.3.5.1
Description
Same as for sound carrier 1.
If the carrier 2 frequency register is used, it will be for the
second FM sound carrier of a terrestrial or satellite FM
program.
BIT
SUBADDRESSES
7 (MSB)
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0 (LSB)
3
4
5
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相關(guān)代理商/技術(shù)參數(shù) |
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| TDA9873 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard dual carrier stereo sound decoder |
| TDA9873H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard dual carrier stereo sound decoder |
| TDA9873HS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard dual carrier stereo sound decoder |
| TDA9874A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV sound demodulator/decoder |
| TDA9874AH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV sound demodulator/decoder |
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