ST92195D datasheet(103/249 Pages) STMICROELECTRONICS

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ST92195C/D - ON SCREEN DISPLAY (OSD)

ON SCREEN DISPLAY (Cont’d)

Figure 56. Half-Tone Display Scheme

7.4.4.2 Row Attributes

The header and status row attributes are set using

the HSCR R244 (F4h) Page 32 register. The row

enable bits as set in registers DE0R .. 2 R253

..255 Page 32.

Header Enable

When the display is in line mode, row 0, called the

header, is also usable. It no longer acts as a head-

er but simply as an additional row.

Status Row Enable

The display of the two status rows can be enabled

individually.

Row Enable Bits

1 bit per row, for rows from 1 to 23, in page mode.

Serial Attributes

Serial Mode is selected by resetting the SPM bit in

Serial attributes are active until the end of the line

or a superseding serial attribute.

In this display mode, the attribute code and the

character code are in the same memory area (Fig-

ure 57 on page 104).

The attribute takes the place of an alpha charac-

ter, and the OSD displays a space character de-

fined on 1 byte in Serial Mode.

VIDEO PROCESSOR

Contrast

Reduction

Internal Red

Internal Green

Internal Blue

Rout

Gout

Bout

RGB

Switch

ST9 MCU

R G

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