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Secondary:
•
CS timing reference output shared with the HS pin
•
DE (indicates active region) shared with the FIELD pin
The user can program the primary and secondary synchronization signals, repositioning them in order to control the display area, as
shown in
Figure
96. Note that the Vertical Blanking Interval (VBI) positioning control is also available for the auto graphics mode. Refer
to Section
9.14
for further details.
CP Primary Synchronization Signals
9.8.1
The three primary synchronization signals have certain default positions, depending on the video standard in use.
To allow for a glueless interface to downstream ICs, there is the facility to adjust the position of edges on the three primary
synchronization signals.
Figure 97, Figure
position of HS, VS, and FIELD. The positions of those signals can be adjusted in both directions by using the following controls:
•
start_hs[9:0]
•
end_hs[9:0]
•
start_vs[3:0]
•
end_vs[3:0]
•
start_fe[3:0]
•
start_fo[3:0]
Rev. A May 2012
Figure 96: Synchronization Repositioning and Displayed Area
98,
Figure
99,
Figure
100,
Figure
279
101,
Figure
102,
Figure
103, and
ADV7850
Figure 104
show the nominal
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