uda1355h-n2 NXP Semiconductors, uda1355h-n2 Datasheet - Page 16

• Manufacturer Part Number: uda1355h-n2
• Description: Stereo Audio Codec With Spdif Interface
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 7 Interpolation filter characteristics
7.7.3
The UDA1355H has a digital mixer inside the interpolator.
The digital mixer can be used as a cross over or a selector.
A functional block diagram of the mixer mode is shown in
Fig.9. This mixer can be used in microcontroller mode
only.
The UDA1355H can be set to the mixer mode by setting
bit MIX = 1. In the mixer mode, there are three volume and
2003 Apr 10
handbook, halfpage
Pass-band ripple
Stop band
Dynamic range
Stereo audio codec with SPDIF interface
f
f
gain
(dB)
c
s
= 70 Hz
= 44.1 kHz
ITEM
10
10
8
6
4
2
0
2
4
6
8
D
Fig.7 Resonant bass boost example 1.
1
IGITAL MIXER
CONDITIONS
10
0 to 0.4535f
0 to 0.45f
>0.55f
Peak gain = 10 dB
Shape factor = 1.4142
s
s
s
10
2
f (Hz))
VALUE (dB)
MGU832
0.035
140
60
10
3
16
mute controls available: for source 1, for source 2 and for
the master (sum) signal. All three volume ranges can be
controlled in 0.25 dB steps.
To prevent clipping inside the mixer, the signals are scaled
with 6 dB before mixing, therefore the sum of the two
signals is always equal to or lower than 0 dB. After the
mixing there is a 6 dB gain in the master volume control.
This means that at the analog output the signal can clip,
but the clipping can be undone by decreasing the master
volume control.
The output of the mixer is available via the I
or via the SPDIF output. The output signal of the mixer is
scaled to a maximum of 0 dB, so the digital output can
never clip.
handbook, halfpage
f
f
gain
(dB)
c
s
= 70 Hz
= 44.1 kHz
10
10
8
6
4
2
0
2
4
6
8
Fig.8 Resonant bass boost example 2.
1
10
Peak gain = 10 dB
Shape factor = 1.4142
Preliminary specification
10
2
UDA1355H
f (Hz))
MGU831
2
S-bus output
10
3