參數(shù)資料
型號(hào)： M37274MA-052SP
廠商： Mitsubishi Electric Corporation
英文描述： PHOTO SM DETECTOR
中文描述： 單芯片8位CMOS微機(jī)隱蔽字幕解碼器和屏幕顯示控制器
文件頁數(shù)： 68/147頁
文件大小： 2042K
代理商： M37274MA-052SP
68
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37274EFSP
PRELIMINARY
Notice: This is not a final specification.
Some paramentic limits are subject to change.
MITSUBISHI MICROCOMPUTERS
OSD mode
Same as layer 1
Same as layer 1 (Note)
Pre-divide ratio = 1
1T
C
1/2H
1T
C
1H
Pre-divide ratio = 2
1T
C
1/2H, 1.5T
C
1/2H
1T
C
1H, 1.5T
C
1H
Same position as layer 1
(1) Dual Layer OSD
M37274MA-XXXSP has 2 layers; layer 1 and layer 2. These layers
display the OSD for controlling TV and the closed caption display at
the same time and overlayed on each other.
Each block can be assigned to either layer by bits 6 and 5 of the
block control register (refer to Figure 65). For example, only when
both bits 5 and 6 are “1,” the block is assigned to layer 2. Other bit
combinations assign the block to layer 1.
When a block of layer 1 is overlapped with that of layer 2, a screen is
combined (refer to Figure 67) by bits 7 and 6 of the OSD control
register (refer to Figure 64).
Note:
When using the dual layer OSD, note Table 11.
Fig. 66. Image of Dual Layer OSD
CC mode
Data slicer clock or OSC1 or main clock
1 or
2 (all blocks)
1T
C
1/2H
Arbitrary
Display mode
OSD Clock source
Pre-divide ratio
Dot size
Horizontal display start position
Table 11. Conditions of Dual Layer
Note:
For the pre-divide ratio of the layer 2, select the same as the layer 1’s ratio by bit 6 of the clock control register.
Block in Layer 1
Block in Layer 2
Fig. 67. Display Example of Dual Layer OSD
Block
Parameter
Display example of layer 1 = “HELLO,” layer 2 = “CH5”
CH5
HELLO
Logical sum (OR) of
layer 1’s color and
layer 2’s color
Bit 7 = “0,” bit 6 = “0”
Layer 1’s color has priority
Bit 7 = “0”, bit 6 = “1”
HELLO
Layer 2’s color has priority
Bit 7 = “1,” bit 6 = “0”
HELLO
Layer 2
Layer
1
Block 1
Block 2
Block 7
Block 8
Block
.
Block 9
Block 10
Block 11
Block 12
Block
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