UDA1380 datasheet(41/68 Pages) ICST

41 / 68 page

2002 Sep 16

Philips Semiconductors

Product speciﬁcation

Stereo audio coder-decoder

for MD, CD and MP3

UDA1380

11.9

Master mute, channel de-emphasis and mute

Table 43 Register address 13H

Table 44 Description of register bits

Table 45 De-emphasis selection bits

BIT

Symbol

−

MTM

−−

MT2

DE2_2

DE2_1

DE2_0

Default

BIT

Symbol

−−−−

MT1

DE1_2

DE1_1

DE1_0

Default

BIT

SYMBOL

DESCRIPTION

−

default value 0

MTM

Master mute. A 1-bit value to enable the digital mute for the master. When this

bit is logic 0: no soft mute of master. When this bit is logic 1: soft mute of

master. Default value 1.

13 and 12

−

default value 00

MT2

Channel 2 mute. A 1-bit value to enable the digital mute for channel 2. After

enabling the mixer, bit MT2 must be set to logic 0. When this bit is logic 0: no

soft mute of channel 2. When this bit is logic 1: soft mute of channel 2 (default

value 1, meaning that channel 2 is always muted, even when the mixer is

enabled).

10 to 8

DE2_[2:0]

De-emphasis. A 3-bit value to enable the digital de-emphasis ﬁlter for

channel 1 and 2. Default value 000, see Table 45.

7to4

−

default value 0000

MT1

Channel 1 mute. A 1-bit value to enable the digital mute for channel 1. When

this bit is logic 0: no soft mute of channel 1. When this bit is logic 1: soft mute

of channel 1. Default value 0.

2 to 0

DE1_[2:0]

De-emphasis. A 3-bit value to enable the digital de-emphasis ﬁlter for

channel 1 and 2. Default value 000, see Table 45.

DE2_2

DE1_2

DE2_1

DE1_1

DE2_0

DE1_0

FUNCTION

off (default)

32 kHz

44.1 kHz

48 kHz

96 kHz

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