Chroma stage
Luma stage
Color
Space
Converter
Timing
and
synchronization
Y
CbCr
Cr/R
[7:0]
Modulator
and
hue control
SIN/COS
block
HSYNC
VSYNC
FID
CLK2X(27MHz)
RESETB
Y/G[7:0]
Cb/B[7:0]
+
Control
registers
EAV
SAV
YCbCr[7:0]
Y
Cb
Cr
Cross-
color filter
AVID
CLK4X(54MHz)
CLK1X(13.5MHz)
C
Y
2x
interpolation
Video encoder
L4 interconnect
C[9:0]
Data clock
Chroma video
DAC2
Luma/
composite
video DAC1
TVDET
CHROMA_ENABLE
DAC2 enable
Data clock
camdss_swpu176-public-079
2x
interpolation
2x
interpolation
1
0
1
0
DAC1 enable
CVBS_Y[9:0]
LUMA_ENABLE
COMPOSITE_ENABLE
CVBS
TV Detection
pulse
Y[9:0]
CVBS[9:0]
C[9:0]
VENC_OUT_SEL
Public Version
www.ti.com
Display Subsystem Functional Description
Figure 7-106. Video Encoder Architecture Overview
NOTE:
Output video mode can be either composite video (CVBS output) or separate video
(S-video: Luma and Chroma outputs):
•
Composite video: only AVDAC1 is used
•
Separate video (Luma/Chroma): Both AVDAC1 (Luma) and AVDAC2 (Chroma) are used
The selection is programmed with DSS.
[6] VENC_OUT_SEL
bit. Composite video is the default selection.
7.4.7.1
Test Pattern Generation
For diagnostic purposes, the data manager can be forced to output 100/100 color bar RGB/YCbCr data by
setting the SVDS field
[7:6] register to 0x1.
Table 7-39. 100/100 Color Bar Table
COLOR
R
G
B
Y
Cb
Cr
White
255
255
255
235
128
128
Yellow
255
255
0
210
16
146
Cyan
0
255
255
170
166
16
Green
0
255
0
145
54
34
Magenta
255
0
255
106
202
222
Red
255
0
0
81
90
240
Blue
0
0
255
41
240
110
Black
0
0
0
16
128
128
1691
SWPU177N – December 2009 – Revised November 2010
Display Subsystem
Copyright © 2009–2010, Texas Instruments Incorporated