ST92196A datasheet(125/268 Pages) STMICROELECTRONICS

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- ON SCREEN DISPLAY CONTROLLER (OSD)

OSD CONTROLLER (Cont’d)

Figure 59. OSDRAM Mapping

2n+b

2p+a

Row Buffer 1

Row Buffer 2

8Fh

00h

Buffer address, Mouse &

description section

a & b values depend on the row mode and

on the number of characters to display in the row

Segment 22h

0Fh

0Eh

0Dh

0Ch

0Bh

0Ah

09h

08h

07h

06h

05h

04h

03h

02h

01h

00h

Free for user

Mouse pointer horizontal position (low)

Mouse pointer horizontal position (high)

Mouse pointer vertical position (low)

Mouse pointer vertical position (high)

Mouse font code (low)

Mouse font code (high) + foreground color

Underline color set 2 (low)

Underline color set 2 (high)

Underline color set 1 (low)

Underline color set 1 (high)

First buffer start address (low)

First buffer start address (high)

Event line (low)

Event line (high)

8Fh

70h

6Fh

50h

4Fh

30h

2Fh

10h

Extended Background Palette

Extended Foreground Palette

Basic Foreground Palette

Basic Background Palette

2p+3

2p+2

2p+1

Active Range

Row Attributes

Horizontal Shift (low)

Horizontal Shift (high) + Row Char. Count

Next buffer start addr. (low)

Next buffer start addr. (high) + Row mode

2p+6

Char (serial mode)

2p+4

2p+5

Char + Palette Attrib. (Basic parallel mode)

Char + Palette Attrib. + Shape Attrib.

(Extended parallel mode)

OSDRAM

GENERAL FEATURES

00h to 4F, 6Fh or 8Fh depending on

color palettes configured

ROW BUFFER

Any even address between 50h and 1FEh

Palette

2p is the start address of the first row buffer

Notes:

Active Range

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