STV9937 datasheet(22/49 Pages) STMICROELECTRONICS

22 / 49 page

Character Specifications

STV9937

22/49

The range of spacing lines is from 0 to 31 scan lines, in steps of one scan line each. The default

value is 0 scan lines.

The space lines are displayed in the color of the associated character background.

4.5

Character Colors

The colors for the characters, character background and blinking effect is separately programmable

for each OSD window. The color values are stored in a color-shop of 8 color-boxes for each window.

There are 4 color-shops, 1 per window, offering the user 32 possibilities of character coloring.

As the color-boxes are in RAM, the user must write to the color-box prior to using it.

Color-box data is stored in Window 0, Row 2. For more information, refer to Section 2.4: Addressing

Map on page 12.

4.5.1

Character Background Color

A character background color can be separately programmed for each of the color-boxes. This

value is selected by bits BC, BR, BG and BB.

For more information concerning the window background color, refer to Section 3.5: Window

Background Color.

Bit BC is used to define if a specific character background color will be displayed or if the character

background color is the color of the window background.

Table 22: Row Height (Space Lines)

FWR

FAC

Default

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

80h

03h

RSPA[4:0]

Figure 9: Row Height Definition

Table 23: color-box

FWR

FAC

Default

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

82h

00h to

1Fh

BLINK

A B

Total Row Height

RSPA[4:0] Space Lines

CH[6:0] Character Height

RSPA[4:0] Space Lines

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