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NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
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Revision V1.30
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5.30.5 Functional Description
VPOST Processor
5.30.5.1
The Video Engine is used to scale-up the video for display. The video can be arbitrarily up-scaled
to full-screen size in horizontal and vertical direction by programming the scaling-factor registers
VA_SCALE. Similarly, the OSD function also supports up-scaling in horizontal and vertical
direction. But it only supports 2X and 4X up-scaling.
Display & Overlay Control
5.30.5.2
The Display Control unit includes timing controller and overlay controller. The timing controller
generates the required horizontal and vertical timing for display device. The display timing is
defined in the control registers, CRTC_SIZE~CRTC_VR and OSD_WINS~OSD_WINE. The
following figure specifies the registers definition.
1
2
3
5
7
9
4
6
8
10
1 2 3 4 5 6 7 8 9 10 1
HS
VS
HValid
HDEND
HTT or
Start Point
HSYNC_S
HSYNC_E
mapping
Window H
OSD_WXE
OSD_WXS
VValid
Window V
VTT or
Start point
OSD_WYS
OSD_WYE
VDEND
VRS
VRE
Figure 5.30-2
Display and Overlay Control Timing