M306V2EEFS datasheet(183/271 Pages) RENESAS

183 / 271 page

Rev.1.40

Oct 06, 2004 page 183 of 269

M306V2ME-XXXFP, M306V2EEFP

Display mode

Pre-divide ratio

Dot size

Horizontal display start position

Vertical display start position

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.

CC, OSDS/L, 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

(OSDS/L, CDOSD mode)

Arbitrary

Table 2.16.2 Mixing layer 1 and layer 2

Note: In the OSDL mode, 1.5TC size cannot be used.

Block in Layer 1

Block in Layer 2

Block

Parameter

OSDS/L, CDOSD mode

Same as layer 1 (See 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(Seenote)

• 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

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

Fig 2.16.5 Triple layer OSD

Layer 2

Layer 1

Block 1

Block 2

Block 7

Block 8

Layer 3

Block 9

Block 15

Block 10

Block 16

Sprite

R, G, B of layer 1/layer 2

OUT2 of layer 1/layer 2

Note : When layer 1/layer 2 and SPRITE display

overlay each other, only OUT2 in layer 1/layer 2

is output.

SPRITE

Layer 1/layer 2

SPRITE

(except transparent)

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