6V7 Datasheet, PDF (214/298 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

M306V7MG/MH/MJ/MJA-XXXFP, M306V7FG/FH/FJ/FJAFP
(4) Border
The border is output in the OSDS/P mode. The all bordered (bordering around of character font) and
the shadow bordered (bordering right and bottom sides of character font) are selected (refer to Figure
2.16.33) by bit 2 of the OSD control register 1 (refer to Figure 2.16.3). The ON/OFF switch for borders
can be controlled in block units by bits 0 to 2 of the block control register i (refer to Figure 2.16.4).
The OUT1 signal is used for border output. The border color is fixed at color palette 8 (block). The
border color for each screen is specified by the border color register i.
The horizontal size (x) of border is 1TC (OSD clock cycle divided in the pre-divide circuit) regardless of
the character font dot size. However, only when the pre-divide ratio = 2 and character size = 1.5TC, the
horizontal size is 1.5TC. The vertical size (y) different depending on the screen scan mode and the
vertical dot size of character font.
Notes 1 : The border dot area is the shaded area as shown in Figure 2.16.35.
2 : When the border dot overlaps on the next character font, the character font has priority
(refer to Figure 2.16.36 A). When the border dot overlaps on the next character back
ground, the border has priority (refer to Figure 2.16.36 B).
3 : The border in vertical out of character area is not displayed (refer to Figure 2.16.36).
All bordered
Figure 2.16.33 Example of border display
Shadow bordered
y
Border
dot size
x
Scan mode
Vertical dot size of
character font
Horizontal size (x)
Vertical size (y)
Normal scan mode
Bi-scan mode
1/2H
1H, 2H, 3H
1/2H, 1H, 2H, 3H
1TC (OSD clock cycle divided in pre-divide circuit)
1.5TC when selecting 1.5TC for character size.
1/2H
1H
1H
Figure 2.16.34 Horizontal and vertical size of border
Rev.1.00 May 18, 2004 page 214 of 296