參數資料
型號: TDA9874H
廠商: NXP SEMICONDUCTORS
元件分類: 接收器
英文描述: Digital TV sound demodulator/decoder
中文描述: AM/FM, AUDIO DEMODULATOR, PQFP44
封裝: 14 X 14 MM, 2.20 MM HEIGHT, PLASTIC, SOT-205-1, QFP-44
文件頁數: 25/56頁
文件大小: 254K
代理商: TDA9874H
1998 Apr 27
25
Philips Semiconductors
Preliminary specification
Digital TV sound demodulator/decoder
TDA9874H
7.3.8
FM D
EMATRIX
R
EGISTER
(FMMR)
This register is used to select the proper dematrixing characteristics as appropriate for the standard of the received
carrier and the related sound mode identification. For the dematrixing, it is assumed that the output from sound carrier 1
is on channel L input. Bits B3 to B7 are not used and should be set to logic 0.
The default setting at power-up is 00000000.
Table 29
FM Dematrix Register (subaddress 11)
Table 30
Description of FMMR bits
Table 31
Selection of the dematrixing characteristics
7
6
5
4
3
2
1
0
FDMS2
FDMS1
FDMS0
BIT
SYMBOL
FDMS2
FDMS1
FDMS0
DESCRIPTION
7
6
5
4
3
2
1
0
These 5 bits are not used and should be set to logic 0.
Dematrixing characteristics select.
The state of these 3 bits select the dematrixing
characteristics; see Table 31.
FDMS2
FDMS1
FDMS0
L OUTPUT
R OUTPUT
MODE
0
0
0
0
0
0
1
1
0
1
0
1
L input
R input
L input
R input
L input
R input
R input
L input
R input
forced mono
mono 2
dual
dual swapped
stereo Europe
1
0
0
1
0
1
stereo Korea
2L input
R input
L input
R input
+
2
L input
R input
2
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