0
1715
0H
Base H Counter
venc_dtv_hs
venc_dtv_vs
1
2
3
4
5
6
7
8
9
10
243 244 245 246 247 248
1680 1681 1682 1683
DTV_HS_H_STA=0
DTV_HS_H_STP=4
DTV_VS_H_STA=5
DTV_VS_H_STP=9
DTV_FID_H_STA=8
1684 1685
venc_dtv_fid
venc_dtv_avid
DTV_AVID_H_STA=242
DTV_AVID_H_STP=1682
clk2x
D0
D1
D719
D718
phase1x
ygin/ubin/vrin
242
1 clk1x
Base V Counter
Internal Modules
97
SPRUHI7A – December 2012 – Revised June 2016
Copyright © 2012–2016, Texas Instruments Incorporated
High-Definition Video Processing Subsystem (HDVPSS)
For the analog video output, one of the following TV formats in
also needs to be specified by
the FMT register accordingly. The FMT setting specifies the format-dependent timing parameters such as
sync rise/fall build-up time, active video rise/fall time, vertical sync and equalizing pulse position, WSS/CC
waveform position and so on.
Table 1-32. TV Formats
FMT
Video Format
Type
0
525i
SDTV
1
625i
For SDTV (525i/625i), composite video (CVBS) and S-video are available. The output combination from
two DACs is described in
.
1.2.6.2.3.2 Input I/F Timing
The input I/F consist of venc_dtv_hs (horizontal sync), venc_dtv_vs (vertical sync), venc_dtv_fid (field ID)
and venc_dtv_avid (active video). The timing of each signal is programmable. The timing reference is the
internal base counter. The internal base counter starts when VIEN register is set to 1 and the venc_en
signal is HIGH. The phase between clk1x and the internal base counter is maintained so that the
horizontal counter begins increment at phase1x = 1 as shown in
The horizontal timing of each signal is configured in unit of clk2x. The AVID timing should be configured
considering the input latency of one cycle of clk1x.
Vertical timing resolution is 1/2H. Independent AVID timings are available for each field for an interlaced
format. VS and FID have a unique configuration for both fields
For progressive or non-interlaced formats, the internal base FID is fixed to low. However, it is possible to
force toggling venc_dtv_fid at the specified line by setting DTV_FID_F_STA0 register to 1.
and
show the input I/F timing chart with example settings.
Figure 1-43. Input I/F Horizontal Timing