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參數(shù)資料
| 型號： | TDA9875AH/V2,557 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | PLASTIC, QFP |
| 文件頁數(shù)： | 31/96頁 |
| 文件大小： | 324K |
| 代理商： | TDA9875AH/V2,557 |
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1999 Dec 20
37
Philips Semiconductors
Product specication
Digital TV Sound Processor (DTVSP)
TDA9875A
10.3.3
MONITOR SELECT REGISTER
This register is used to define the signal source, the level of which is to be monitored, and if the peak level is to be
monitored. Peak level refers to the magnitude of the maximum excursion of a signal.
Audio magnitude/phase is related to the FM demodulator output. Phase information is provided, when it operates in
FM mode, while magnitude is supplied in AM mode.
Data can be read-out in the I2C-bus slave transmitter mode. By reading out level read-out registers (see Section 10.4)
the current peak level will be reset.
Table 17 Subaddress 2 (note 1)
Note
1. The default setting at power-up is 0000 0000.
Table 18 Monitor output
Table 19 Signal source (note 1)
Note
1. The term ‘crossbar’ refers to the digital selector, where level-adjusted signals from various sources are available.
BIT
NAME
VALUE
DESCRIPTION
7 (MSB)
PEAKMON
1
selects the peak level of a source to be monitored
0
the last sample will be supplied
6
B6
0
default value
5
B5
0
default value
4B4
monitor output (see Table 18)
3B3
2B2
signal source (see Table 19)
1B1
0 (LSB)
B0
B4
B3
MONITOR OUTPUT
00
0
1
L input (channel 1, respectively)
1
0
R input (channel 2, respectively)
B2
B1
B0
SIGNAL SOURCE
0
DC output of FM demodulator
0
1
audio magnitude/phase, FM demodulator output
0
1
0
crossbar input from FM/AM channel
0
1
crossbar input from NICAM channel
1
0
crossbar input from I2S1 channel
1
0
1
crossbar input from I2S2 channel
1
0
crossbar input from audio ADC channel
1
input to Main channel DAC (without beeper)
L input
R input
+
2
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