SDA5523 Micronas Semiconductor, SDA5523 Datasheet - Page 79

• Manufacturer Part Number: SDA5523
• Description: SDA55xx TVText Pro
• Manufacturer: Micronas Semiconductor

DATA SHEET
2.13.6. Character Display Area Resolution
Table 2–52: Character display area resolution
The count of rows of the character display area can be
adjusted in a range from 33 to 64 columns in horizontal
direction. In vertical direction the character display
area is fixed to 25 rows. It depends on the settings for
synchronization mode, pixel frequency and character
matrix if all these columns are visible on the tube.
The programmable parameters DISALH4 to DISALH0
are the binary representation of an offset value. This
offset value plus 33
Table 2–52 shows some examples for the settings.
2.13.7. Cursor
The 2-bit color vector matrix of the cursor is stored in
the XRAM. A programmable pointer is used, so that
the matrix can be stored at any location inside the
XRAM (see also Section 2.13.9.3. on page 102).
The cursor matrix has the same resolution as the char-
acter matrix (see also Section 2.13.7.6. on page 94).
If the Global Display Double Height (see also
Section 2.13.7.2. on page 83) is set to double height,
the rows which are displayed in double height the cur-
sor is also displayed in double height. For rows which
are displayed in normal height, the cursor is also dis-
played in normal height. If cursor is displayed over two
rows and one of these rows is displayed in double
height, and the other is displayed in normal height, cur-
sor is also partly displayed in double height and partly
in normal height. Cursor-Pixels which are shifted to a
non-visible row are also not displayed on the screen.
Micronas
DISALH4
0
0
0
…
0
1
…
1
1
See also Section 2.13.5. / Global Display Word (GDW)
d
gives the count of columns:
DISALH3
0
0
0
1
0
1
1
DISALH2
0
0
0
1
0
1
1
Sept. 10, 2004; 6251-556-3DS
DISALH1
0
0
1
1
0
1
1
The cursor can be shifted in horizontal and vertical
direction pixel by pixel all over the character display
area.
Table 2–53: Setting of CURSEN to enable cursor
mode
The display position of the cursor is determined by a
display column value, a display row value and on pixel
level by a pixel shift in horizontal and vertical direction.
The cursor can not be shifted more than one character
height and one character width on pixel level. The cur-
sor is clipped at the border of the display area. In full
screen
Section 2.13.7.2. on page 83) the cursor is also dis-
played in double height.
The pixel shift value is always related to a south-east
shift. The pixel shift is determined by the parameters
shown in Table 2–54 and Table 2–55 on page 80.
CURSEN
0
1
See also Section 2.13.5. on page 75 / Global Dis-
play Word (GDW)
double
DISALH0
0
1
0
1
0
0
1
height
Description
Cursor mode disabled
Cursor mode enabled
mode
SDA 55xx
Description
33 columns
34 columns
35 columns
…
48 columns
49 columns
…
63 columns
64 columns
(See
also
79