M37274EFSP datasheet(68/147 Pages) MITSUBISHI

Part #	M37274EFSP

Description	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER??????

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Manufacturer	MITSUBISHI [Mitsubishi Electric Semiconductor]

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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

Pre-divide ratio = 2

1TC ! 1/2H

1TC ! 1/2H, 1.5TC ! 1/2H

1TC ! 1H

1TC ! 1H, 1.5TC ! 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)

1TC ! 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”

CH5

HELLO

Layer 2’s color has priority

Bit 7 = “1,” bit 6 = “0”

HELLO

CH5

Layer 2

Layer 1

Block 1

Block 2

Block 7

Block 8

Block 9

Block 10

Block 11

Block 12

Block

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M37274EFSP Datasheet(PDF) 68 Page - Mitsubishi Electric Semiconductor

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