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參數(shù)資料
| 型號： | TDA9870A |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 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)： | 31/88頁 |
| 文件大?。?/td> | 362K |
| 代理商： | TDA9870A |
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1998 Aug 10
31
Philips Semiconductors
Product specification
Digital TV Sound Processor (DTVSP)
TDA9870A
Note
1.
These bits have not been assigned to a function.
The following sub-sections provide a detailed description of the slave receiver registers:
10.3.1
AGC
GAIN REGISTER
10.3.1.1
Description
If the automatic gain control function is switched off in the general configuration register, the contents of this register will
define a fixed gain of the AGC stage. The input voltages given are meant to generate a full scale output from the SIF
ADC. If automatic gain control is on, the AGCGAIN setting is ignored. After switching off the automatic gain control
function, the latest gain control setting is copied to the AGC gain register. If the AGC input level shift bit AGCLEV is set
to HIGH the input signal is scaled with
10 dB. The AGCLEV bit is also active if the automatic gain function is enabled.
It should be noted that the input voltages should be considered as approximate target values.
Table 13
Description of the AGC gain register
38
39
40
41
42
43
44
45
0
0
0
0
0
0
0
b
0
0
m
0
0
0
0
b
0
0
m
0
0
0
v
b
i
i
i
i
i
I
2
S1 input level adjust
I
2
S1 output level adjust
I
2
S2 output select
I
2
S2 input level adjust
I
2
S2 output level adjust
beeper frequency
beeper volume, Main and Auxiliary
bass boost, Main left and right
o
m
i
o
0
v
b
o
0
i
o
0
v
b
o
s
i
o
f
v
b
o
s
i
o
f
v
b
o
s
i
o
f
v
b
BIT
NAME
AGCLEV
DESCRIPTION
7 (MSB)
6
5
set to logic 0
set to logic 0
If the AGC input level shift bit AGCLEV is set to HIGH the input signal is scaled with
10 dB.
The AGCLEV bit is also active if the automatic gain function is enabled.
AGCGAIN If the automatic gain control function is switched off in the general configuration register, the
contents of this register will define a fixed gain of the AGC stage.
4
3
2
1
0 (LSB)
SUBADDRESS
(DECIMAL)
DATA
FUNCTION
MSB
LSB
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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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