ST92185B datasheet(98/178 Pages) STMICROELECTRONICS

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ST92185B - ON SCREEN DISPLAY (OSD)

ON SCREEN DISPLAY (Cont’d)

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 9).

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:

Figure 57. Example of a Row in Serial Mode

Default foreground

Default background

Length of row = 40 Characters

global

A R D O Z

A A

Propagation

Display

A R D O Z

A A

Sty

Foreground color attribute

Characters

Black background attribute

Steady attribute

Flashing attribute

Memory location

FLASHING

can be half intensity

VR02115A

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