SDA5523 Micronas Semiconductor, SDA5523 Datasheet - Page 73

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

DATA SHEET
Below some examples can be found to show how the
character addressing depends on the boundary defini-
tions:
2.13.4.3.1. Example 1
Boundary Pointer 1 set to 848
Boundary Pointer 2 set to 928
2.13.4.3.2. Example 2
Boundary Pointer1 set to 848
Boundary Pointer2 set to 848d
2.13.4.3.3. Example 3
Boundary Pointer 1 set to 768
Boundary Pointer 2 set to 928
Micronas
From
768
848
928
From
768
848
From
768
928
Character Address
Character Address
Character Address
d
d
d
d
d
d
d
To
847
991
1023
To
847
1023
To
927
1023
d
d
d
d
d
d
d
Description
1-bit DRCS characters
2-bit DRCS characters
4-bit DRCS characters
Description
1-bit DRCS characters
4-bit DRCS characters
Description
2-bit DRCS characters
4-bit DRCS characters
d
d
d
d
d
Sept. 10, 2004; 6251-556-3DS
2.13.4.4. Flash
The bit FLASH inside the character display word
(CDW; see also Section 2.13.4.) is used to enable
flash for a character.
The meaning of the flash attribute is different for ROM
characters and 1-bit DRCS characters in comparison
to the meaning of flash for 2-bit and 4-bit DRCS char-
acters.
For flash rate control see also the global attribute
"FLRATE1 … FLRATE0" in Section 2.13.7.3..
2.13.4.4.1. Flash for ROM Characters and 1-Bit
For ROM characters and 1-bit DRCS characters the
enabled flash mode causes the foreground pixels to
alternate between the foreground and background
color vector.
2.13.4.4.2. Flash for 2-Bit and 4-Bit DRCS Charac-
For these characters the enabled flash mode causes
the DRCS pixels to alternate between the 2-bit/ 4-bit
color vector and the background color vector which is
defined by the parameters BG2 … BG0 inside charac-
ter display word (CDW; see also Section 2.13.4. on
page 70).
FLASH
0
1
See also Section 2.13.4. on page 70 / Character
Display Word (CDW)
DRCS Characters
ters
Description
Steady (flash disabled)
Flash
SDA 55xx
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