參數(shù)資料
型號: M37281MAH-XXXSP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP52
封裝: 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-52
文件頁數(shù): 146/174頁
文件大?。?/td> 1420K
代理商: M37281MAH-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)
1TC 1/2H, 1TC 1H
(CC mode)
1TC 1H, 1TC 1/2H,
2TC 2H, 3TC 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
1.5TC can be selected only when: layer 1’s pre-divide ratio = 2
AND layer 1’s horizontal dot size = 1TC.
As this time, vertical dot size is the same as layer 1.
Same position as layer 1
Pre-divide ratio = 2
1TC 1/2H, 1.5TC 1/2H
1TC 1H, 1.5TC 1H
Pre-divide ratio = 1
1TC 1/2H
1TC 1H
Arbitrary
However, when dot size is 2TC 2H or 2TC 3H, set difference between vertical display position of
layer 1 and that of layer 2 as follows.
2TC 2H: 2H Units
3TC 3H: 3H Units
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