LSI Logic Confidential
Video Control Register
11-7
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
Video Control Register
Cbus Address: 0xC40000
0x0
FRC
29
If set when GoI is set by software (and VCD is set), then
the associated input window will perform frame based
422 to 420 vertical chroma decimation using the current
and previous opposite parity input field (interlaced
capture of progressive input). One chroma output line will
be produced for each chroma input line, with successive
chroma output lines being stored in chroma field 0 and
chroma field 1. The first chroma output line is stored to
chroma field 0. If clear when GoI is set (and VCD is set),
then the associated input window will perform field based
422 to 420 vertical decimation of the current input field
(interlaced capture of interlaced input or progressive
capture of progressive input). One chroma output line will
be produced for every two chroma input lines, with
successive chroma output lines being stored in chroma
field 0. The FRC bit setting must be the same for all
windows in the same field.
VCP
28
Vertical chroma phase. If set when GoI is set, then the
input window is bottom field, otherwise it is top field for
chroma decimation purposes. If set when GoO is set,
then the output window is bottom field (phase 1),
otherwise it is top field (phase 0) for chroma interpolation
purposes. This bit is ignored for output windows with FRC
clear, and input windows with FRC set.
VCL
27
Vertical chroma last. If set and VCP and VCD are set
(and FRC is not set) when GoI is set by software, then
the last chroma input line will be duplicated for the last
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Res
FRC
VCP
VCL ITS IQF2 VCD
VCI
TF/PV
IQF
OQF
0
CC
VidInInt CTF
15
14
13
12
11
9
8
7
6
5
4
3
2
1
0
FilE
0
Res VidRGB
VideoPixFmt
PYfirst Hfpchr GoR
VidOutInt Echo
GoPI
P
VidFInt
GoI
GoO
Содержание DMN-8600
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