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TEF6890H データシート(Datasheet) 34 Page - NXP Semiconductors

部品番号. TEF6890H
部品情報  Car radio integrated signal processor
ダウンロード  55 Pages
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メーカー  PHILIPS [NXP Semiconductors]
ホームページ  http://www.nxp.com
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 34 page
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2003 Oct 21
34
Philips Semiconductors
Product specification
Car radio integrated signal processor
TEF6890H
11.2.7
SUBADDRESS 9H; SOFTMUTE
Table 33 Format of data byte 9H with default setting
Table 34 Description of data byte 9H
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
MST2
MST1
MST0
MSL1
MSL0
UMD1
UMD0
SMON
01101011
BIT
SYMBOL
DESCRIPTION
7 to 5
MST[2:0]
Soft mute start.
αmute = 3 dB; see Fig.12.
4 and 3
MSL[1:0]
Soft mute slope. See Fig.13.
2 and 1
UMD[1:0]
USN mute depth. Maximum soft mute attenuation of the soft mute via USN control;
see Fig.14.
0
SMON
Soft mute enable. 0 = disable; 1 = enable.
handbook, halfpage
0.25
0.75
Veq (V)
1.25
1.75
α
mute
(dB)
2.25
0
60
48
36
24
12
MHC339
(1)
(5)
(6)
(7)
(8)
(2) (3) (4)
Fig.12 Soft mute attenuation
αmute as a function of
equivalent level voltage Veq (start).
(5)
MST[2:0] = 100 = 1.25 V.
(6)
MST[2:0] = 101 = 1.5 V.
(7)
MST[2:0] = 110 = 1.75 V.
(8)
MST[2:0] = 111 = 2 V.
MSL[1:0] = 11
(1)
MST[2:0] = 000 = 0.75 V.
(2)
MST[2:0] = 001 = 0.88 V.
(3)
MST[2:0] = 010 = 1 V.
(4)
MST[2:0] = 011 = 1.12 V.
handbook, halfpage
0.25
0.5
1.5
Veq (V)
0
6
18
24
12
0.75
1
α
mute
(dB)
1.25
MHC340
(4)
(2)
(1)
(3)
Fig.13 Soft mute attenuation
αmute as a function of
equivalent level voltage Veq (slope).
MST[2:0] = 000
(1) MSL[1:0] = 00 = 8 dB/V.
(2) MSL[1:0] = 01 = 16 dB/V.
(3) MSL[1:0] = 10 = 24 dB/V.
(4) MSL[1:0] = 11 = 32 dB/V.




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