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): 44/88頁
文件大?。?/td> 362K
代理商: TDA9870A
1998 Aug 10
44
Philips Semiconductors
Product specification
Digital TV Sound Processor (DTVSP)
TDA9870A
10.3.17 SCART 1
OUTPUT SELECT REGISTER
10.3.17.1 Description
This register is used to define both the signal source to be output at SCART 1 and the output channel selector mode.
10.3.17.2 Definition
Table 39
Subaddress 20 (note 1)
Notes
1.
2.
The default setting at power-up is 00000001.
See Table 42.
Table 40
Signal source
Table 41
Bits B5 and B4
Table 42
Description of bit SC1GAIN
MSB
LSB
B7
0
B6
B5
B4
B3
0
B2
B1
B0
SC1GAIN
(2)
see Table 41
see Table 40
B2
B1
B0
SIGNAL SOURCE
0
0
0
0
1
0
0
1
1
0
0
1
0
1
0
SCART 1 input
SCART 2 input
external input
mono input
DAC input
B5
B4
L OUTPUT
R OUTPUT
0
0
1
1
0
1
0
1
L input
L input
R input
R input
R input
L input
R input
L input
NAME
HIGH/LOW
FUNCTION
SC1GAIN
HIGH
Activates the 3 dB gain stage at the SCART 1 output buffers. As any SCART input
passes a 3 dB attenuator, this gain stage can be used to compensate that attenuation,
resulting in a 0 dB insertion loss when copying from SCART 2 input to SCART 1 output.
However, that gain must be used with great care, as it will cause signal clipping at high
input levels.
The audio signal will be output unchanged (0 dB gain).
LOW
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