STV9937 datasheet(35/49 Pages) STMICROELECTRONICS

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STV9937

General OSD Programming

8.1

Enable OSD

The OSD window displays are enabled by the ENOSD bit.

ENOSD = 1: OSD window displays are active.

ENOSD = 0: OSD window displays are inactive. Pin FBLK = 0 and pins ROUT, GOUT and

BOUT pins = 0 (bit RGBPOL is 0). The default value is 0.

8.2

Fade-in and Fade-out Effect

The Fade-in and Fade-out effect is used to progressively increase/decrease the OSD window to/

from its full size. This effect is enabled by the FADE bit.

FADE = 1: Fade effect is active

FADE = 0: Fade effect is inactive (default value)

8.3

Full Screen Display

The STV9937 allows a full screen display with a selectable color programmable by the FBK bit as

follows:

FBK = 1: The video area is replaced by the color coded in bits FSR, FSG and FSB (full screen

color values). Pin FBLK is always 1.

FBK = 0: Normal video mode whether or not the OSD menu is displayed. The default value of

bit FBK is 0.

Table 38: Enable OSD

FWR

FAC

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

80h

00h

ENOSD

Table 39: Fade

FWR

FAC

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

80h

00h

FADE

Table 40: Full Screen Registers

FWR

FAC

Default

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

80h

01h

FBK

80h

03h

FSR

FSG

FSB

Table 41: Full Screen Colors

Color

FSR

FSG

FSB

Black (Default Value)

Blue

001

Green

010

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