
Philips Semiconductors
PNX8510/11
Analog Companion Chip
9397 750 08865
Koninklijke Philips Electronics N.V. Copyright 2001. All rights reserved.
Product data
Rev. 02 — 8 October 2001
7 of 84
2.2.5 RGB 4:4:4 Interleaved
This mode supports two video data streams through one physical video interface. It can be used
to utilize both video encoder channels in the chip with one interface only or to hook up two
PNX8510/11 devices to one source providing an interleaved data stream. Each chip extracts
one slice from the interleaved stream. This video format is useful for the standard definition RGB
data path as well as for the HD data path.
2.2.6 YUV 4:4:4 Interleaved
This mode supports two video data streams through one physical video interface. It can be used
to utilize both video encoder channels with one interface only or to hook up two PNX8510/11
devices to one source providing an interleaved data stream. Each chip extracts one slice from
the interleaved stream. This video format is useful for the HD data path only.
There are two modes defined for interleaved data streams. One is to run the interface at twice
the speed and provide a qualifier on the HSYNC input to qualify a certain slice. The qualifier is
essentially the interface clock divided by two.
The other interleaved interface format works on both clock edges of the interface clock, so one
slice is latched at the positive edge and the other slice is latched at the negative edge of the
interface clock.
2.2.7 YUV 4:2:2 HD Two Channel Format
This format is used only for high definition video modes that exceed interface clock requirements
of 81 MHz. For this video interface mode, both physical interfaces of the chip are utilized. The
primary interface gets a D1-like data stream, which only contains the luminance information,
while the secondary D1 interface carries the chrominance information.
Figure 7: RGB 4:4:4 Interleaved
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Figure 8: YUV 4:4:4 Interleaved
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Figure 9: YUV 4:2:2 HD Two Channel Format
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