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*1: Vertical display position
Counting for the vertical display position is started 1Hsync after the sync pulse of the vertical sync
signal (VSYNC pin input signal) as shown below.
Figure 18.2-5 shows the count timing for the vertical display position on the main/CC screen.
Figure 18.2-5 Count Timing for the Vertical Display Position on the Main/CC Screen
Sync signal input timing
VSYNC
HSYNC
Display output timing
RGB (digital/analog)
VOB1,VOB2
Note: If VSYNC and HSYNC are as shown above in Figure 18.2-5, the display start position
remains unchanged due to the setting of the vertical synchronization detection HSYNC
edge selection control (bit VHE) of input-output control 2 (command 13-1).
*2: Horizontal display position
The horizontal display position is the set value + several dot clocks (see "18.2.4.1 Screen Display
Position Offset") after the sync pulse significant edge (controlled by bit HE of command 13-1) of
the horizontal sync signal (HSYNC pin input signal).
The calculation for the set value of horizontal display position in the main/CC screen characters is
as follows.
Set value of horizontal display position = (X8, X7, X6, X5, X4, X3, X2) × 12 + (X0, X1) × 4 [dot]
X8
X7
X6
X5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
.
.
.
.
.
.
.
.
.
.
.
.
1
1
1
1
Note: Display start position when vertical display start
position on the main screen is set to 0
Note: However, setting of (X1, X0) = (1,1) is disabled.
X4
X3
X2
X1
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
0
0
0
1
1
0
1
0
0
.
.
.
.
.
.
.
.
.
.
.
.
1
1
1
1
CHAPTER 18 OSDC
↑
Set value of horizontal display
X0
position for main/CC characters
0
0 dot (0+0)
1
4 dots (0+4)
0
8 dots (0+8)
0
12 dots (12+0)
1
16 dots (12+4)
0
20 dots (12+8)
0
24 dots (24+0)
.
.
.
.
.
.
0
1532 dots (1524+8)
467
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