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STV2050A Datasheet(PDF) 43 Page - STMicroelectronics

Part # STV2050A
Description  AUTOMATIC MULTISCAN DIGITAL CONVERGENCE PROCESSOR
PDF  83 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STV2050A Datasheet(HTML) 43 Page - STMicroelectronics

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STV2050A - BLANKING OF VIDEO SIGNALS
grammed for VVB are greater than those of the VGD, unexpected effects will appear on the
screen.
Figure 25. Vertical Blanking
8.3 BLANKING FOR AUTO-ALIGNMENT PATTERN
The blanking for the auto-alignment pattern and for the other video pattern are linked to the
same timing which is defined by the HVB and VVB bits as described in the following sections.
8.4 FAST BLANKING
The FBLK pin is used to provide a fast switching signal that selects the source of the video
signal to be displayed on the screen. Features are controlled by the D7 register.
HAE
0: Horizontal blanking off
1: Horizontal blanking on
VAE
0: Vertical blanking off
1: Vertical blanking on
STA
0: FBLK depends on the TVH, TVV and FAS bits (see below)
1: FBLK is forced to 1, if a pattern color is enabled by the COV bits.
(Refer to Section 7.1.1 "Pattern Selection" on page 33)
TVH
Blanking of TV picture in horizontal direction
0: Blanking off
1: Blanking on
12
0
1
2
3
4
5
6
7
8
9
10
11
12
0
V-Gridlines
VVB
VVB
V blank stop
V blank start



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