TEF6894H datasheet(35/55 Pages) PHILIPS

35 / 55 page

2003 Oct 21

Philips Semiconductors

Product speciﬁcation

Car radio integrated signal processor

TEF6894H

handbook, halfpage

0.25

0.5

1.5

Veq (V)

0.75

mute

(dB)

1.25

MHC341

(1)

(2)

(3)

(4)

Fig.14 Soft mute depth

αmute caused by ultrasonic noise.

a: MST[2:0] = 000, MSL[1:0] = 11

b: MST[2:0] = 100, MSL[1:0] = 01

(1) UMD[1:0] = 00 = 3 dB.

(2) UMD[1:0] = 01 = 6 dB.

(3) UMD[1:0] = 10 = 9 dB.

(4) UMD[1:0] = 11 = 12 dB.

11.2.8

SUBADDRESS AH; RADIO

Table 34 Format of data byte AH with default setting

Table 35 Description of data byte AH

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

MONO

DEMP

ING1

ING0

SEAR

NBS1

NBS0

00100110

BIT

SYMBOL

DESCRIPTION

7AM

AM selection. 0 = FM mode selected; 1 = AM mode selected.

MONO

Stereo decoder mono. 0 = set to FM stereo; 1 = set to FM mono.

DEMP

De-emphasis time constant. 0 = 75

µs; 1 = 50 µs; see Fig.15.

4 and 3

ING[1:0]

Input gain. See Table 36.

SEAR

LEVEL and MPH detector time constant. 0 = standard time constant selected;

1 = fast time constant of 60 ms selected.

1 and 0

NBS[1:0]

AM noise blanker and the FM noise blanker MPX sensitivity. See Table 37.

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