M37225M6_15 datasheet(85/128 Pages) RENESAS

Part #	M37225M6

Description	SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER

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Manufacturer	RENESAS [Renesas Technology Corp]

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M37225M6/M8/MA/MC-XXXSP, M37225ECSP

Rev.1.00

Nov 01, 2000

page 83 of 124

REJ03B0136-0100Z

8.10.3 Raster Display

The raster display is displayed on the lower layer than the SPRITE

and block layers. There are 2 kinds of displays; the flat display and

the patterning display.

In the raster flat display, an entire screen (raster) can be colored by

setting the following bits; bits 5 to 7 of the OSD I/O polarity register

and bits 6 and 7 of the OSD control register. Since each of the R, G,

B, OUT1, and OUT2 pins can be switched to raster coloring output, 8

raster colors can be obtained.

In the raster patterning display, SPRITE fonts are displayed repeat-

edly on an entire screen (raster). At this time, set “1” to bits 6 and 7 of

the SPRITE control register.

Horizontal display start positions of the raster patterning display are

set by the SPRITE H register. At this time, setting value is synchro-

nized with VSYNC signal.

Characters for patterning are set by bits 4 and 5 of the SPRITE con-

trol register and coloring are set by bits 0 to 3. The raster color is

output on the background of SPRITE font.

Fig. 8.10.36 Raster Flat Display Example

Note that the raster patterning display and the SPRITE display can-

not be used at the same time.

When the character color/the character background color overlaps

with the raster color, the color (R, G, B, OUT1, OUT2), specified for

the character color/the character background color, takes priority of

the raster color. This ensures that the character color/the character

background color is not mixed with the raster color.

The raster flat display example is shown in Figure 8.10.36, the raster

patterning display example is shown in Figure 8.10.37.

HSYNC

A'

A

OUT1

R

G

B

: Character color “RED” (R + OUT1 + OUT2)

: Border color “BLACK” (OUT1 + OUT2)

: Background color “MAGENTA” (R + B + OUT1 + OUT2)

: Raster color “BLUE” (R + OUT1 + OUT2)

Signals

across

A-A'

OUT2

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