SDA5523 Micronas Semiconductor, SDA5523 Datasheet - Page 89

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

DATA SHEET
The CLUT has a maximum width of 64 entries. The
RGB values of the CLUT entries from 0-15 are hard-
wired and can not be changed by software. The trans-
parency for the hardwired CLUT values are set by a
global attribute inside the global display word (GDW;
see also Section 2.13.5. on page 75). This global set-
ting can be overruled inside of boxes (see also
Section 2.13.7.4. on page 86)
The RGB values of the CLUT entries from 16 to 63 are
free programmable. The RGB values of the CLUT are
organized in the TVTpro XRAM in a incremental serial
order. CLUT locations inside XRAM which are not
used for OSD can be used for any other storage pur-
poses.
Table 2–67: Selection of used subCLUTX inside CDW for each individual character position
CLUT entries from 0-15 are hardwired and can not be
changed by the user.
Each of the 48 RAM programmable CLUT locations
have a width of 2 Byte. These 2 Bytes are used to
define a 3
BLANK and COR output pins. The following format is
used.
Fig. 2–13: RGB/Transparency Memory Format of
CLUT
Micronas
CLUT2
0
0
0
0
1
1
1
1
See also Section 2.13.4. on page 70-Character Display Word (CDW)
15
3
-
14
2
-
CLUTadress+1
13
T1 T0
1
×
12
4-bit RGB value plus the behavior of the
0
CLUT1
0
0
1
1
0
0
1
1
11
3
10
2
Red
1
9
0
8
CLUT0
0
1
0
1
0
1
0
1
3
7
2
Green
6
CLUTadress+0
1
5
0
4
3
3
Meaning for ROM Character and
1-bit/2-bit DRCS Characters
subCLUT0 is selected
subCLUT1 is selected
subCLUT2 is selected
subCLUT3 is selected
subCLUT4 is selected
subCLUT5 is selected
subCLUT6 is selected
subCLUT7 is selected
2
2
Blue
1
1
Sept. 10, 2004; 6251-556-3DS
0
0
The CLUT is divided in 8 subCLUTs with 8 entries for
1-bit DRCS and ROM characters. For 2-bit DRCS
characters the CLUT is divided in 8 subCLUTs with 4
entries. For 4-bit DRCS characters the CLUT is divided
in 4 subCLUTs with 16 different entries.
The subCLUTs can be selected for each character
position individual. For this three bits CLUT2, CLUT1
and CLUT0 are reserved inside the character display
word (CDW; see also Section 2.13.4. on page 70).
Fig. 2–13 shows the RBG/Transparency memory for-
mat of CLUT:
Bit 3 … 0:
Bit 7 … 4:
Bit 11 … 8: 4-bit representation of Red value
Bit 12
Bit 13
Bit 14
Bit 15
4-bit representation of Blue value
4-bit representation of Green value
Directly fed to BLANK pin
Directly fed to COR pin
Reserved
Reserved
Meaning for 4-bit DRCS
Characters
subCLUT0 is selected
subCLUT1 is selected
subCLUT2 is selected
subCLUT3 is selected
subCLUT0 is selected
subCLUT1 is selected
subCLUT2 is selected
subCLUT3 is selected
SDA 55xx
89