4.7.3.7
SYSVIEN - Video Input enable control register
This register specifies the source of the Video Input data and enables Video Input.
Access
This register can be read/written in 32-bit units.
Address
<SysC_Base> + 20
H
Initial Value
0000 0000
H
. This register is initialized by any reset.
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
0
0
VISEL[1:0]
0
0
0
VIEN
R
R
R
R
R
R
R
R
R
R
R/W
R
R
R
R/W
Writing to the read-only bits is ignored, reading returns undefined values.
Bit
Bit name
Function
5 to 4
VISEL[1:0]
Selects the data source of the Video Input
00
B
no data to Video Input
01
B
Video Input data source is external video input interface
10
B
loopback mode 0: Video Input data source is Video Output 0
11
B
loopback mode 1: Video Input data source is Video Output 1
0
VIEN
Enables the Video Input
0
Video Input disabled
1
Video Input enabled
Note that setting SYSVIEN.VIEN = 1 does not start capturing of Video data. This is done
by setting ViControl.CAPEN = 1.
Caution
In case video data capturing should be stopped and the Video Input module
should be disabled, it must be done in the following sequence:
•
disable capturing by ViControl.CAPEN = 0
•
wait the time of one complete frame
•
disable the Video Input by setting SYSVIEN.VIEN = 0
Chapter 4
System Controller
114
Preliminary User's Manual S19203EE1V3UM00
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