M306V2EEFS datasheet(224/271 Pages) RENESAS

224 / 271 page

Rev.1.40

Oct 06, 2004 page 224 of 269

M306V2ME-XXXFP, M306V2EEFP

2.16.15 Window Function

The window function can be set windows on-screen and output OSD within only the area where the

window is set.

The ON/OFF for vertical window function is performed by bit 5 of the OSD control register 1 and is used

to select vertical window function or vertical blank function by bit 6 of the OSD control register 2. Accord-

ingly, the vertical window function cannot be used simultaneously with the vertical blank function. The

display mode to validate the window function is selected by bits 5 to 7 of the OSD control register 3. The

top border is set by the top border control register (TBR) and the bottom border is set by the bottom

border control register (BBR).

The ON/OFF for horizontal window function is performed by bit 4 of the OSD control register 2 and is

used interchangeably for the horizontal blank function with bit 5 of the OSD control register 2. Accord-

ingly, the horizontal blank function cannot be used simultaneously with the horizontal window function.

The display mode to validate the window function is selected by bits 5 to 7 of the OSD control register 3.

The left border is set by the left border control register (LBR), and the right border is set by the right

border control register (RBR).

Notes 1: Horizontal blank and horizontal window, as well as vertical blank and vertical window can not be

used simultaneously.

2: When the window function is ON by OSD control registers 1 and 2, the window function of

OUT2 is valid in all display mode regardless of setting value of the OSD control register 3 (bits

5 to 7). For example, even when make the window function valid in only CC mode, the function

of OUT2 is valid in OSDS/L/P and CDOSD modes.

3: As for SPRITE display, the window function does not operate.

Figure 2.16.45 Example of window function (When CC mode is valid)

CDOSD mode

FG H

M N O

PQ R

OSDS/L/P mode

AB CD E

W X

Screen

CC mode

Window

Bottom border

of window

Top border

of window

Right border

of window

Left border

of window

Window

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