參數(shù)資料
型號: M37281MFH-XXXSP
廠商: Renesas Technology Corp.
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
中文描述: 單芯片8位CMOS微機隱蔽字幕解碼器和屏幕顯示控制器
文件頁數(shù): 71/172頁
文件大?。?/td> 1319K
代理商: M37281MFH-XXXSP
Rev.1.01 2003.07.16 page 71 of 170
M37281MAH
XXXSP,M37281MFH
XXXSP,M37281MKH
XXXSP, M37281EKSP
8.11.1 Triple Layer OSD
Three built-in layers of display screens accommodate triple display
of channels, volume, etc., closed caption, and SPRITE displays within
layers 1 to 3.
The layer to be displayed in each block is selected by bit 0 or 1 of the
OSD control register 2 for each display mode (refer to Figure 8.11.7).
Layer 3 always displays the SPRITE display.
Table 8.11.2 Mixing Layer 1 and Layer 2
Block in Layer 1
CC, OSD, CDOSD mode
1,
2 (CC mode)
1 to
3 (OSD, CDOSD mode)
1T
C
1/2H, 1T
C
1H
(CC mode)
1T
C
1H, 1T
C
1/2H,
2T
C
2H, 3T
C
3H
(OSD, CDOSD mode)
Arbitrary
Block
Parameter
Display mode
Pre-divide ratio
Dot size
Horizontal display start position
Vertical display start position
When the layer 1 block and the layer 2 block overlay, the screen is
composed (refer to Figure 8.11.5) with layer mixing by bit 6 or 7 of
the OSD control register 1, as shown in Figure 8.11.3. Layer 3 al-
ways takes display priority of layers 1 and 2.
Notes 1:
When mixing layer 1 and layer 2, note Table 8.11.2.
2:
OUT2 is always ORed, regardless of values of bits 6, 7 of the OSD
control register 1. And besides, even when OUT2 (layer 1 or layer 2)
overlaps with SPRITE display (layer 3), OUT2 is output.
Block in Layer 2
OSD, CDOSD mode
Same as layer 1
Same size as layer 1
1.5T
C
can be selected only when: layer 1
s pre-divide ratio =
2
AND layer 1
s horizontal dot size = 1T
C
.
As this time, vertical dot size is the same as layer 1.
Same position as layer 1
Arbitrary
Pre-divide ratio =
2
1T
C
1/2H, 1.5T
C
1/2H
1T
C
1H, 1.5T
C
1H
Pre-divide ratio =
1
1T
C
1/2H
1T
C
1H
However, when dot size is 2T
C
2H or 2T
C
3H, set difference between vertical display position of
layer 1 and that of layer 2 as follows.
2T
C
2H: 2H Units
3T
C
3H: 3H Units
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