pnx8510 NXP Semiconductors, pnx8510 Datasheet - Page 34

• Manufacturer Part Number: pnx8510
• Description: Analog Companion Chip
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 12612
Product data
Fig 26. Mixing possibilities in interpolator 4v0
DE-EMPHASIS
DE-EMPHASIS
7.4 Programming interface
VOLUME
VOLUME
0.25 dB steps
0.25 dB steps
Quick mute
This is an overriding quickmute on the master channel, which mutes the interpolator
output signal in 32 samples using the cosine roll-off coefficients instead of 32x32
samples to mute the output. This means whenever the quickmute register is set to
one, independent of what the mute setting of the micro controller is, the output is
muted.
Mute mode
This register sets the mute mode for the MASTER MUTE to either soft mute (setting
is ‘0’) or to quick mute (setting = ‘1’). For the master channel the quickmute function
and the micro controller mute function are OR’d.
Table 21:
Table 22:
While in Mute Mode, releasing the ‘mute’ bit applies a graduated cosine startup
Figure 26
The configuration of the various interface modes and the digital video encoder setup
can be controlled via an I
horizontal blanking interval. With the VBI programming interface, a reliable real-time
programming for the PNX8510/11 video blocks can be accomplished. For instance,
this mode makes it very easy to carry the necessary programming data over to the
digital encoder to encode a certain teletext packet in a specific scanline without
channel 1
channel 2
Quick mute
0
0
1
Mute mode
0
1
VM1
VM2
MUTE
MUTE
shows the signal flow for the mute control.
Mute mode control
Mute Mode Function
Micro controller mute
0
1
X
Function
Mute function via micro controller interface is set to “soft mute.”
Mute function via micro controller interface is set to “quick-mute.”
mute1
Rev. 04 – 12 January 2004
mute2
BOOST
BASS
2
master channel
C interface or a special VBI data packet sent during the
TREBLE
mutemix
Function
No mute
1 micro controller mute...mute mode depends on
the ‘mutemode’ setting.
Overriding quick mute function
HB
double speed
(1)
input
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
VOLUME
PNX8510/11
Analog companion chip
MUTE
mute1
conditional shift
when mixing
MDB654
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