UMA1021M/C2 Philips Semiconductors (Acquired by NXP), UMA1021M/C2 Datasheet - Page 17

• Manufacturer Part Number: UMA1021M/C2
• Description: UDA1380; Stereo Audio Coder-decoder For MD, CD And MP3
• Manufacturer: Philips Semiconductors (Acquired by NXP)

Philips Semiconductors
8.8.2
The analog mixer, which uses the mixer input of the FSDAC, can mix a signal into the FSDAC output signal via an AVC
unit (see Fig.11). The mixer can be used to mix a signal into the FSDAC output signal and play it via the headphone
driver without the complete coder-decoder running. The analog control range is 0 to 64.5 dB with a gain of 16.5 dB, and
mutes in steps of 1.5 dB (so actually the range is from +16.5 dB to 48 dB plus mute).
2003 Apr 04
handbook, full pagewidth
handbook, full pagewidth
Stereo audio coder-decoder
for MD, CD and MP3
(channel 2)
decimation
(channel 1)
data from
data input
A
digital
NALOG MIXER
filter
from
DE-EMPHASIS
DE-EMPHASIS
from analog
front-end
VOLUME
VOLUME
MUTE
MUTE
AND
AND
Fig.11 Analog mixer configuration.
AVC[5:0] L3 or I
Fig.10 Digital mixer (DAC).
SEL_SOURCE
RESISTOR
NETWORK
mixing before
sound features
PON_AVC
2
BASS-BOOST
C-bus control bits
TREBLE
17
AND
I
1f s
2
S-BUS OUTPUT BLOCK
mixing after
sound features
enable mixer
(EN_AVC)
INTERPOLATION
FILTER
to FSDAC
mixer input
MGU533
2f s
Product specification
VOLUME
MUTE
master
AND
UDA1380
to
inter-
polation
filter
MGU532