2003 Oct 21 40
Philips Semiconductors Product specification
Car radio integrated signal processor TEF6892H
Table 61 Input gain Table 62 Noise blanker sensitivity
ING1 ING0
GAIN FOR
FMMPX INPUT
(dB)
GAIN FOR AM
AND MPXRDS
INPUT (dB)
00 0 0
01 3 3
10 6 6
1 1 23.5 0
NBS1 NBS0
SENSITIVITY
OF FM NOISE
BLANKER AT
MPXRDSINPUT
(mV)
SENSITIVITY
OF AM NOISE
BLANKER (%)
0 0 90 110
0 1 150 140
1 0 210 175
1 1 270 220
Fig.15 De-emphasis gain G
de-em
as a function of audio frequency f
audio
.
(1) τ
de-em
=50µs.
(2) τ
de-em
=75µs.
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20
16
12
8
4
22
18
14
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6
2
6
4
2
0
MHC342
10
(1)
(2)
G
de-em
(dB)
f
audio
(Hz)
10
2
10
3
10
4
10
5
2003 Oct 21 41
Philips Semiconductors Product specification
Car radio integrated signal processor TEF6892H
11.2.12 SUBADDRESS BH; INPUT AND ASI
Table 63 Format of data byte BH with default setting
Table 64 Description of data byte BH
Table 65 FM noise blanker level sensitivity
Table 66 Audio input tone/volume part
Table 67 Audio step interpolation time constant
11.2.13 S
UBADDRESS CH; LOUDNESS
Table 68 Format of data byte CH with default setting
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
NBL1 NBL0 INP1 INP0 MUTE ASI AST1 AST0
10001100
BIT SYMBOL DESCRIPTION
7 and 6 NBL[1:0] FM noise blanker level sensitivity. See Table 65.
5 and 4 INP[1:0] Audio input tone/volume part. See Table 66.
3 MUTE Audio mute. 0 = no mute; 1 = mute.
2 ASI Audio step interpolation. 0 = disable; 1 = enable.
1 and 0 AST[1:0] Audio step interpolation time constant. ASI time is 0 s when ASI = 0; see Table 67.
NBL1 NBL0 SENSITIVITY OF FM NOISE BLANKER AT LEVEL INPUT (mV)
00 9
01 18
10 28
1 1 reserved
INP1 INP0 AUDIO INPUT FOR TONE/VOLUME PART
0 0 radio
01 CD
1 0 tape
1 1 phone
AST1 AST0 ASI TIME (ms)
00 1
01 3
10 10
11 30
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
LDN4 LDN3 LDN2 LDN1 LDN0 LLF LHB
0000011
2003 Oct 21 42
Philips Semiconductors Product specification
Car radio integrated signal processor TEF6892H
Table 69 Description of data byte CH, see Figs 16 to 19
Table 70 Loudness gain
BIT SYMBOL DESCRIPTION
7 Not used. Set to logic 0.
6 to 2 LDN[4:0] Loudness gain. See Table 70.
1 LLF Loudness low boost frequency. 0 = 50 Hz; 1 = 100 Hz.
0 LHB Loudness high boost enable. 0 = loudness low boost is enabled; 1 = loudness low
boost and loudness high boost are enabled.
LDN4 LDN3 LDN2 LDN1 LDN0 LOUDNESS CONTROL (dB)
00000 0
00001 1
00010 2
::::: :
10010 18
10011 19
10100 20
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20
16
12
8
4
22
18
14
10
6
2
6
4
2
0
MHC343
10
G
loudness
(dB)
f
audio
(Hz)
10
2
10
3
10
4
10
5
Fig.16 Loudness gain G
loudness
as a function of audio frequency f
audio
;
low boost frequency 50 Hz and high boost on.

TEF6892H/V2,557

Mfr. #:
Manufacturer:
NXP Semiconductors
Description:
IC AUDIO TONE PROCESSOR 44PQFP
Lifecycle:
New from this manufacturer.
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