Справочник Пользователя для AMD LX 900@1.5W
286
AMD Geode™ LX Processors Data Book
Display Controller
33234H
6.5.1.9
Video Overlay Support
The GUI block also supports a video overlay function. The
DC has flexible addressing capability for YUV 4:2:2 and
YUV 4:2:0 display surfaces. Video data is stored in a sepa-
rate buffer within the off-screen frame buffer. Independent
surface pitch control is provided for Y and U/V.
DC has flexible addressing capability for YUV 4:2:2 and
YUV 4:2:0 display surfaces. Video data is stored in a sepa-
rate buffer within the off-screen frame buffer. Independent
surface pitch control is provided for Y and U/V.
The DC fetches the contents of the video and transmits it to
the Video Processor once per frame.
the Video Processor once per frame.
The Video Processor provides enhanced overlay scaling
and filtering options.
and filtering options.
The width of the video output port is 32 bits. This allows the
display of high-resolution video source material (up to 1920
horizontal pixels) mixed with high-resolution graphics data.
display of high-resolution video source material (up to 1920
horizontal pixels) mixed with high-resolution graphics data.
Table 6-36 illustrates the minimum video port bandwidth
required for a number of different graphics display resolu-
tions.
required for a number of different graphics display resolu-
tions.
Table 6-36. Video Bandwidth
Resolution
Refresh Rate (Hz)
Line Rate
(KHz)
Video Source
Size (B)
Video Port Bandwidth
Required (MB/s)
640x480
60
31.5
1440
45.4
2160
68.0
85
43.3
1440
62.4
2160
93.5
800x600
60
37.9
1440
54.5
2160
81.9
85
53.7
1440
77.3
2160
116.0
1024x768
60
48.4
1440
69.7
2160
105
85
68.7
1440
98.9
2160
148.4
1280x1024
60
64.0
1440
92.2
2160
138
85
91.1
1440
131
2160
197
1600x1200
60
75.0
1440
108
2160
162
70
87.5
1440
126
2160
189