參數(shù)資料
型號: TDA9875A
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): 37/96頁
文件大小: 296K
代理商: TDA9875A
1999 Dec 20
37
Philips Semiconductors
Product specification
Digital TV Sound Processor (DTVSP)
TDA9875A
10.3.3
M
ONITOR 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 I
2
C-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
0
0
0
selects the peak level of a source to be monitored
the last sample will be supplied
default value
default value
monitor output (see Table 18)
6
5
4
3
2
1
B6
B5
B4
B3
B2
B1
B0
signal source (see Table 19)
0 (LSB)
B4
B3
MONITOR OUTPUT
0
0
0
1
1
0
L input (channel 1, respectively)
R input (channel 2, respectively)
B2
B1
B0
SIGNAL SOURCE
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
DC output of FM demodulator
audio magnitude/phase, FM demodulator output
crossbar input from FM/AM channel
crossbar input from NICAM channel
crossbar input from I
2
S1 channel
crossbar input from I
2
S2 channel
crossbar input from audio ADC channel
input to Main channel DAC (without beeper)
L input
R input
+
2
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