M306V2ME Datasheet, PDF (183/276 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

MITSUBISHI MICROCOMPUTERS
M306V2ME-XXXFP
M306V2EEFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
2.16.1 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 2.16.7). Layer 3 always displays the sprite display.
When the layer 1 block and the layer 2 block overlay, the screen is composed with layer mixing by bit
6 or 7 of the OSD control register 1, as shown in Figure 2.16.5. Layer 3 always takes display priority of
layers 1 and 2.
Notes 1: When mixing layer 1 and layer 2, note Table 2.16.2.
2: OSDP mode is always displayed on layer 1. And also, it cannot be overlapped with layer 2’s block.
3: OUT2 is always ORed, regardless of values of bits 6, 7 of the OSD control register 1. And
besides, even when OUT2 (layer 1 and layer 2) overlaps with SPRITE display (layer 3),
OUT2 is output without masking.
Table 2.16.2 Mixing layer 1 and layer 2
Parameter
Block
Block in Layer 1
Block in Layer 2
Display mode
Pre-divide ratio
Dot size
Horizontal display start position
Vertical display start position
CC, OSDS/L, CDOSD mode
OSDS/L, CDOSD mode
! 1, ! 2 (CC mode)
Same as layer 1 (See note)
! 1 to ! 3 (OSD, CDOSD mode)
1TC ! 1/2H, 1TC ! 1H
Pre-divide ratio = ! 1
Pre-divide ratio = ! 2
(CC mode)
1TC ! 1/2H
1TC ! 1/2H, 1.5TC ! 1/2H
1TC ! 1H
1TC ! 1H, 1.5TC ! 1H (See note)
1TC ! 1H, 1TC ! 1/2H, 2TC ! 2H, • Same size as layer 1
3TC ! 3H
(OSDS/L, CDOSD mode)
•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.
Arbitrary
Same position as layer 1
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
Note: In the OSDL mode, 1.5TC size cannot be used.
Layer 3
Sprite
Block 9
Block 10
Block 15
Block 16
Layer 2
Fig 2.16.5 Triple layer OSD
Rev. 1.0
Block 1
Block 2
Block 7
Block 8
Layer 1
Note : When layer 1/layer 2 and SPRITE display
overlay each other, only OUT2 in layer 1/layer 2
is output.
Layer 1/layer 2
SPRITE
(except transparent)
A
A'
SPRITE
R, G, B of layer 1/layer 2
OUT2 of layer 1/layer 2
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